Online detection device and control method suitable for large luminous size lamps

Abstract

The present invention discloses an online detection device and control method for large-sized luminaires. The detection device includes a host computer, a light transmission control module, an illumination detection and communication module, an alarm module, and a programmable power supply module. The light transmission control module is connected to the host computer and is used to control the light transmission range of the luminaire. The illumination detection and communication module is connected to the host computer and is used to detect the illumination value of the luminaire at a preset position. The alarm module is connected to the host computer and is used to display the detection results and issue an alarm. The programmable power supply module is connected to the host computer and is used to control the on / off of the luminaire. The present invention can measure luminaires with large luminaires within a limited device size and can also improve the accuracy of the detection results.

Description

Technical Field

[0001] The present invention relates to the field of optical detection technology, and in particular to an online detection device suitable for large-sized luminous lamps and a control method thereof. Background Art

[0002] Headlights illuminate the road at night and provide various driving signals. Headlights are generally categorized as headlights, taillights, and turn signals. All headlights undergo factory inspection to eliminate substandard products. Currently, optical testing equipment is primarily used to test the optical performance of headlights. High-quality optical testing equipment can improve both the accuracy and efficiency of test results.

[0003] There are two main difficulties in designing good optical inspection equipment:

[0004] First, the optical thermal attenuation coefficient of a lamp is generally measured under a stable optical illumination when complying with regulations. However, when tested with optical testing equipment, the optical performance of the lamp is unstable and still in a non-thermal equilibrium state. The illumination of the lamp at the test point will decay rapidly, resulting in the final measurement result of the testing equipment being inconsistent with the actual regulatory measurement result. To overcome this defect, an accurate conversion coefficient is required to convert the optical measurement value under the non-stable state to the optical measurement value under the stable state, thereby obtaining a relative measurement value.

[0005] Second, for automotive lamps, most regulations stipulate a measurement distance of 25m or 3.162m. However, due to the size limitations of the testing equipment, the measurement distance designed for the testing equipment is often smaller, resulting in large errors in the measurement results of the measuring lamps, especially for lamps with large luminous sizes. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to address the large errors in optical inspection results of lamps with large luminous dimensions using existing inspection equipment. This invention provides an online inspection device and control method for large luminous dimensions lamps. This device, while maintaining a limited device size, can measure lamps with large luminous dimensions and improve the accuracy of inspection results.

[0007] The technical solution adopted by the present invention to solve the technical problem is: an online detection device suitable for large-sized luminous lamps, comprising:

[0008] Host computer, and

[0009] A light transmission control module, connected to the host computer, for controlling the light transmission range of the lamp;

[0010] an illumination detection and communication module, connected to the host computer, for detecting the illumination value of the lamp at a preset position;

[0011] An alarm module, connected to the host computer, for displaying detection results and issuing an alarm;

[0012] A programmable power supply module is connected to the host computer and is used to control the lighting of the lamp.

[0013] Therefore, the light transmission area of ​​the lamp is changed through the light transmission control module, and the illuminance values ​​of different measurement points are collected through the illuminance detection and communication module and sent to the host computer. The host computer calculates the final regulatory illuminance value, and the illuminance value required by the regulations can be detected within a limited distance of the detection device. This not only simplifies the detection device, but also improves the detection accuracy.

[0014] Furthermore, the light control module includes:

[0015] A two-dimensional moving mechanism connected to the host computer;

[0016] A light shielding plate is connected to the two-dimensional moving mechanism, and the light shielding plate is provided with a light-transmitting area.

[0017] Furthermore, the length of the light-transmitting area is a, the width of the light-transmitting area is b, and the distance that the light-shielding plate moves each time is a, b, an integer multiple of a, or an integer multiple of b.

[0018] Furthermore, the illumination detection and communication module includes: an illumination detection unit, a data conversion unit and a communication unit. The illumination detection unit is used to detect the illumination value of the lamp, the data conversion unit is connected to the illumination detection unit, the data conversion unit is connected to the communication unit, and the communication unit is connected to the host computer.

[0019] Furthermore, there are multiple illumination detection units, and all of the multiple illumination detection units are connected to the data conversion unit.

[0020] Furthermore, the preset positions include n, and the illumination value of the lamp at the preset position is E n , then the legal illuminance value of the lamp finally detected is E=c1*E1+c2*E2+c3*E3+...+c n *E n , where c1~c n Indicates the weights of different preset positions.

