CN115684201A - Device and method for on-line detection of optical performance of lamp - Google Patents
Device and method for on-line detection of optical performance of lamp Download PDFInfo
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Abstract
The invention discloses a device and a method for detecting the optical performance of a lamp on line, wherein the device comprises: the programmable power supply is used for controlling the on and off of the lamp; the detection module is used for detecting the illumination of the lamp; the control module is connected with the programmable power supply and the detection module; and the display alarm module is connected with the control module and used for displaying the detection result and giving an alarm. The invention can realize the accurate online detection of the illumination of the lamp, judge whether the requirements of regulations are met or not, and improve the detection accuracy of the lamp with poor optics in the production process.
Description
Technical Field
The invention relates to the technical field of lamp detection, in particular to a device and a method for detecting optical performance of a lamp on line.
Background
The vehicle lamp is a tool for illuminating the road when the vehicle runs at night, and is also a prompting tool for sending various vehicle running signals. The lamps are generally classified into head lamps, tail lamps, turn lamps, and the like. In manufacturing an automobile lamp, it is necessary to detect optical properties (for example, brightness uniformity of a light source, mounting accuracy of the light source, mounting accuracy of a reflector, an aluminum plating process of the reflector, and the like) of the automobile lamp to ensure that the lamp can correctly irradiate a desired area during night driving. Therefore, it is necessary to introduce a detection device to control the optical performance of the lamp and detect the defective lamp so as to avoid flowing out of the factory.
The existing detection method for the illumination of the lamp mostly adopts a relative measurement method. The method specifically comprises the steps of reducing the size of a light spot of the lamp by using a ball lens or a Fresnel lens, irradiating the light spot on an ideal diffuse reflection substance, then photographing the light spot by using an industrial camera, and finally calibrating by using an illumination value actually measured by the lamp and an illumination value of the camera to achieve the purpose of lamp testing. However, the values obtained by the relative measurement method are very inaccurate, mainly result from the introduction of the lens, which affects the illuminance distribution of the lamp, the deviation is very large, the requirement of accurately screening unqualified lamps cannot be met, and the method needs to be calibrated again for lamps with different designs, so the operation process is very complicated.
Disclosure of Invention
The invention aims to solve the technical problem of (2) is that: in order to solve the technical problems of inaccurate detection results and complex operation of the existing detection method, the invention provides the device and the method for detecting the optical performance of the lamp on line, which can simplify the operation steps and improve the accuracy and the reliability of the detection results.
The technical scheme adopted by the invention for solving the technical problems is as follows: an on-line detection device for optical performance of a lamp comprises:
the programmable power supply is connected with the lamp and used for controlling the on and off of the lamp;
the detection module is used for detecting the illumination of the lamp;
the control module is connected with the programmable power supply and the detection module;
and the display alarm module is connected with the control module and used for displaying the detection result and giving an alarm.
Furthermore, the detection module comprises at least one illuminance sensing module, a data processing module and a communication module, the illuminance sensing module is used for detecting the illuminance of the lamp, the data processing module is connected with the illuminance sensing module, the communication module is connected with the data processing module, and the communication module is connected with the control module.
Further, the method also comprises the following steps: and the manipulator is connected with the illumination sensing module and can drive the illumination sensing module to move.
Further, the method also comprises the following steps: the illumination sensing module is installed on the two-dimensional moving platform, and the two-dimensional moving platform can drive the illumination sensing module to move.
Furthermore, the illumination sensing modules are multiple and are respectively fixed on different points to be detected.
Further, the display alarm module comprises: display screen, LED pilot lamp and audible alarm ware, display screen, LED pilot lamp and audible alarm ware all with control module connects.
The invention also provides a lamp optical performance online detection method, which adopts a lamp optical performance online detection device and comprises the following steps:
s1, placing a lamp to be detected at a specified position, and connecting the lamp to be detected with a programmable power supply;
s2, the control module controls the detection module to collect and store background illumination data;
s3, the control module turns on a programmable power supply to supply power to the lamp, and the detection module collects multiple groups of measured illuminance values of different point positions of the lamp and sends the values to the control module;
s4, the control module closes the programmable power supply and processes the collected multiple groups of measured illumination values to obtain stable illumination values;
and S5, comparing the stable illumination value with a standard value, judging that the lamp is qualified if the difference value of the stable illumination value and the standard value is within an error range, and judging that the lamp is unqualified if the difference value is not within the error range.
