Luminous flux detection device of lamp and stage lamp

Abstract

The utility model relates to the technical field of stage lamps, in particular to a luminous flux detection device of a lamp and the stage lamp, and the luminous flux detection device structurally comprises a heat absorbing body which is arranged in the lamp; the driving mechanism is in transmission connection with the heat absorbing body and is used for driving the heat absorbing body to enter / exit from the irradiation range of the light source beams, and the heat absorbing body absorbs heat of the light source when entering the irradiation range of the light source beams; the plurality of temperature probes are arranged and distributed on the heat absorbing body; wherein each temperature probe detects the temperature of each area of the heat absorbing body, and the control system calculates the luminous flux of the light source according to the temperature data fed back by each temperature probe. According to the luminous flux detection device of the lamp and the stage lamp, a control system in the lamp can conveniently detect the luminous flux, and maintenance personnel can timely find the luminous flux change condition of the lamp.

Description

Technical Field

[0001] The utility model relates to the technical field of stage lamps, in particular to a luminous flux detection device of a lamp and a stage lamp. Background Art

[0002] After prolonged operation, a lamp's luminous flux will gradually exhibit subtle changes that are difficult to detect with the naked eye. While these changes may be minor, they are significant, impacting the lamp's overall lighting quality and visual performance. Over time, the lamp's light source may also lose luminous flux due to factors such as heat, aging, and contamination. This degradation process is typically gradual, and initial changes may not be noticeable. However, over time, these subtle differences accumulate, eventually leading to significant visual changes. Furthermore, many lamps lack specialized lighting tools or instruments capable of accurately and in real time measuring luminous flux. Testing requires disassembling the lamp while it is idle and then reinstalling it, which is extremely time-consuming. Consequently, the lamp's internal system cannot automatically monitor its luminous flux status, making it difficult for the system to immediately detect changes in luminous flux. At this point, the projected light spot may have begun to deviate from the design's intended location. In these situations, lamp maintenance personnel are unable to perform timely maintenance and adjustments. This not only affects the lighting effect of the lamp, but may also damage the artistic effect of the entire display or performance. The projection effect will be significantly affected, and the change in light spot may cause the projected scene to deviate to a certain extent from the original design effect.

[0003] Therefore, there is an urgent need for a technical solution that can facilitate the internal system of the lamp to detect the luminous flux. Utility Model Content

[0004] In order to solve the technical problems existing in the prior art to a certain extent as much as possible, the utility model provides a luminous flux detection device for a lamp and a stage light, which can facilitate the control system inside the lamp to perform luminous flux detection, helping maintenance personnel to promptly discover changes in the luminous flux of the lamp.

[0005] The utility model provides a luminous flux detection device for a lamp, comprising:

[0006] a heat absorber, for being arranged in a lamp of the lamp;

[0007] a driving mechanism, which is transmission-connected to the heat absorber and is used to drive the heat absorber to enter / withdraw from the irradiation range of the light beam of the light source, and the heat absorber absorbs heat from the light source when entering the irradiation range of the light beam of the light source;

[0008] A plurality of temperature probes are arranged and distributed on the heat absorbing body;

[0009] Wherein, each of the temperature probes detects the temperature of each area of ​​the heat absorber, and the control system calculates the luminous flux of the light source based on the temperature data fed back by each of the temperature probes.

[0010] According to the luminous flux detection device of a lamp of the present invention, each of the temperature probes is at least one of a thermal resistance sensor, a thermocouple sensor, a thermistor sensor, and an infrared sensor.

[0011] According to the luminous flux detection device of a lamp of the present invention, each temperature probe is arranged on a side of the heat absorber away from the light source.

[0012] According to the luminous flux detection device of a lamp of the present invention, the temperature probes are distributed in a "cross" shape / in an "L" shape / surround the periphery of the heat absorber / arranged and spread on the same plane of the heat absorber.

[0013] According to the luminous flux detection device of a lamp of the present invention, the heat absorber is made of metal.

[0014] According to the luminous flux detection device of a lamp of the present invention, the heat absorber is in sheet shape, and the size range of thickness t is: 0.2mm≥t≥1.5mm.

