TW202314202A - System and method for detecting luminance of lamp - Google Patents

Abstract

A system and a method for detecting luminance of a lamp are provided. The system includes a luminaire and an external server. The luminaire includes a light source module and a light detector. The light source module includes a light-emitting unit and a first optical lens covering the light-emitting unit. The light emitted by the light-emitting unit penetrates through the first optical lens to form an exiting light beam. The light detector is disposed on an optical path of the exiting light beam and configured for detecting an ambient light intensity and obtaining a lamp light intensity according to a partial light of the exiting light beam. The external server is connected to the light detector and is configured for obtaining luminance degradation information of the luminaire according to a change of the ambient light intensity and the lamp light intensity.

Description

Brightness detection system and method for lamps

The invention relates to a brightness detection system, and in particular to a brightness detection system of a lamp.

Some lamps installed outdoors are often affected by ambient light sources, making it difficult for human eyes to recognize the light emitting conditions of the lamps. In addition, the light source of the lamp is also prone to the problem of brightness attenuation under long-term use; if it cannot be found and replaced in time, it is easy to cause accidents. In order to solve this problem, the light source of the lamp is generally removed at a fixed time for brightness measurement, or replaced after a certain period of use is estimated; however, this requires a lot of labor costs or unnecessary replacement waste.

The invention relates to a brightness detection system of a lamp, which can obtain the light intensity of the lamp by sensing the local light of the light-emitting unit, and can monitor whether the light-emitting unit has light attenuation without affecting the luminous efficiency of the lamp device. The situation arises, thereby adjusting the luminous intensity and light pattern of the lamp.

According to one aspect of the present invention, a brightness detection system of a lamp is provided. The brightness detection system of the lamp includes a lamp device and an external server. The lighting device includes a light source module and a light detector. The light source module includes a light-emitting unit and a first optical lens. The first optical lens covers the light-emitting unit correspondingly. The light emitted by the light-emitting unit passes through the first optical lens to form light rays. The light detector is located on the optical path of the outgoing light, and is used to detect the intensity of ambient light, and obtain the light intensity of the lamp according to the partial light of the outgoing light. The external server is connected with the light detector to obtain the brightness attenuation information of the lamp device according to the change of the ambient light intensity and the light intensity of the lamp.

According to another aspect of the present invention, a brightness detection method of a lamp is provided. The method for detecting brightness of a lamp includes the following steps. A light-emitting unit of a lamp device emits a light-emitting light. Detect an ambient light intensity. The light intensity of a lamp is obtained according to a part of the outgoing light. Obtain brightness attenuation information of the lighting device according to changes in the ambient light intensity and the light intensity of the lamp.

In order to have a better understanding of the above-mentioned and other aspects of the present invention, the following specific examples are given in detail with the accompanying drawings as follows:

Various embodiments of the present invention will be described in detail below and illustrated with accompanying drawings. In addition to these detailed descriptions, the present invention can also be widely implemented in other embodiments, and any easy replacement, modification, and equivalent changes of any of the described embodiments are included in the scope of the present invention, and are defined in the following patent scope prevail. In the description of the specification, many specific details and implementation examples are provided in order to enable readers to have a more complete understanding of the present invention; however, these specific details and implementation examples should not be regarded as limitations of the present invention. Also, well-known steps or elements have not been described in detail in order to avoid unnecessarily limiting the invention. And, unless otherwise stated, the same reference numerals in different drawings can be regarded as corresponding components. The illustrations in these drawings are for clearly expressing the connection relationship between the various elements in these embodiments, and do not depict the actual size or proportional relationship of the various elements.

FIG. 1 is an exploded view illustrating a lighting device 100 according to an embodiment of the present invention. In the embodiment, the lighting device 100 is a lighting device applied to traffic lights, but the present invention is not limited thereto. For example, in other or unillustrated embodiments, it can also be any lighting device applied outdoors, such as street lights, warning lights, parking lot or stadium lighting, and so on.