[0021] The present invention also provides a control method for the online detection device, which is characterized by comprising the following steps:

[0022] S1. Setting output parameters of a programmable power module to light up the lamp via the programmable power module;

[0023] S2. Controlling the light transmission control module through the host computer to change the light transmission area of ​​the light beam emitted by the lamp so that the light beam is irradiated to different preset positions;

[0024] S3, detecting the illumination values ​​of the lamp at different preset positions through the illumination detection and communication module, and sending the illumination values ​​to the host computer;

[0025] S4. The host computer processes the illumination value to obtain the regulatory illumination value E of the lamp;

[0026] S5. The host computer determines the legal illumination value E. When the legal illumination value E does not meet the requirement, the host computer controls the alarm module to issue an alarm prompt.

[0027] Furthermore, the movement of the light shielding plate is controlled by a two-dimensional moving mechanism to change the position of the light-transmitting area.

[0028] Furthermore, during each detection, the illumination detection unit is arranged at the intersection C of the line A connecting the center point of the light-transmitting area and the actual test point at different positions and the measurement surface B.

[0029] Furthermore, the illumination detection unit is installed at the preset position.

[0030] The beneficial effect of the present invention is that the present invention changes the light-transmitting area of ​​the lamp through the light transmission control module, collects the illuminance values ​​of different measurement points through the illuminance detection and communication module and sends them to the host computer, and the host computer calculates the final regulatory illuminance value. Thus, the illuminance value required by the regulations can be detected within a limited distance of the detection device, which not only simplifies the detection device, but also improves the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below with reference to the accompanying drawings and examples.

[0032] Figure 1 It is a structural schematic diagram of the online detection device of the present invention.

[0033] Figure 2 It is a structural diagram of the illumination detection and communication module of the present invention.

[0034] Figure 3 It is a structural diagram of the alarm module of the present invention.

[0035] Figure 4 It is a schematic diagram of the measuring points of the present invention.

[0036] Figure 5 Schematic diagram of the movement of the light shielding plate of the present invention.

[0037] Figure 6 Schematic diagram of a detection embodiment of the present invention.

[0038] Figure 7 It is a schematic diagram of the detection process of the present invention.

[0039] Figure 8 is a flow chart of the control method of the present invention.

[0040] In the figure: 1. Host computer; 2. Light control module; 3. Lamp; 4. Illumination detection and communication module; 5. Alarm module; 6. Programmable power module; 7. Housing; 21. Two-dimensional moving mechanism; 22. Sunshade; 23. Light-passing area; 41. Illumination detection unit; 42. Data conversion unit; 43. Communication unit; 51. Display screen; 52. LED indicator light; 53. Sound alarm. DETAILED DESCRIPTION

[0041] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0044] like Figures 1 to 6 As shown, the online detection device for large-sized luminaires of the present invention includes: a host computer 1, a light transmission control module 2, a luminaire 3, an illumination detection and communication module 4, an alarm module 5 and a programmable power supply module 6. The light transmission control module 2 is connected to the host computer 1 for controlling the light transmission range of the luminaire 3. The illumination detection and communication module 4 is connected to the host computer 1 for detecting the illumination value of the luminaire 3 at a preset position. The alarm module 5 is connected to the host computer 1 for displaying the detection results and issuing an alarm. The programmable power supply module 6 is connected to the host computer 1 for regulating the on and off of the luminaire 3.

[0045] The present invention also includes a housing 7, a host computer 1, an illumination detection and communication module 4 and a programmable power supply module 6 are installed inside the housing 7, a lamp 3 is arranged on the housing 7 and is located outside the housing 7, a light control module 2 is installed on the housing 7, and an alarm module 5 is arranged on the housing 7.

[0046] The present invention adopts a direct measurement method. By changing the measurement point of the lamp 3 through the light control module 2, the performance of lamps with large luminous sizes can be measured in the detection device. The measurement results are accurate, the device structure is simple, the installation is convenient, and it is more economical. It also eliminates the need for a dark box, lens, and ideal diffuse reflection coating layer, and does not require calibration, which can simplify the detection process.