Further, the processing of the collected multiple groups of measurement illuminance values to obtain a stable illuminance value specifically includes:
subtracting the background illumination data from the obtained measurement illumination value to obtain a new measurement illumination value;
calculating the actual attenuation speed of the new measured illumination value, and performing least square fitting on the actual attenuation speed and the standard attenuation speed stored in the control module to obtain the ratio of the new measured illumination value to the stable illumination value;
and converting the new measured illumination value into a stable illumination value according to the ratio.
Furthermore, when the number of the illumination sensing modules is one, the measurement point positions of the illumination sensing modules are changed through the manipulator, and multi-point position measurement of the lamp is achieved.
Furthermore, when the number of the illumination sensing modules is one, the measuring point positions of the illumination sensing modules are changed through the two-dimensional moving platform, and multi-point position measurement of the lamp is achieved.
The device and the method for detecting the optical performance of the lamp on line have the advantages that a direct measurement method is adopted, the arrangement of a lens, a dark box and an ideal diffuse reflection coating layer is omitted, interference factors during measurement can be reduced, distortion influence caused by the lens is eliminated, and the accuracy and the reliability of a detection result can be improved. Moreover, the device has simple structure and convenient operation, does not need to repeatedly calibrate the standard, and can improve the detection efficiency.
Drawings
The invention is further illustrated by the following examples in conjunction with the drawings.
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the detection module of the present invention.
Fig. 3 is a schematic structural diagram of a display alarm module of the present invention.
Fig. 4 is a schematic diagram of the distribution of measurement points according to the present invention.
Fig. 5 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a third embodiment of the present invention.
FIG. 7 is a flow chart of a fourth embodiment of the present invention.
Fig. 8 is a flow chart of a fifth embodiment of the present invention.
FIG. 9 is a flow chart of a sixth embodiment of the present invention.
In the figure: 100. a light fixture; 1. a programmable power supply; 2. a detection module; 3. a control module; 4. a display alarm module; 5. a manipulator; 6. a two-dimensional moving platform; 7. a housing; 8. transparent stripping; 21. an illuminance sensing module; 22. a data processing module; 23. a communication module; 41. a display screen; 42. an LED indicator light; 43. an audible alarm.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
As shown in fig. 1 to 4, the device for detecting optical performance of a lamp in this embodiment includes: programmable power supply 1, detection module 2, control module 3 and demonstration alarm module 4, programmable power supply 1 is used for controlling the bright of lamps and lanterns 100 and goes out, and detection module 2 is used for detecting the illuminance of lamps and lanterns 100, and control module 3 is connected with programmable power supply 1, and control module 3 is connected with detection module 2, and demonstration alarm module 4 is connected with control module 3, and demonstration alarm module 4 is used for showing the testing result and sending out the police dispatch newspaper. The detection device of the embodiment adopts a direct measurement method to detect the lamp, so that a dark box, a lens and an ideal diffuse reflection coating layer are omitted, distortion influence caused by the lens is eliminated, light spots of the lamp are more consistent with real conditions, and the detection accuracy is improved; moreover, the operation process is simpler, repeated calibration of the calibration standard is not needed, and the detection efficiency can be improved.
The embodiment further comprises a machine shell 7, wherein the programmable power supply 1, the detection module 2, the control module 3 and the display alarm module 4 are all arranged on the machine shell 7, for example, the programmable power supply 1 and the control module 3 can be fixed through screws, and the detection module 2 can be fixed through a hoop and the like. The housing 7 is made of an opaque material, for example, a transparent glass 8 may be disposed on the housing 7 at a position close to the lamp 100, and the transparent glass 8 may block external dust from entering the housing 7.