[0015] According to the luminous flux detection device of a lamp of the present invention, the area of ​​the side of the heat absorber that contacts the light beam of the light source is larger than the spot area of ​​the light beam of the light source.

[0016] According to the luminous flux detection device of a lamp of the present invention, the side of the heat absorber that contacts the light beam of the light source is coated with a black coating. The reflectivity and absorptivity of the coating in the visible light band are consistent and stable, and the absorptivity should be no less than 85%.

[0017] According to the luminous flux detection device of a lamp of the present invention, the driving mechanism includes a motor and a connecting plate;

[0018] One end of the connecting plate is transmission-connected to the power output shaft of the motor, and the other end is connected to the heat absorber;

[0019] The motor drives the connecting plate to rotate, causing the heat absorber to rotate into or out of the irradiation range of the light beam of the light source.

[0020] The structure of a luminous flux detection device for a stage lamp of the present invention includes a heat absorbing body arranged inside the lamp and a driving mechanism that is transmission-connected to the heat absorbing body. When it is necessary to detect the luminous flux of the light source of the lamp, the driving mechanism is used to drive the heat absorbing body into the irradiation range of the light source beam, so that the light spot projected by the light source beam can fall on the heat absorbing body. At this time, the heat absorbing body is used to absorb the heat of the light source inside the lamp. On the other hand, a plurality of temperature probes are arranged and distributed on the heat absorbing body, and each of the temperature probes contacts the heat absorbing body from a different position, so that each of the temperature probes can detect the heat absorbing body from a different position. The temperature of the heat absorber is measured by these temperature probes, and the temperature data used to feedback the luminous flux of the light source are output to the control system. These temperature data reflect the temperature status of different positions on the heat absorber, so that the control system can generate a temperature map based on these temperature data. The generated temperature map feeds back the temperature field status formed on the heat absorber. According to Stefan Boltzmann's law, the temperature field status formed on the heat absorber can be used to reflect the luminous flux of the light source. Therefore, the control system inside the lamp can detect the luminous flux of the light source according to the temperature data of each temperature probe, which also helps maintenance personnel to promptly discover changes in the luminous flux of the lamp.

[0021] Based on the above, the present invention further provides a stage light, comprising a base chassis, a support arm pivotally connected to the base chassis, a lamp head pivotally connected to the support arm, a light source and a support frame disposed within the lamp head, and a luminous flux detection device for the lamp as described above disposed on the support frame. The luminous flux detection device of the present invention is disposed within the stage light, thereby facilitating luminous flux detection by a control system within the stage light, thereby assisting maintenance personnel in promptly detecting changes in the luminous flux of the stage light. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is the internal structure diagram of the stage light of this utility model

[0024] Figure 2 This is an exploded view of the interior of the stage light of the present invention;

[0025] Figure 3 This is a structural diagram of the lamp holder of the utility model;

[0026] Figure 4This is a front view of the interior of the stage light of the present invention;

[0027] Figure 5 This is a diagram showing the arrangement of the temperature probes on the heat absorber in the present invention;

[0028] Figure 6 This is a diagram showing the arrangement of the temperature probes on the heat absorber in the present invention;

[0029] Figure 7 This is a diagram showing the arrangement of the temperature probes on the heat absorber in the present invention;

[0030] Figure 8 This is a diagram showing the arrangement of the temperature probes on the heat absorber in the present invention.

[0031] Reference numerals:

[0032] 1. Heat absorber, 2. Temperature probe, 3. Driving mechanism, 31. Motor, 32. Connecting plate;

[0033] 100. Support arm, 101. Lamp holder, 102. Light source, 103. Support frame. DETAILED DESCRIPTION

[0034] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention. In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like, indicating positions or positional relationships, are based on the positions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and are therefore not to be construed as limiting the present invention.

