CN114590199B - LED car light fault diagnosis feedback system - Google Patents
LED car light fault diagnosis feedback system Download PDFInfo
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- CN114590199B CN114590199B CN202111439139.2A CN202111439139A CN114590199B CN 114590199 B CN114590199 B CN 114590199B CN 202111439139 A CN202111439139 A CN 202111439139A CN 114590199 B CN114590199 B CN 114590199B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
- B60Q11/005—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention belongs to the field of automobile accessories, relates to a fault diagnosis technology, and is used for solving the problem that the existing automobile lamp fault detection system does not have the function of analyzing and checking abnormal reasons, in particular to an LED automobile lamp fault diagnosis feedback system, which comprises a processor, wherein the processor is in communication connection with a flicker detection module, a current analysis module, an overhaul recommendation module, a storage module and a life early warning module, the flicker detection module is used for detecting and analyzing the flicker condition of an automobile lamp and judging the flicker grade of the automobile lamp according to the detection and analysis result, and the flicker detection module sends the flicker grade to the processor; the current of the car lamp circuit can be detected in real time through the current analysis module, the purpose of stably monitoring the current can be achieved by carrying out current difference analysis on the highest point and the lowest point of the abnormal curve, and in addition, the current change rate obtained by calculating the abnormal curve can be fed back.
Description
Technical Field
The invention belongs to the field of automobile accessories, relates to a fault diagnosis technology, and particularly relates to a fault diagnosis feedback system of an LED automobile lamp.
Background
The LED car lamp is a car lamp adopting an LED as a light source, and is widely applied to the field of automobiles because the LED has the characteristics of high brightness, rich color types, low power consumption and long service life.
The existing LED car lamp fault detection system can only detect and analyze the car lamp running state according to the illumination intensity of the car lamp, but cannot analyze and check the abnormal reasons according to the abnormal car lamp running phenomenon, so that the abnormal reasons need to be manually analyzed by combining tools when the car lamp runs abnormally, and the car lamp maintenance process is complicated in procedure and low in maintenance efficiency.
Disclosure of Invention
The invention aims to provide an LED car lamp fault diagnosis feedback system which is used for solving the problems that the existing car lamp fault detection system does not have the function of analyzing and checking the abnormal reasons, so that the abnormal reasons need to be manually analyzed by combining tools when the car lamp runs abnormally, the maintenance process is complicated and the maintenance efficiency is low;
the technical problems to be solved by the invention are as follows: how to provide a car light fault diagnosis feedback system capable of automatically analyzing and checking the abnormal reasons when the car light runs abnormally.
The aim of the invention can be achieved by the following technical scheme:
the LED car lamp fault diagnosis feedback system comprises a processor, wherein the processor is in communication connection with a flicker detection module, a current analysis module, a maintenance recommendation module, a storage module and a service life early warning module;
the flicker detection module is used for detecting and analyzing the flicker condition of the vehicle lamp, judging the flicker level of the vehicle lamp according to the detection and analysis result, and sending the flicker level to the processor;
the processor receives the flicker level and then sends a current detection signal to the current analysis module, the current analysis module detects and analyzes the current of the car light circuit after receiving the current detection signal to obtain an abnormal curve, the coordinate values of the highest point and the lowest point of the abnormal curve are calculated to obtain a current conversion rate DB, and whether the current of the car light circuit is qualified or not is judged according to the comparison result of the current conversion rate and a current conversion threshold value;
the life early warning module is used for carrying out early warning analysis on the service life of the car lamp and obtaining a life coefficient, and judging whether the residual life of the car lamp meets the use requirement or not according to a comparison result of the life coefficient and a life threshold value.
Further, the specific process of the flicker detection analysis includes: when the car lamp works, the illumination intensity value of the car lamp is detected in real time through an illumination sensor arranged in the lamp, the illumination intensity collected by the illumination sensor is marked as light intensity, an illumination threshold value is obtained through a storage module, when the light intensity is lower than the illumination threshold value, the time when the light intensity is lower than the illumination threshold value is marked as a flicker time length, the flicker threshold value is obtained through the storage module, the flicker time length is compared with the flicker threshold value, and if the flicker time length is not smaller than the flicker threshold value, the flicker grade is judged to be a first grade; if the flicker duration is smaller than the flicker threshold, acquiring interval time when the light intensity is lower than the illuminance threshold continuously twice, and comparing the interval time with the interval threshold: if the interval time is smaller than the interval threshold value, judging the flicker level as a second level, and if the interval time is not smaller than the interval threshold value, judging the flicker level as a third level; the flicker detection module sends the flicker level to the processor.