The detection module 2 includes at least one illuminance sensing module 21, a data processing module 22 and a communication module 23, the illuminance sensing module 21 is used for detecting illuminance of the lamp 100, the data processing module 22 is connected with the illuminance sensing module 21, the communication module 23 is connected with the data processing module 22, and the communication module 23 is connected with the control module 3. In this embodiment, a plurality of illumination sensing modules 21 are respectively fixed on different points to be measured. It should be noted that the light beam emitted by the lamp 100 is conical, the light beam projected on a plane can form a circular light spot, and when performing illuminance detection, data of different point locations on the light spot needs to be detected, for example, as shown in the figure, the figure is a schematic diagram of illuminance detection point locations, the point locations to be detected are five, and are respectively denoted as point a, point B, point C, point D, and point O, point O is a central point of the light beam of the lamp 100, point a and point C respectively represent projection points of light rays which are deviated from the central line of the light beam by 5 ° up and down, and point B and point D respectively represent projection points of light rays which are deviated from the central line of the light beam by 10 ° left and right. That is to say, in this embodiment, the illumination sensing modules 21 (for example, illuminometers) are disposed at the points to be measured, each illumination sensing module 21 may communicate with the data processing module 22, the illumination sensing module 21 sends the collected measurement illuminance value to the data processing module 22 for processing, and the processed measurement data and the data processing module 22 may send the measurement illuminance value to the control module 3 through the communication module 23. The control module 3 is, for example, an upper computer, the illuminance sensing module 21 may sense an optical signal and convert the optical signal into illuminance data (analog quantity), and the data processing module 22 may convert the analog quantity into a digital quantity and send the digital quantity to the control module 3. The illumination sensing module 21 can be additionally provided with a light guide structure, so that light signals can be collected conveniently, and the size of the module can be further reduced.
The display alarm module 4 includes: display screen 41, LED pilot lamp 42 and audible alarm 43, display screen 41, LED pilot lamp 42 and audible alarm 43 all are connected with control module 3. The control module 43 can perform real-time judgment after receiving the measurement data of the lamp 100, and the display screen 41 can display relevant measurement parameters, measurement values and qualification judgment results; when the lamp determination result is qualified, the LED indicator lamp displays green, and when the lamp determination result is unqualified, the LED indicator lamp displays red, and the audible alarm 43 sounds an alarm. Thus, the worker can visually know the detection result of each lamp 100 and select the defective products.
In summary, the detection apparatus of the present embodiment adopts a direct measurement method, which omits components such as a lens required by a relative measurement method, reduces factors affecting inaccurate detection results, and improves accuracy of the detection results. The error of the detection result obtained by adopting a relative measurement method is about 20 percent, while the error of the detection result obtained by adopting the detection device of the application is reduced to about 8 percent, so that the detection error is obviously reduced, and the accuracy and the reliability of the detection result are improved.
Example two
As shown in fig. 5, the difference between the present embodiment and the first embodiment is that the number of the adopted illuminance sensing modules 21 is one, the illuminance sensing module 21 is connected to the manipulator 5, the manipulator 5 is installed on the housing 7, and the manipulator 5 can drive the illuminance sensing module 21 to move to different positions to be measured to acquire illuminance data. The robot 5 is powered by an external power supply.
In the present embodiment, the number of the illuminance sensing modules 21 is reduced to one, and the measurement direction of the illuminance sensing module 21 is controlled by the manipulator 5, so that the detection cost can be saved, and more data of different point positions can be measured.
EXAMPLE III
As shown in fig. 6, the difference between the present embodiment and the first embodiment is that the number of the adopted illuminance sensing modules 21 is one, the illuminance sensing module 21 is installed on the two-dimensional moving platform 6, and the two-dimensional moving platform 6 can drive the illuminance sensing module 21 to move to different points to be measured. For example, the two-dimensional moving platform 6 includes an X-direction moving mechanism and a Y-direction moving mechanism, the illuminance sensing module 21 may be installed on the X-direction moving mechanism, the X-direction moving mechanism is installed on the Y-direction moving mechanism, and the two-dimensional moving platform 6 may drive the illuminance sensing module 21 to move to the point to be detected to continue the detection.
In this embodiment, the number of the illuminance sensing modules 21 is reduced to one, and the two-dimensional moving platform 6 is used to control the measurement direction of the illuminance sensing modules 21, so that the detection cost can be saved, and more data of different point locations can be measured.
Example four
As shown in fig. 7, the present embodiment provides an online detection method for optical performance of a lamp, which uses the online detection device for optical performance of a lamp according to the first embodiment. The method comprises the following steps:
step S1, placing the lamp 100 to be detected at a specified position, and connecting the lamp 100 to be detected with the programmable power supply 1.
And S2, the control module 3 controls the detection module 2 to collect and store background illumination data.
And S3, the control module 3 turns on the programmable power supply 1 to supply power to the lamp 100, and the detection module 2 collects multiple groups of measurement illumination values of different point positions of the lamp 100 and sends the values to the control module 3.
And S4, the control module 3 closes the programmable power supply 1 and processes the collected multiple groups of measured illumination values to obtain stable illumination values.