[0047] The light control module 2 includes a two-dimensional moving mechanism 21 and a light shielding plate 22. The two-dimensional moving mechanism 21 is connected to the host computer 1, and the light shielding plate 22 is connected to the two-dimensional moving mechanism 21. The light shielding plate 22 has a light-transmitting area 23. The two-dimensional moving mechanism 21 can be fixed to the housing 7, for example, by screws. The light shielding plate 22 is located directly in front of the lamp 3 and is used to select the test position of the lamp 3. The light shielding plate 22 has a light-transmitting area 23, while the remaining area is opaque. Only the light-transmitting area 23 allows light from the lamp 3 to pass through. The two-dimensional moving mechanism 21 can move the light shielding plate 22 in the xy plane, thereby changing the position of the light-transmitting area 23 and enabling illumination measurement at different points on the lamp 3. The light-transmitting area 23 can be, for example, rectangular, square, or circular. Taking a rectangle as an example, let the length of the light-transmitting area 23 be a and the width be b. The distance that the light shielding plate 22 moves each time is a, b, an integer multiple of a, or an integer multiple of b. For example, the dimensions of the light-transmitting area 23 are 3 cm by 3 cm, and the preset positions (i.e., measurement points) are set as P1 to P9, arranged in a 3 by 3 array. The light-transmitting area 23 moves sequentially from P1 to P9, and the displacement of the light-shielding plate 22 each time is equal to one of a, b, an integer multiple of a, or an integer multiple of b. This ensures that the light-transmitting areas 23 do not overlap during multiple measurements. If the light-transmitting areas 23 overlap during each test, it indicates that the light emitted by the lamp 3 is being measured repeatedly, and the final test result will not match the actual light emission of the lamp 3. The non-overlapping light-transmitting areas 23 ensure that the sum of the measurement results is equal to the measurement value when the lamp 3 is not blocked, thus ensuring the accuracy of the test results.

[0048] The illumination detection and communication module 4 includes an illumination detection unit 41, a data conversion unit 42, and a communication unit 43. The illumination detection unit 41 is used to detect the illumination value of the lamp 3. The data conversion unit 42 is connected to the illumination detection unit 41, which is in turn connected to the communication unit 43. The communication unit 43 is connected to the host computer 1. The illumination detection unit 41 is installed at the measurement point. The illumination detection unit 41 can sense light signals and convert them into electrical signals, which are sent to the data conversion unit 42. The data conversion unit 42 can convert the analog signals sent by the illumination detection unit into digital signals that can be received by the host computer 1. The communication unit 43 then sends the digital signals to the host computer 1. The illumination detection unit 41 and the data conversion unit 42 can be connected by a wiring harness. One data conversion unit 42 can be connected to multiple illumination detection units 41 at the same time. The number of illumination detection units 41 can be the same as the number of measurement points. The illumination detection unit 41 can also be equipped with a light guide structure to facilitate the collection of light signals.

[0049] For example, the alarm module 5 includes a display screen 51, an LED indicator light 52, and an audible alarm 53, all of which are connected to the host computer 1. After receiving the measurement data from the lamp 3, the host computer 1 can make real-time judgments. The display screen 51 can display the relevant measurement parameters, measurement values, and qualification results. When the lamp 3 is judged to be qualified, the LED indicator light 52 turns green. When the lamp 3 is judged to be unqualified, the LED indicator light 52 turns red, and the audible alarm 53 sounds an alarm. This allows staff to intuitively understand the test results of each lamp 3 and screen out defective products.

[0050] There are n preset positions. Assume that the illumination value of lamp 3 at the preset position is E n , then the final legal illuminance value of lamp 3 obtained by detection is E=c1*E1+c2*E2+c3*E3+...+c n *E n , where c1~c n Indicates the weight of different preset positions. For example, taking P1 to P9 as an example, n=9, each preset position can collect an illumination value E n , that is, we can obtain E1 to E9. The final calculated regulatory illuminance value is E = c1*E1 + c2*E2 + c3*E3 + ... + c9*E9. The values ​​of c1 to c9 are related to the distance between the corresponding preset position and the regulatory measurement point. Finally, the quality of lamp 3 is determined based on the regulatory illuminance value E.

[0051] It should be noted that since the light-transmitting area 23 is movable, it effectively divides the light emitted by the lamp 3 into multiple segments, each of which can be measured to obtain an illuminance value. Furthermore, since each movement of the light-transmitting area 23 does not overlap, the multiple illuminance values ​​can be linearly superimposed to obtain the final regulatory illuminance value for the lamp 3. Since the light emitted by automotive lamps can be considered incoherent, the total intensity of the light beam emitted by the lamp is equal to the sum of the intensities of the individual beams.