Further, the process of obtaining the abnormal curve includes: when the car lamp works, the current value of a car lamp circuit is collected in real time through a current sensor, the car lamp working time is taken as an abscissa, the current value is taken as an ordinate, a rectangular coordinate system is established, a current curve is made in the rectangular coordinate system through the real-time current value of the car lamp circuit, a first intercept and a second intercept are made on the abscissa of the rectangular coordinate system, the first intercept and the second intercept are perpendicular to the abscissa of the rectangular coordinate system, a time constant o is set, the abscissa value of the intersection point of the first intercept and the X axis is marked as X1, the abscissa value of the intersection point of the second intercept and the X axis is marked as X2, x2=x1+o, and the initial value of X1 is zero; and synchronously moving the first and second stubs to the right, marking a current curve cut off by the first and second stubs as an analysis curve, acquiring coordinate values of the highest point and the lowest point of the analysis curve, marking the coordinate values as (DL 1, t 1) and (DL 2, t 2), marking a difference value between DL1 and DL2 as a current difference, acquiring a current threshold value through a storage module, comparing the current difference with the current threshold value, and obtaining an abnormal curve through a comparison result of the current difference and the current threshold value.
Further, the comparison process of the current difference and the current threshold value comprises the following steps: if the current difference is smaller than the current threshold value, judging that the corresponding analysis curve is a normal curve; and if the current difference is not smaller than the current threshold value, marking the corresponding analysis curve as an abnormal curve.
Further, the process of comparing the current transformation rate with the current transformation threshold includes: if the current conversion rate is not less than the current conversion threshold, judging that the current of the car light circuit is unqualified, and sending a circuit fault signal to the processor by the current analysis module; if the current conversion rate is smaller than the current conversion threshold value, judging that the current of the car light circuit is qualified, and sending a hardware fault signal to the processor by the current analysis module.
Further, the specific process of the early warning analysis of the service life of the car lamp comprises the following steps: the accumulated service time of the car lamp is obtained and marked as LS, the unit is hours, the number of times that the processor receives the hardware fault signal is obtained and marked as YC, and the accumulated service time is calculated according to the formulaObtaining a service life coefficient SM of the car lamp, wherein alpha 1 and alpha 2 are proportionality coefficients, and alpha 2 is more than alpha 1 and more than 1; p is the number of times the processor receives the primary flicker signal.
Further, a life threshold SMmin is obtained through the storage module, and a life coefficient SM of the car lamp is compared with the life threshold SMmin: if the life coefficient SM is not smaller than the life threshold SMmin, judging that the residual life of the car lamp meets the use requirement, and sending a life qualified signal to a processor by a life early-warning module; if the life coefficient SM is smaller than the life threshold SMmin, the residual life of the car lamp is judged to not meet the use requirement, and the life early-warning module sends a life early-warning signal to the processor.
Further, after receiving the current fault signal, the hardware fault signal or the life early warning signal, the processor sends the current fault signal, the hardware fault signal or the life early warning signal to the overhaul recommendation module, and after receiving the current fault signal, the hardware fault signal or the life early warning signal, the overhaul recommendation module recommends a maintenance place for an owner of the vehicle.
Further, the specific repair site recommendation process includes: marking the current position of a vehicle as a maintenance site, drawing a circle by taking the maintenance site as a circle center and r as a radius, marking the obtained circular area as a screening area, acquiring all vehicle maintenance points in the screening area and marking the vehicle maintenance points as screening objects, acquiring the linear distance between the screening objects and the maintenance site and marking the linear distance as ZL, acquiring the number of incumbent persons of the screening objects and marking the number of incumbent persons as RS, and performing a formulaObtaining a recommendation coefficient TJ of a screening object, wherein gamma is a proportionality coefficient, screening three screening objects with highest values of the recommendation coefficient TJ as primary selection objects, marking the primary selection objects with shortest linear distance to a maintenance site as recommendation objects, and sending store information of the recommendation objects to a processor, wherein the store information of the recommendation objects comprises: the geographic location of the recommended store, the number of incumbents, the contact phones of the manager, and the recommendation coefficients.