The lighting device 100 may include a housing 110 , a light source module 120 , a circuit module 130 , a light detector 140 , an optical element 150 , a light-shape shield 160 , a gasket 170 , a front cover 180 and a fixing piece 190 . The casing 110 has an accommodating space S, and the light source module 120 , the circuit module 130 and the light detector 140 are disposed in the accommodating space S. The light source module 120 and the circuit module 130 can optionally be fixed on the housing 110 by a joint component JC. The optical element 150 is disposed on the casing 110 and covers the accommodating space S; the optical shield 160 , the gasket 170 , the front cover 180 and the fixing member 190 can be arranged according to requirements. The optical element 150 can be a lens, preferably a Fresnel lens, to condense light and emit light in a manner similar to or equivalent to parallel light. The light-shape shield 160 has a light-transmitting area to provide various types of light-emitting patterns; if the lighting device 100 is a direction indicator light, the light-shape shield 160 may have an arrow-shaped light-transmitting opening or a light-transmitting layer. The gasket 170 can be a waterproof rubber ring, and is disposed between the front cover 180 and the casing 110 . The front cover 180 can be light-transmitting sheets of different colors (eg, red, yellow, green) for allowing light to pass through, so that the light has a specific color. The fixing part 190 can be a fixing rubber ring, which fixes the optical element 150 , the light-shape cover 160 , the washer 170 and the front cover 180 to the casing 110 .

The light source module 120 may include a circuit board 120C1 and a plurality of light emitting units 121 . The light emitting unit 121 is, for example, a light emitting diode (Light Emitting Diode, LED), but the present invention is not limited thereto. The light emitting unit 121 and the light detector 140 are disposed on the circuit board 120C1. The circuit module 130 is electrically connected to the light source module 120, which may include a power converter 132, a controller 133, a voltage/current detector 134, an analog/digital converter 135 (Analog to Digital Converter, ADC) and wireless communication Module 136.

Please refer to FIG. 2 , which is a block diagram illustrating a brightness detection system 1 for lamps according to an embodiment of the present invention. The brightness detection system 1 of a lamp may include a lamp device 100 , a power supply device 30 and an external server 20 . The power supply device 30 can be, for example, a commercial power supply, and the lighting device 100 can be coupled to the external power supply device 30 . The AC power provided by the power supply device 30 can be converted into DC power by the power converter 132 of the lighting device 100 , and the DC power is provided to the controller 133 through the power converter 132 . The controller 133 can control the light-emitting unit 121 on and off, light-emitting degree, color temperature, etc. according to set parameters. The light detector 140 can be used to detect the ambient light intensity AL; in addition, as shown in FIG. The ambient light intensity AL can be measured, and the local light L2 emitted by the light emitting unit 121 can also be sensed, and the light intensity LL of the lamp can be obtained according to the local light L2.

Here, please further refer to FIG. 1 and FIG. 3 , and FIG. 3 is a schematic diagram illustrating a light source module 120 according to an embodiment of the present invention. As shown in FIG. 1 and FIG. 3 , the light source module 120 may further include more than one first optical lens 122a, and these first optical lenses 122a cover each light emitting unit 121 correspondingly. The first optical lens 122a may be a secondary lens, such as a convex lens, a concave lens or a combination thereof, wherein the convex lens and the concave lens may be a spherical lens, an aspheric lens or a free-form surface lens. The light emitted by each light emitting unit 121 passes through the first optical lens 122a to form a light L. The outgoing light L includes a main light L1 and a partial light L2. The main light L1 is most of the light from the light emitting unit 121 , which can emit light in the forward direction (towards the front cover 180 ), and serves as the main light source of the lighting device 100 . The first optical lens 122a can effectively change the direction of the light L1, such as diffusing the light, concentrating the light in a certain direction to improve the directivity of the light, or increasing the divergence angle of the light to meet the application requirements of the product. In addition, the light source module 120 may further include a second optical lens 122 b covering the light detector 140 . The second optical lens 122b may also be a secondary lens.