[0035] like Figures 1 to 4As shown, a luminous flux detection device for a lamp of this embodiment is installed in a stage lamp. The structure of the stage lamp includes a bottom chassis (not shown in the figure), a support arm 100 and a lamp head 101. The support arm 100 is pivotally connected to the bottom chassis. The left and right sides of the lamp head 101 are respectively pivotally connected to the support arm 100. A light source 102 and a support frame 103 are installed in the lamp head 101. The luminous flux detection device is installed on the support frame 103. The structure of the luminous flux detection device includes a heat absorber 1, a driving mechanism 3 and multiple The heat absorber 1 is configured to absorb heat from the light source 102. The drive mechanism 3 is connected to the heat absorber 1. Optionally, the drive mechanism 3 includes a motor 31 and a connecting plate 32. One end of the connecting plate 32 is connected to the power output shaft of the motor 31, and the other end of the connecting plate 32 is connected to the heat absorber 1. The motor 31 drives the connecting plate 32 to rotate, thereby rotating the heat absorber 1 to enter or exit the illumination range of the light source beam. When the heat absorber 1 enters the illumination range of the light source beam, it absorbs the heat of the light source. When it is necessary to detect the luminous flux of the light source 102, the drive mechanism 3 drives the heat absorber 1 into the illumination range of the light source beam. The temperature probes 2 are arranged and distributed on the heat absorber 1. Each temperature probe 2 detects the temperature of each area of ​​the heat absorber 1 from a different position. The control system calculates the luminous flux of the light source based on the temperature data fed back by each temperature probe 2.

[0036] It can be understood that when the luminous flux of the lamp light source needs to be measured, the drive mechanism 3 is used to drive the heat absorber 1 into the illumination range of the light source beam, allowing the light spot projected by the light source beam to fall on the heat absorber 1. At this time, the heat absorber 1 absorbs the heat of the light source inside the lamp. On the other hand, a number of temperature probes 2 are also arranged and distributed on the heat absorber 1. Each temperature probe 2 detects the heat absorber 1 from a different position, so that each temperature probe 2 can detect the temperature of each area of ​​the heat absorber 1 from a different position. These temperature probes 2 are used to output temperature data used to feedback the luminous flux of the light source to the control system. This temperature data reflects the temperature state of each different position on the heat absorber 1, allowing the control system to generate a temperature map based on this temperature data. The generated temperature map reflects the temperature field state formed on the heat absorber 1. According to Stefan-Boltzmann's law, the temperature field state formed on the heat absorber 1 can be used to reflect the luminous flux of the light source. Therefore, the control system inside the lamp can infer the luminous flux of the light source based on the temperature data of each temperature probe 2, which also helps maintenance personnel to promptly detect changes in the luminous flux of the lamp. In practical applications, the temperature field can also form a two-dimensional image related to the illumination or luminous flux of the light source after data processing and analysis, which can more intuitively reflect the light parameter distribution and thermal distribution of the lamp itself. During the use of the lamp, it can solve the changes in luminous flux that are indistinguishable to the human eye, thereby facilitating engineers to adjust the light source parameters of the lamp. At the same time, the installation position of components around the light source can also be designed and adjusted based on the temperature field distribution to avoid components being too close to the light source and causing damage, or too far away and causing waste of space.

[0037] In this embodiment, each temperature probe 2 can be configured as one or more of a thermal resistance sensor, a thermocouple sensor, a thermistor sensor, and an infrared sensor.

[0038] In this embodiment, each temperature probe 2 is mounted on the upper side of the heat absorber 1 (equivalent to the side away from the light source), while the lower side of the heat absorber 1 is used to absorb the light beam from the light source. This prevents the temperature probe 2 from directly absorbing the light beam from the light source, resulting in an incomplete light spot received by the heat absorber 1. This prevents heat loss, affects the temperature rise rate, and further affects the detection accuracy of the detection device for the light flux.

[0039] In this embodiment, the distribution and arrangement of the temperature probes 2 on the heat absorber 1 can be selected in a variety of ways. Figure 5 As shown, each temperature probe 2 is distributed in a "cross" shape on the heat absorber 1. Figure 6 As shown, each temperature probe 2 is distributed in an "L" shape on the heat absorber 1. Figure 7As shown, each temperature probe 2 surrounds the periphery of the heat absorber 1. The above three arrangements can reduce the number of temperature probes 2 and also make the temperature probes 2 evenly distributed on the heat absorber 1, thereby ensuring the accuracy of light flux detection and saving manufacturing costs. Figure 8 As shown, the temperature probes 2 are arranged on the same plane as the heat absorber 1. This arrangement requires a larger number of temperature probes 2, which is more expensive, but ensures optimal light flux detection accuracy. Furthermore, the temperature probes 2 are located at different positions relative to the center of the heat absorber 1.