Further, the working process of the LED car lamp fault diagnosis feedback system comprises the following steps:
step one: the flicker detection module detects and analyzes the flicker condition of the vehicle lamp, judges the flicker level of the vehicle lamp according to the comparison result of the light intensity and the illuminance threshold value and the comparison result of the interval time and the interval threshold value, and sends the flicker level of the vehicle lamp to the processor;
step two: the processor receives the flicker level and then sends a current detection signal to the current analysis module, the current analysis module detects and analyzes the current of the car lamp circuit after receiving the current detection signal, a rectangular coordinate system is established, a current curve is drawn in the rectangular coordinate system, an abnormal curve is intercepted through a first intercept line and a second intercept line, current transformation rate calculation is carried out on the abnormal curve, the current transformation rate is compared with a current transformation threshold value, and whether the current of the car lamp circuit is qualified or not is judged according to a comparison result;
step three: the life early warning module calculates the life coefficient of the car lamp through the accumulated service time of the car lamp and the generation times of the hardware fault signals, and judges whether the residual life of the car lamp meets the service requirement or not through the comparison result of the life coefficient and the life threshold value.
The invention has the following beneficial effects:
1. the flicker detection module is used for analyzing the flicker condition of the LED car lamp, the flicker level of the car lamp is judged through the flicker time length and the interval time length, the flicker level is used for reflecting the abnormal degree of the running state of the car lamp, the higher the flicker level is, the higher the abnormal degree of the running state of the car lamp is, and therefore the whole state of the car lamp can be fed back through the flicker level of the car lamp;
2. the current of the car light circuit can be detected in real time through the current analysis module, a current curve is drawn in a rectangular coordinate system, the current curve is intercepted through the right movement of the first intercept line and the second intercept line, so that an abnormal curve is obtained through coordinate analysis on the intercepted current curve, the current detection process is overall process analysis, the current difference analysis on the highest point and the lowest point of the abnormal curve can achieve the purpose of stably monitoring the current, in addition, the current change rate obtained through calculation on the abnormal curve can be fed back, and therefore the fault cause of car light flickering is judged due to unstable current or equipment hardware fault;
3. the service life of the vehicle lamp is monitored in real time through the service life early warning module, a service life coefficient is obtained through calculation of the number of times of generation of hardware fault signals and the accumulated service time of the vehicle lamp, and the service life early warning module is used for reminding a user to replace the vehicle lamp in time when the service life coefficient is smaller than a service life threshold value so as to avoid the phenomenon that the temporary scrapping of the vehicle lamp affects the normal form of the vehicle;
4. the maintenance recommendation module recommends the maintenance points to the user according to the linear distance between the maintenance points and the fault location and the scale of the maintenance points, so that the user can quickly contact with the most proper maintenance point when the vehicle lamp is in fault, the fault vehicle lamp is quickly maintained, and the influence of the vehicle lamp fault on the vehicle operation is reduced.