[0052] As mentioned in the background technology, the test distance for automotive lights is generally 3.162m for taillights or signal lights. For headlights, the test distance must be at least 10m to avoid measurement errors caused by the large opening size of the lamp. It can generally be set to 25m. This results in the need for a very large test site during actual testing. The technical solution of the present invention, however, uses a partitioned measurement method to reduce the light aperture and measurement distance by a certain proportion, and then superimpose the measurement results to obtain the final test result. In this way, the optical performance of lamp 3 can be tested on smaller testing equipment, which also improves detection efficiency.

[0053] In other words, the present invention obtains multiple sets of measurement data by varying the position of the light-transmitting area 23. Finally, each set of data is multiplied by a weight and summed to obtain an accurate, regulatory-compliant measurement value for the lamp, thereby detecting defective lamps. This invention enables optical performance testing of large-sized lamps within a limited distance, while also improving the accuracy of test results.

[0054] like Figure 7 As shown, the present invention also provides a control method for an online detection device, comprising the following steps:

[0055] S1. Set the output parameters of the programmable power module 6 and light the lamp 3 through the programmable power module 6.

[0056] S2. The host computer 1 controls the light control module 2 to change the light transmission area of ​​the light beam emitted by the lamp 3 so that the light beam is irradiated to different preset positions.

[0057] S3 , detecting the illumination values ​​of the lamp 3 at different preset positions through the illumination detection and communication module 4 , and sending the illumination values ​​to the host computer 1 .

[0058] S4 , the host computer 1 processes the illuminance value to obtain the legal illuminance value E of the lamp 3 .

[0059] S5. The host computer 1 determines the legal illumination value E. When the legal illumination value E does not meet the requirement, the host computer 1 controls the alarm module 5 to issue an alarm.

[0060] It should be noted that the host computer 1 can set the output parameters of the programmable power module 6 (e.g., voltage value, current upper limit, etc.). Before testing the lamp 3, the host computer 1 controls the illumination detection and communication module 4 to collect and save background light illumination data at different measurement points. If an error occurs during data reception, the host computer 1 recollects the data. After collecting the background data, the host computer 1 turns on the programmable power module 6 to power the lamp 3, which then emits a light beam that is projected onto the screen (where the measurement points are located).

[0061] For example, the movement of the light shielding plate 22 is controlled by the two-dimensional moving mechanism 21 to change the position of the light-transmitting area 23. The illuminance detection unit 41 is installed at a preset position. During each test, the illuminance detection unit 41 is arranged at the intersection C of the line A connecting the center point of the light-transmitting area 23 at different positions and the actual test point O, and the measuring surface B. Since the light beam emitted by the lamp 3 is conical, when the light-transmitting area 23 is at different positions, the light that can pass through the light-transmitting area 23 of the lamp 3 is different, and the divergence angle is also different. Therefore, in order to reduce measurement errors and improve detection accuracy, the illuminance detection unit 41 is arranged at the intersection C.

[0062] The technical effect of this embodiment is described below by taking the (H, V) point illuminance of a reflective high beam lamp with a light-emitting surface size of 10 cm*10 cm as an example.

[0063] Regulations for optical testing of high-beam headlights require that measurements be performed at a distance of 25 meters between the lamp and the measuring equipment. Due to the limited size of the equipment in this embodiment, the light transmission control module 2 of the present invention modifies the light transmission area of ​​lamp 3, reducing the size of the light emitted by lamp 3 during each measurement to improve measurement accuracy. An illuminance detection unit 41 is positioned at the intersection C of the line A connecting the center of light transmission area 23 and the actual test point, and the measurement surface B. The light transmission control module 2 is moved nine times, resulting in nine intersections. Each measurement point is equipped with an illuminance detection unit 41, resulting in measured illuminance values ​​E1 to E9. Finally, the final regulatory illuminance value E (H, V) at 25 meters is calculated using the formula.

[0064] For example, the illuminance values ​​obtained from 9 measurements are 7954lx, 7182lx, 7937lx, 7326lx, 16469lx, 16481lx, 2300lx, 1838lx, and 3196lx. Since the measurement surface is a plane and the vertical distance between it and lamp 3 is 1m, c1 to c9 are all equal to 1 / 625 (i.e., 1 / 25 2 , the illuminance value is inversely proportional to the square of the distance). The final calculated legal illuminance value is 113.08 lx.

[0065] Using the Lucidshape platform for simulation, the high-beam spot illumination at 25 meters (H, V) is 119.3 lx (realistic value). However, without the light control module 2, the spot illumination of lamp 3 at 1 meter (H, V) is 71.4 lx (existing solution).