[0040] In this embodiment, the heat absorber 1 is made of aluminum, a material characterized by high heat absorption, rapid temperature rise, and opacity. Furthermore, the heat absorber 1 is in sheet form, with a thickness t ranging from 0.2 mm to 1.5 mm. Preferably, the thickness t is set to 0.5 mm, thereby reducing the thickness of the heat absorber 1. A smaller thickness results in a more significant temperature rise, and a thin sheet also saves space within the lamp. Furthermore, the underside of the heat absorber 1 (i.e., the side in contact with the light source beam) is coated with a black opaque coating with consistent and stable reflectivity and absorptivity in the visible light band. The absorptivity should be greater than 85% to prevent light loss. The entire light source beam should enter the heat absorber 1 as fully as possible to prevent light reflection or leakage that could affect the detection accuracy of the detection device. Furthermore, the area of ​​the lower side of the heat absorber 1 (i.e., the side in contact with the light beam of the light source) is larger than the spot area of ​​the light beam of the light source. This ensures that the spot of the light beam of the light source falls completely into the heat absorber 1, thereby ensuring that the heat absorber 1 receives all the light radiation emitted by the light source, avoiding light loss, and is conducive to improving the accuracy of detecting the luminous flux of the light source.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A luminous flux detection device for a lamp, characterized in that: include: A heat absorber (1) is arranged in the lamp; A driving mechanism (3) is connected to the heat absorbing body (1) and is used to drive the heat absorbing body (1) to enter / withdraw from the irradiation range of the light beam of the light source, and the heat absorbing body (1) absorbs heat from the light source when entering the irradiation range of the light beam of the light source; A plurality of temperature probes (2) are arranged and distributed on the heat absorbing body (1); Each of the temperature probes (2) detects the temperature of each area of ​​the heat absorber (1), and the control system calculates the luminous flux of the light source based on the temperature data fed back by each of the temperature probes (2).

2. The luminous flux detection device of a lamp according to claim 1, characterized in that: Each of the temperature probes (2) is at least one of a thermal resistance sensor, a thermocouple sensor, a thermal sensor, and an infrared sensor.

3. The luminous flux detection device of a lamp according to claim 1, characterized in that: Each temperature probe (2) is arranged on a side of the heat absorber (1) away from the light source.

4. The luminous flux detection device of a lamp according to claim 1, characterized in that: The temperature probes (2) are distributed on the heat absorbing body (1) in a "cross" shape, in an "L" shape, around the periphery of the heat absorbing body (1), or arranged and spread on the same plane of the heat absorbing body (1).

5. The luminous flux detection device of a lamp according to claim 1, characterized in that: The heat absorber (1) is made of metal.

6. The luminous flux detection device of a lamp according to claim 1, characterized in that: The heat absorber (1) is in sheet form, and the thickness t has a size range of: 0.2 mm ≥ t ≥ 1.5 mm.

7. The luminous flux detection device of a lamp according to claim 1, characterized in that: The area of ​​the heat absorber (1) on the side close to the light source is larger than the cross-sectional area of ​​the light beam from the light source in the plane where the heat absorber (1) is located.

8. The luminous flux detection device of a lamp according to claim 1, characterized in that: The side of the heat absorber (1) close to the light source is coated with a black coating.

9. The luminous flux detection device of a lamp according to claim 1, characterized in that: The driving mechanism (3) includes a motor (31) and a connecting plate (32); One end of the connecting plate (32) is connected to the power output shaft of the motor (31), and the other end is connected to the heat absorber (1); The motor (31) drives the connecting plate (32) to rotate, thereby causing the heat absorber (1) to rotate into or out of the irradiation range of the light beam of the light source.

10. A stage light, characterized in that: The invention comprises a bottom chassis, a support arm (100) is pivotally connected to the bottom chassis, a lamp head (101) is pivotally connected to the support arm (100), a light source (102) and a support frame (103) are arranged in the lamp head (101), and a luminous flux detection device of the lamp according to any one of claims 1 to 9 is arranged on the support frame (103).

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