And S5, comparing the stable illumination value with a standard value, if the difference value of the stable illumination value and the standard value is within an error range, judging that the lamp 100 is qualified, otherwise, judging that the lamp is unqualified.
It should be noted that the control module 3 may set an output parameter (e.g., a voltage value, a current upper limit value, etc.) of the programmable power supply 1. Before detecting the lamp, the control module 3 controls the illuminance sensing module 21 to collect and store the background illuminance data of different point locations, and if the control module 3 receives the data with errors, the data is collected again. After the background data is collected, the control module 3 turns on the programmable power supply 1 to supply power to the lamp 100, and the lamp 100 emits a light beam to be projected on a screen. At this time, the control module 3 may control the different illumination sensing modules 21 to collect the measurement illumination values of different points to be measured, continuously collect 20 groups of data for each point, and send all the collected data to the data processing module 22. The data processing module 22 converts the collected measured illuminance value and sends the converted value to the control module 3.
The method for obtaining the stable illumination value after processing the collected multiple groups of measurement illumination values specifically comprises the following steps: and subtracting the background illumination data from the obtained measurement illumination value to obtain a new measurement illumination value. And calculating the actual attenuation speed of the new measured illumination value, and performing least square fitting on the actual attenuation speed and the standard attenuation speed stored in the control module 3 to obtain the ratio of the new measured illumination value to the stable illumination value. And converting the new measured illumination value into a stable illumination value according to the ratio. That is, after receiving the measured illumination values, the control module 3 subtracts the background illumination data from each set of measured illumination values to obtain new measured illumination values. Then, the attenuation speed of 20 groups of data of each point location is calculated (the sampling time is fixed, the attenuation speed is equal to the difference value between two adjacent data of the same point location), the calculated attenuation speed and the standard attenuation speed (obtained by measuring and calculating a standard lamp in a darkroom) stored in the control module 3 are subjected to least square fitting, the ratio between a new measured illuminance value and a stable illuminance value can be obtained, and then the stable illuminance value corresponding to the new measured illuminance value is converted through the ratio. And comparing the stable illuminance value with the standard value to judge whether the lamp 100 is qualified. If the difference between the stable illuminance value and the standard value is within the error range, the lamp 100 is determined to be qualified; otherwise, the test piece is judged to be unqualified.
EXAMPLE five
As shown in fig. 8, the difference between the present embodiment and the fourth embodiment is that the detection device of the second embodiment is adopted, the number of the illuminance sensing modules 21 in the present embodiment is one, and when the detection module 2 collects multiple sets of measured illuminance values at different points of the lamp 100, the manipulator 5 changes the measurement points of the illuminance sensing modules 21 to realize multi-point position measurement of the lamp 100. For example, the manipulator 5 moves the illuminance sensing module 21 to the point a, continuously acquires 20 sets of measurement data of the point a, then the manipulator 5 drives the illuminance sensing module 21 to move to the point B, continuously acquires 20 sets of measurement data of the point B, and so on, and the manipulator 5 drives one illuminance sensing module 21 to implement multi-point measurement.
EXAMPLE six
As shown in fig. 9, the difference between the present embodiment and the fourth embodiment is that the detection device of the third embodiment is adopted, the number of the illuminance sensing modules 21 of the present embodiment is one, and when the detection module 2 collects multiple sets of measured illuminance values of different points of the lamp 100, the two-dimensional moving platform 6 changes the measurement points of the illuminance sensing modules 21, so as to implement multi-point measurement on the lamp 100. For example, the two-dimensional moving platform 6 drives the illuminance sensing module 21 to move to the point a, 20 groups of measurement data of the point a are continuously collected, then the two-dimensional moving platform 6 moves the illuminance sensing module 21 to the point B, 20 groups of measurement data of the point B are continuously collected, and so on, the two-dimensional moving platform 6 drives one illuminance sensing module 21 to realize multi-point measurement.
In summary, the device and the method for detecting the optical performance of the lamp on line adopt a direct measurement method, save the arrangement of a lens, a dark box and an ideal diffuse reflection coating layer, reduce interference factors during measurement, eliminate distortion influence caused by the lens, and improve the accuracy and reliability of a detection result. Moreover, the device has simple structure and convenient operation, does not need to repeatedly calibrate the standard, and can improve the detection efficiency.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined by the scope of the claims.