In an embodiment, the light detector 140 is located on the optical path of the outgoing light L. Referring to FIG. Preferably, the light detector 140 can be located on the path of the partial light L2 of the outgoing light L to sense the partial light L2. The local light L2 is, for example, the side light of the light emitting unit 121 . For example, in the embodiment shown in FIG. 3 , the light source module 120 may further include more than one light guide channel 123 . The first optical lens 122a, the second optical lens 122b and the light guide channel 123 can be formed together with a carrier board 120C2, or can be separate components respectively disposed on the carrier board 120C2. Each first optical lens 122a can be connected to the second optical lens 122b through one of the light guide channels 123 , and the first optical lens 122a can communicate with the second optical lens 122b through the light guide channel 123 . The light guide channel 123 is preferably disposed on the side of the first optical lens 122a and the second optical lens 122b. Therefore, among the light rays L emitted by the light emitting unit 121, a small part of the partial light L2, especially the light emitted from the side of the first optical lens 122a, can pass through the light guide channel 123 and be guided to the second optical lens 122b. and is sensed by the light detector 140 . Since the proportion of the local light L2 to the total output light L is fixed, the light detector 140 can detect the change of the light intensity LL of the lamp by sensing the change of the local light L2. Preferably, the width of the light guide channel 123 is smaller than the width of the first optical lens 122a and the second optical lens 122b, which can reduce light loss during transmission; the inside of the light guide channel 123 can also be coated with reflective paint to enhance light transmission efficiency.

Please refer to FIG. 2, after the light detector 140 detects the intensity of ambient light AL and the intensity of the local light L2 as the light intensity LL of the lamp, the analog/digital converter 135 can convert the detected ambient light intensity AL and the intensity of the lamp The result of the light intensity LL is output as a digital signal. Then, the signals of the ambient light intensity AL and the lamp light intensity LL can be transmitted to the external server 20 through the wireless communication module 136 . The external server 20 can record the historical information of the ambient light intensity AL and the lamp light intensity LL, and obtain the brightness attenuation information of the lamp device 100 according to the changes of the ambient light intensity AL and the lamp light intensity LL, and perform data analysis to monitor the lamps in real time If the brightness of the device 100 changes, it is judged whether the brightness is attenuated and the maintenance personnel need to be reminded to replace the lamp. In this embodiment, the light intensity LL of the lamp is the intensity of the local light L2, but the present invention is not limited thereto. In other embodiments, the light detector 140 can calculate the overall light intensity of the lamp (that is, the intensity of the light L1 + the intensity of the local light L2) according to the detected intensity of the local light L2, and then transmit the overall light intensity of the lamp. to the analog/digital converter 135; or, the light detector 140 outputs the detected intensity of the local light L2 to the external server 20, and the external server 20 calculates the overall light intensity of the lamp according to the intensity of the local light L2 (that is, the intensity of light L1+the intensity of local light L2), and then transmit the overall light intensity of the lamp to the light detector 140 or the analog/digital converter 135, and the subsequent steps are the same as the above-mentioned embodiment. The light intensity LL is the overall light intensity of the lamp, that is, the brightness information of the lamp device 100 is obtained according to the change of the ambient light intensity AL and the light intensity LL of the lamp (or the overall light intensity of the lamp).

For example, the lighting device 100 controls the light emitting unit 121 to emit light or not to emit light in response to the conversion of the sign. During the daytime, when the light emitting unit 121 is not emitting light, the light detector 140 can detect the pure ambient light intensity AL; when the light emitting unit 121 switches to the light emitting state, the light detector 140 can simultaneously detect the ambient light Intensity AL and lamp light intensity LL; and these data will be sent to the external server 20 together. The external server 20 can obtain the brightness information of the lamp device 100 according to these data, for example, calculate the proportional relationship between the lamp light intensity LL and the ambient light intensity AL, and obtain the phantom ratio of the sun phantom. The external server 20 can also obtain the brightness attenuation information of the lighting device 100 through long-term monitoring of the brightness ratio, and detect whether there is light attenuation in the light-emitting unit 121. Once the brightness ratio is found to be inconsistent with the legal requirements, a warning can be issued to remind the maintenance personnel to repair the lighting. replacement. In one embodiment, the external server 20 can also monitor the change of brightness ratio in real time. When it is found that the brightness ratio is too small or too large in a certain period of time, it can send an adjustment signal AS, and send the adjustment signal AS through the wireless communication module 136 to The controller 133, so that the controller 133 can adjust the luminous intensity of the light emitting unit 121 in a timely and appropriate manner according to the adjustment signal; once it is found that the luminous intensity of the light emitting unit 121 cannot be adjusted upwards, it can be judged that the light emitting unit 121 has declined to a certain extent, and the external The server 20 then sends out a warning to remind the maintenance personnel to replace the lamp.