[0066] From this, we can calculate that the error in the measurement results of the prior art device is: (119.3lx - 71.4lx) / 119.3lx = 40.1%; while the error in the measurement results of the solution of this application is: (119.3lx - 113.08lx) / 119.3lx = 5.21%. This shows that compared with the prior art, the detection device and detection method of the present invention can significantly reduce measurement error and improve the accuracy of detection results.

[0067] In summary, the present invention changes the light transmission area of ​​the lamp 3 through the light transmission control module 2, collects the illuminance values ​​at different measurement points through the illuminance detection and communication module 4 and sends them to the host computer 1. The host computer 1 calculates the final regulatory illuminance value. As a result, the illuminance value at 25m required by the regulations can be detected within a limited distance (e.g., 1 meter) of the detection device. This not only simplifies the detection device but also improves detection accuracy. In addition, the present method adopts a direct measurement method, eliminating the arrangement of a dark box, lens, and ideal diffuse reflection coating layer, further simplifying the operation process, making the structure simpler, more convenient to use, and more economical. It also does not require calibration and has high application value.

[0068] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical spirit of this invention. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An online detection device suitable for large luminous size lamps, characterized in that: include: Host computer (1), and A light transmission control module (2), the light transmission control module (2) being connected to the host computer (1) and being used to control the light transmission range of the lamp (3); an illumination detection and communication module (4), the illumination detection and communication module (4) being connected to the host computer (1) and being used to detect the illumination value of the lamp (3) at a preset position; An alarm module (5), the alarm module (5) being connected to the host computer (1) and being used for displaying detection results and issuing an alarm; A programmable power supply module (6), the programmable power supply module (6) being connected to the host computer (1) and being used for regulating the on and off of the lamp (3); A two-dimensional moving mechanism (21), the two-dimensional moving mechanism (21) being connected to the host computer (1); A light shielding plate (22), the light shielding plate (22) being connected to the two-dimensional moving mechanism (21), and the light shielding plate (22) being provided with a light-transmitting area (23); The illumination detection and communication module (4) comprises: an illumination detection unit (41), a data conversion unit (42) and a communication unit (43); the illumination detection unit (41) is used to detect the illumination value of the lamp (3); the data conversion unit (42) is connected to the illumination detection unit (41); the data conversion unit (42) is connected to the communication unit (43); and the communication unit (43) is connected to the host computer (1); The preset positions include n, and the illumination value of the lamp (3) at the preset position is , then the legal illuminance value of the lamp (3) obtained by the final test is E=c1*E1+c2*E2+c3*E3+...+c n *E n , where c1~c n Indicates the weights of different preset positions.

2. The online detection device according to claim 1, characterized in that: The length of the light-transmitting area (23) is a, the width of the light-transmitting area (23) is b, and the distance that the light-shielding plate (22) moves each time is a, b, an integer multiple of a, or an integer multiple of b.

3. The online detection device according to claim 1, characterized in that: There are multiple illumination detection units (41), and each of the multiple illumination detection units (41) is connected to the data conversion unit (42).

4. A control method for an online detection device according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1, setting output parameters of a programmable power module (6), and lighting the lamp (3) via the programmable power module (6); S2, controlling the light transmission control module (2) through the host computer (1) to change the light transmission area of ​​the light beam emitted by the lamp (3), so that the light beam is irradiated to different preset positions; S3, detecting the illumination values ​​of the lamp (3) at different preset positions through the illumination detection and communication module (4), and sending the illumination values ​​to the host computer (1); S4, the host computer (1) processes the illumination value to obtain the legal illumination value E of the lamp (3); S5, the host computer (1) judges the legal illumination value E. When the legal illumination value E does not meet the requirement, the host computer (1) controls the alarm module (5) to issue an alarm prompt.

5. The control method of the online detection device according to claim 4, characterized in that: The movement of the light shielding plate (22) is controlled by a two-dimensional moving mechanism (21) to change the position of the light-transmitting area (23).

6. The control method of the online detection device according to claim 5, characterized in that: During each test, the illumination detection unit (41) is arranged at the intersection C of the line A connecting the center point of the light-transmitting area (23) at different positions and the actual test point O and the measurement surface B.

7. The control method of the online detection device according to claim 6, characterized in that: The illumination detection unit (41) is installed at the preset position.

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