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In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a system block diagram of a first embodiment of the present invention;
fig. 2 is a flowchart of a method according to a second embodiment of the invention.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, the LED lamp fault diagnosis feedback system comprises a processor, wherein the processor is in communication connection with a flicker detection module, a current analysis module, a maintenance recommendation module, a storage module and a life early warning module;
the flicker detection module is used for detecting and analyzing the flicker condition of the car lamp, and the specific flicker detection and analysis process comprises the following steps: when the car lamp works, the illumination intensity value of the car lamp is detected in real time through an illumination sensor arranged in the lamp, the illumination sensor is a device which is based on photoelectric effect and converts optical signals into electric signals, a photosensitive element of the early illumination sensor adopts a photosensitive resistor, a photosensitive diode made of a semiconductor material is basically used at present, the illumination intensity collected by the illumination sensor is marked as light intensity, an illumination threshold value is obtained through a storage module, when the light intensity is lower than the illumination threshold value, the time when the light intensity is lower than the illumination threshold value is marked as flicker time length, the flicker threshold value is obtained through the storage module, the flicker time length is compared with the flicker threshold value, and if the flicker time length is not lower than the flicker threshold value, the flicker grade is judged to be one level; if the flicker duration is smaller than the flicker threshold, acquiring interval time when the light intensity is lower than the illuminance threshold continuously twice, and comparing the interval time with the interval threshold: if the interval time is smaller than the interval threshold value, judging the flicker level as a second level, and if the interval time is not smaller than the interval threshold value, judging the flicker level as a third level; the flicker detection module sends the flicker level to the processor, the flicker level of the car lamp is judged according to the flicker duration and the interval duration, the flicker level is used for reflecting the abnormal degree of the running state of the car lamp, the higher the flicker level is, the higher the abnormal degree of the running state of the car lamp is, and therefore the whole state of the car lamp can be fed back through the flicker level of the car lamp;
the processor receives the flicker level and then sends a current detection signal to the current analysis module, and the current analysis module detects and analyzes the current of the car light circuit after receiving the current detection signal: when the car lamp works, the current value of a car lamp circuit is collected in real time through a current sensor, the car lamp working time is taken as an abscissa, the current value is taken as an ordinate, a rectangular coordinate system is established, a current curve is made in the rectangular coordinate system through the real-time current value of the car lamp circuit, a first intercept and a second intercept are made on the abscissa of the rectangular coordinate system, the first intercept and the second intercept are perpendicular to the abscissa of the rectangular coordinate system, a time constant o is set, the abscissa value of the intersection point of the first intercept and the X axis is marked as X1, the abscissa value of the intersection point of the second intercept and the X axis is marked as X2, x2=x1+o, and the initial value of X1 is zero; the method comprises the steps of synchronously moving a first truncated line and a second truncated line to the right, marking a current curve cut off by the first truncated line and the second truncated line as an analysis curve, obtaining coordinate values of the highest point and the lowest point of the analysis curve, marking the coordinate values as (DL 1, t 1) and (DL 2, t 2), marking a difference value between DL1 and DL2 as a current difference, obtaining a current threshold through a storage module, and comparing the current difference with the current threshold: if the current difference is smaller than the current threshold value, judging that the corresponding analysis curve is a normal curve; if the current difference is not smaller than the current threshold value, marking the corresponding analysis curve as an abnormal curve, performing current difference analysis on the highest point and the lowest point of the abnormal curve can achieve the purpose of stably monitoring the current, and analyzing the current transformation rate of the abnormal curve: the current transformation rate DB is obtained by the formula DB= | (DL 1-DL 2)/(t 2-t 1) |, and the current transformation rate obtained by calculating aiming at an abnormal curve can be used for feeding back the current change rate, so that the fault cause of the flicker of the car lamp is determined as unstable current or equipment hardware fault, the current transformation rate is a value reflecting the current change rate, the higher the value of the current transformation rate DB is, the faster the current value change rate of the car lamp circuit is, and the worse the current stability of the car lamp circuit is; comparing the current conversion rate DB with a current conversion threshold value DBmax: if the current conversion rate DB is not smaller than the current conversion threshold DBmax, judging that the current of the car light circuit is unqualified, and sending a circuit fault signal to a processor by a current analysis module; if the current conversion rate DB is smaller than the current conversion threshold DBmax, the current of the car light circuit is judged to be qualified, and the current analysis module sends a hardware fault signal to the processor.
The life early warning module is used for carrying out early warning analysis on the service life of the car lamp, and the specific process of the early warning analysis on the service life of the car lamp comprises the following steps of: the accumulated service time of the car lamp is obtained and marked as LS, the unit is hours, the number of times that the processor receives the hardware fault signal is obtained and marked as YC, and the accumulated service time is calculated according to the formulaObtaining a life coefficient SM of the car lamp, wherein the life coefficient SM is a value for reflecting the residual service life of the car lamp, and the higher the value of the life coefficient SM is, the longer the residual service life of the car lamp is, wherein alpha 1 and alpha 2 are proportionality coefficients, and alpha 2 is more than alpha 1 and more than 1; p is the number of times the processor receives the primary flicker signal;
the service life threshold SMmin is obtained through the storage module, and the service life coefficient SM of the car lamp is compared with the service life threshold SMmin: if the life coefficient SM is not smaller than the life threshold SMmin, judging that the residual life of the car lamp meets the use requirement, and sending a life qualified signal to a processor by a life early-warning module; if the life coefficient SM is smaller than the life threshold SMmin, the residual life of the car lamp is judged to not meet the use requirement, and the life early-warning module sends a life early-warning signal to the processor.