Claims (10)
1. The utility model provides a lamps and lanterns optical property on-line measuring device which characterized in that includes:
the programmable power supply (1), the programmable power supply (1) is connected with the lamp (100) and is used for controlling the on and off of the lamp (100);
the detection module (2), the detection module (2) is used for detecting the illumination of the lamp (100);
the control module (3), the said control module (3) is connected with said programmable power supply (1), the said control module (3) is connected with said detection module (2);
and the display alarm module (4) is connected with the control module (3) and is used for displaying the detection result and giving an alarm.
2. The device for on-line detection of optical performance of a lamp as claimed in claim 1, wherein the detection module (2) comprises at least one illuminance sensing module (21), a data processing module (22) and a communication module (23), the illuminance sensing module (21) is configured to detect illuminance of the lamp (100), the data processing module (22) is connected to the illuminance sensing module (21), the communication module (23) is connected to the data processing module (22), and the communication module (23) is connected to the control module (3).
3. The on-line detection device for optical performance of lamp as claimed in claim 2, further comprising: the manipulator (5), manipulator (5) with illuminance sensing module (21) are connected, manipulator (5) can drive illuminance sensing module (21) remove.
4. The on-line detection device for optical performance of lamp as claimed in claim 2, further comprising: the illumination device comprises a two-dimensional moving platform (6), wherein the illumination sensing module (21) is installed on the two-dimensional moving platform (6), and the two-dimensional moving platform (6) can drive the illumination sensing module (21) to move.
5. The on-line detection device for optical performance of lamp as claimed in claim 2, wherein the illumination sensing modules (21) are plural and are respectively fixed at different points to be detected.
6. The lamp optical performance online detection device according to claim 1, characterized in that the display alarm module (4) comprises: display screen (41), LED pilot lamp (42) and audible alarm (43), display screen (41), LED pilot lamp (42) and audible alarm (43) all with control module (3) are connected.
7. An on-line detection method for optical performance of a lamp, which is characterized by adopting the on-line detection device for optical performance of the lamp according to any one of claims 1 to 6, and comprises the following steps:
s1, placing a lamp (100) to be detected at a specified position, and connecting the lamp (100) to be detected with a programmable power supply (1);
s2, the control module (3) controls the detection module (2) to collect and store background illumination data;
s3, the control module (3) turns on the programmable power supply (1) to supply power to the lamp (100), and the detection module (2) collects multiple groups of measurement illuminance values of different point positions of the lamp (100) and sends the measurement illuminance values to the control module (3);
s4, the control module (3) closes the programmable power supply (1) and processes the collected multiple groups of measurement illumination values to obtain stable illumination values;
and S5, comparing the stable illumination value with a standard value, judging that the lamp (100) is qualified if the difference value of the stable illumination value and the standard value is within an error range, and judging that the lamp is unqualified if the difference value is not within the error range.
8. The method for on-line detection of optical performance of a lamp as claimed in claim 7, wherein processing the collected multiple sets of measured illuminance values to obtain stable illuminance values comprises:
subtracting the background illumination data from the obtained measurement illumination value to obtain a new measurement illumination value;
calculating the actual attenuation speed of the new measured illumination value, and performing least square fitting on the actual attenuation speed and the standard attenuation speed stored in the control module (3) to obtain the ratio of the new measured illumination value to the stable illumination value;
the new measured illumination value is converted to a stable illumination value based on the ratio.
9. The on-line detection method for the optical performance of the lamp as claimed in claim 1, wherein when the number of the illuminance sensing modules (21) is one, the measurement point positions of the illuminance sensing modules (21) are changed by the manipulator (5) to realize multi-point position measurement of the lamp (100).
10. The on-line detection method for the optical performance of the lamp as claimed in claim 1, wherein when the number of the illuminance sensing modules (21) is one, the measurement point positions of the illuminance sensing modules (21) are changed by the two-dimensional moving platform (6), so as to realize multi-point position measurement of the lamp (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211322770.9A CN115684201A (en) | 2022-10-27 | 2022-10-27 | Device and method for on-line detection of optical performance of lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211322770.9A CN115684201A (en) | 2022-10-27 | 2022-10-27 | Device and method for on-line detection of optical performance of lamp |
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| CN115684201A true CN115684201A (en) | 2023-02-03 |
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| CN202211322770.9A Withdrawn CN115684201A (en) | 2022-10-27 | 2022-10-27 | Device and method for on-line detection of optical performance of lamp |
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Application publication date: 20230203 |