The processor receives the current fault signal, the hardware fault signal or the life early warning signal and then sends the current fault signal, the hardware fault signal or the life early warning signal to the overhaul recommendation module, and the overhaul recommendation module recommends maintenance sites for vehicle owners after receiving the current fault signal, the hardware fault signal or the life early warning signal, wherein the specific maintenance site recommendation process comprises the following steps:
marking the current position of a vehicle as a maintenance site, drawing a circle by taking the maintenance site as a circle center and r as a radius, marking the obtained circular area as a screening area, acquiring all vehicle maintenance points in the screening area and marking the vehicle maintenance points as screening objects, acquiring the linear distance between the screening objects and the maintenance site and marking the linear distance as ZL, acquiring the number of incumbent persons of the screening objects and marking the number of incumbent persons as RS, and performing a formulaObtaining a recommendation coefficient TJ of the screened object, wherein gamma is a proportionality coefficient, screening three screened objects with highest values of the recommendation coefficient TJ as primary selected objects, and maintainingThe primary selection object with the shortest repair point linear distance is marked as a recommended object, store information of the recommended object is sent to the processor, and the store information of the recommended object comprises: the geographic location of the recommended store, the number of incumbents, the contact phones of the manager, and the recommendation coefficients.
Example two
As shown in fig. 2, the method for diagnosing and feeding back the fault of the LED car lamp comprises the following steps:
step one: the flicker detection module detects and analyzes the flicker condition of the vehicle lamp, judges the flicker level of the vehicle lamp according to the comparison result of the light intensity and the illuminance threshold value and the comparison result of the interval time and the interval threshold value, and sends the flicker level of the vehicle lamp to the processor;
step two: the processor receives the flicker level and then sends a current detection signal to the current analysis module, the current analysis module detects and analyzes the current of the car lamp circuit after receiving the current detection signal, a rectangular coordinate system is established, a current curve is drawn in the rectangular coordinate system, an abnormal curve is intercepted through a first intercept line and a second intercept line, current transformation rate calculation is carried out on the abnormal curve, the current transformation rate is compared with a current transformation threshold value, and whether the current of the car lamp circuit is qualified or not is judged according to a comparison result;
step three: the life early warning module calculates the life coefficient of the car lamp through the accumulated service time of the car lamp and the generation times of the hardware fault signals, and judges whether the residual life of the car lamp meets the service requirement or not through the comparison result of the life coefficient and the life threshold value.
A LED car lamp fault diagnosis feedback system, a flicker detection module detects and analyzes the flicker condition of the car lamp, judges the flicker level of the car lamp according to the comparison result of the light intensity and the illuminance threshold value and the comparison result of the interval time and the interval threshold value, a current analysis module detects and analyzes the current of a car lamp circuit after receiving a current detection signal, establishing a rectangular coordinate system, drawing a current curve in the rectangular coordinate system, intercepting an abnormal curve through a first intercept line and a second intercept line, calculating a current transformation rate for the abnormal curve, and comparing the current transformation rate with a current transformation threshold; the life early-warning module calculates the life coefficient of the car lamp through the accumulated service time of the car lamp and the generation times of the hardware fault signals.
The foregoing is merely illustrative of the structures of this invention and various modifications, additions and substitutions for those skilled in the art can be made to the described embodiments without departing from the scope of the invention or from the scope of the invention as defined in the accompanying claims.
The formulas are all formulas obtained by collecting a large amount of data for software simulation and selecting a formula close to a true value, and coefficients in the formulas are set by a person skilled in the art according to actual conditions; such as: formula (VI)Collecting a plurality of groups of sample data by a person skilled in the art and setting a corresponding life coefficient for each group of sample data; substituting the set life coefficient and the acquired sample data into a formula, forming a binary one-time equation set by any two formulas, screening the calculated coefficient and taking an average value to obtain values of alpha 1 and alpha 2 which are respectively 1.58 and 2.45;
the size of the coefficient is a specific numerical value obtained by quantizing each parameter, so that the subsequent comparison is convenient, and the size of the coefficient depends on the number of sample data and the corresponding life coefficient is preliminarily set for each group of sample data by a person skilled in the art; as long as the proportional relation between the parameter and the quantized value is not affected, for example, the life coefficient is inversely proportional to the value of the accumulated usage time.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (8)
1. The LED car lamp fault diagnosis feedback system comprises a processor, and is characterized in that the processor is in communication connection with a flicker detection module, a current analysis module, an overhaul recommendation module, a storage module and a service life early warning module;
the flicker detection module is used for detecting and analyzing the flicker condition of the vehicle lamp, judging the flicker level of the vehicle lamp according to the detection and analysis result, and sending the flicker level to the processor;
the processor receives the flicker level and then sends a current detection signal to the current analysis module, the current analysis module detects and analyzes the current of the car light circuit after receiving the current detection signal to obtain an abnormal curve, the coordinate values of the highest point and the lowest point of the abnormal curve are calculated to obtain a current transformation rate, and whether the current of the car light circuit is qualified or not is judged according to the comparison result of the current transformation rate and a current transformation threshold value;
the life early warning module is used for carrying out early warning analysis on the service life of the car lamp and obtaining a life coefficient, and judging whether the residual life of the car lamp meets the service requirement or not according to a comparison result of the life coefficient and a life threshold value;
the specific process of the flicker detection analysis comprises the following steps: when the car lamp works, the illumination intensity value of the car lamp is detected in real time through an illumination sensor arranged in the lamp, the illumination intensity collected by the illumination sensor is marked as light intensity, an illumination threshold value is obtained through a storage module, when the light intensity is lower than the illumination threshold value, the time when the light intensity is lower than the illumination threshold value is marked as a flicker time length, the flicker threshold value is obtained through the storage module, the flicker time length is compared with the flicker threshold value, and if the flicker time length is not smaller than the flicker threshold value, the flicker grade is judged to be a first grade; if the flicker duration is smaller than the flicker threshold, acquiring interval time when the light intensity is lower than the illuminance threshold continuously twice, and comparing the interval time with the interval threshold: if the interval time is smaller than the interval threshold value, judging the flicker level as a second level, and if the interval time is not smaller than the interval threshold value, judging the flicker level as a third level; the flicker detection module sends the flicker level to the processor;
the acquisition process of the abnormal curve comprises the following steps: when the car lamp works, the current value of a car lamp circuit is collected in real time through a current sensor, the car lamp working time is taken as an abscissa, the current value is taken as an ordinate, a rectangular coordinate system is established, a current curve is made in the rectangular coordinate system through the real-time current value of the car lamp circuit, a first intercept and a second intercept are made on the abscissa of the rectangular coordinate system, the first intercept and the second intercept are perpendicular to the abscissa of the rectangular coordinate system, a time constant o is set, the abscissa value of the intersection point of the first intercept and the X axis is marked as X1, the abscissa value of the intersection point of the second intercept and the X axis is marked as X2, x2=x1+o, and the initial value of X1 is zero; and synchronously moving the first and second stubs to the right, marking a current curve cut off by the first and second stubs as an analysis curve, acquiring coordinate values of the highest point and the lowest point of the analysis curve, marking the coordinate values as (DL 1, t 1) and (DL 2, t 2), marking a difference value between DL1 and DL2 as a current difference, acquiring a current threshold value through a storage module, comparing the current difference with the current threshold value, and obtaining an abnormal curve through a comparison result of the current difference and the current threshold value.
2. The LED lamp fault diagnosis feedback system of claim 1, wherein the comparison of the current difference to the current threshold comprises: if the current difference is smaller than the current threshold value, judging that the corresponding analysis curve is a normal curve; and if the current difference is not smaller than the current threshold value, marking the corresponding analysis curve as an abnormal curve.
3. The LED lamp fault diagnosis feedback system of claim 2, wherein the process of comparing the current transformation rate with the current transformation threshold comprises: if the current conversion rate is not less than the current conversion threshold, judging that the current of the car light circuit is unqualified, and sending a circuit fault signal to the processor by the current analysis module; if the current conversion rate is smaller than the current conversion threshold value, judging that the current of the car light circuit is qualified, and sending a hardware fault signal to the processor by the current analysis module.
4. The LED lamp fault diagnosis feedback system of claim 3, wherein the specific process of lamp life pre-warning analysis comprises: the accumulated service time of the car lamp is obtained and marked as LS, the unit is hours, the number of times that the processor receives the hardware fault signal is obtained and marked as YC, and the accumulated service time is calculated according to the formulaObtaining a service life coefficient SM of the car lamp, wherein alpha 1 and alpha 2 are proportionality coefficients, and alpha 2 is more than alpha 1 and more than 1; p is the number of times the processor receives the primary flicker signal.
5. The LED lamp fault diagnosis feedback system of claim 4, wherein the life threshold SMmin is obtained by the storage module, and the life coefficient SM of the lamp is compared with the life threshold SMmin: if the life coefficient SM is not smaller than the life threshold SMmin, judging that the residual life of the car lamp meets the use requirement, and sending a life qualified signal to a processor by a life early-warning module; if the life coefficient SM is smaller than the life threshold SMmin, the residual life of the car lamp is judged to not meet the use requirement, and the life early-warning module sends a life early-warning signal to the processor.
6. The LED lamp fault diagnosis feedback system of claim 5, wherein the processor receives the current fault signal, the hardware fault signal, or the life warning signal and then sends the current fault signal, the hardware fault signal, or the life warning signal to the service recommendation module, and the service recommendation module receives the current fault signal, the hardware fault signal, or the life warning signal and then recommends a service location for the vehicle owner.
7. The LED lamp fault diagnosis feedback system of claim 1, wherein the specific repair location recommendation process comprises: marking the current position of a vehicle as a maintenance site, drawing a circle by taking the maintenance site as a circle center and r as a radius, marking the obtained circular area as a screening area, acquiring all vehicle maintenance points in the screening area and marking the vehicle maintenance points as screening objects, acquiring the linear distance between the screening objects and the maintenance site and marking the linear distance as ZL, acquiring the number of incumbent persons of the screening objects and marking the number of incumbent persons as RS, and performing a formulaObtaining a recommendation coefficient TJ of a screening object, wherein gamma is a proportionality coefficient, screening three screening objects with highest values of the recommendation coefficient TJ as primary selection objects, marking the primary selection objects with shortest linear distance to a maintenance site as recommendation objects, and sending store information of the recommendation objects to a processor, wherein the store information of the recommendation objects comprises: the geographic location of the recommended store, the number of incumbents, the contact phones of the manager, and the recommendation coefficients.
8. An LED lamp fault diagnosis feedback system according to any of claims 1-7, characterized in that the operation of the LED lamp fault diagnosis feedback system comprises the steps of:
step one: the flicker detection module detects and analyzes the flicker condition of the vehicle lamp, judges the flicker level of the vehicle lamp according to the comparison result of the light intensity and the illuminance threshold value and the comparison result of the interval time and the interval threshold value, and sends the flicker level of the vehicle lamp to the processor;
step two: the processor receives the flicker level and then sends a current detection signal to the current analysis module, the current analysis module detects and analyzes the current of the car lamp circuit after receiving the current detection signal, a rectangular coordinate system is established, a current curve is drawn in the rectangular coordinate system, an abnormal curve is intercepted through a first intercept line and a second intercept line, current transformation rate calculation is carried out on the abnormal curve, the current transformation rate is compared with a current transformation threshold value, and whether the current of the car lamp circuit is qualified or not is judged according to a comparison result;
step three: the life early warning module calculates the life coefficient of the car lamp through the accumulated service time of the car lamp and the generation times of the hardware fault signals, and judges whether the residual life of the car lamp meets the service requirement or not through the comparison result of the life coefficient and the life threshold value.
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