At night, when the light emitting unit 121 is not emitting light, the light detector 140 can detect the weak ambient light intensity AL; The ambient light intensity AL and the lamp light intensity LL; and these data will be sent to the external server 20 together. The external server 20 can obtain the brightness information of the lamp device 100 according to these data, such as the on-off brightness ratio of the lamp. Here, since the ambient light intensity AL is very weak compared with the light intensity LL of the lamp, at night, the external server 20 mainly obtains the brightness attenuation information of the lamp device 100 according to the long-term change of the light intensity LL of the lamp. If it is found that the light intensity LL of the lamp has attenuated by a certain ratio compared with the initial value or the average value in the past, the external server 20 may issue a warning to remind maintenance personnel to replace the lamp.

On the other hand, as shown in FIG. 2 , the voltage/current detector 134 can also obtain the voltage/current value output from the controller 133 to each light emitting unit 121 . The voltage/current value can be converted into a digital signal by the analog/digital converter 135 , and then sent to the external server 20 via the wireless communication module 136 , so as to determine whether each light-emitting unit 121 is currently operating normally through the calculation of the external server 20 .

As described above, the present invention acquires the light intensity LL of the lamp by sensing the local light L2 of the light emitting unit 121 instead of sensing the forward light L1 which is the main light source. Therefore, the light detector 140 does not need to be installed in the forward direction of the light emitting unit 121, which can prevent the installation of the light detector 140 from blocking or intercepting the main light L1, so that the luminous efficiency of the lighting device 100 can not be affected. , to monitor whether there is light attenuation in the light emitting unit 121 . In addition to the foregoing embodiments, the present invention may also have the following configurations, but these are not intended to limit the present invention.

Fig. 4A is a schematic diagram illustrating a light source module 220 according to another embodiment of the present invention, and Fig. 4B is a cross-sectional view along the section line 4B-4B' of Fig. 4A. Please refer to FIG. 4A and FIG. 4B , in this embodiment, the light source module 220 does not include the second optical lens 122 b and the light guiding channel 123 of the previous embodiment, but includes a reflector 224 . In this embodiment, the reflector 224 and the carrier 120C2 are formed together, but the invention is not limited thereto, and the reflector 224 and the carrier 120C2 may be separate components. The reflector 224 is disposed on the optical path of part of the light (such as the partial light L2 ) of the light emitting unit 121 , and the part of the light can be guided to the photodetector 140 through the reflector 224 and sensed by the photodetector 140 . Since the light that can be sensed by the light detector 140 accounts for a fixed proportion of the total emitted light, it can be used to detect changes in the light intensity of the lamp. In this embodiment, the reflection cover 224 has an opening facing the light emitting unit, so that the partial light L2 enters the reflection cover 224 through the opening, and is guided to the light detector by the reflection cover. Preferably, the height of the reflector 224 is greater than that of the first optical lens 122a, so that the partial light L2 can be collected more efficiently.

FIG. 5 is a schematic diagram illustrating a light source module 320 according to yet another embodiment of the present invention. Please refer to FIG. 5 , in this embodiment, the first optical lens 322 a is disposed around the second optical lens 322 b so that the light detector 140 is located in the middle of the light emitting unit 121 . The partial light emitted from the side of each first optical lens 322a can pass through the light guiding channel 323 and guide into the second optical lens 322b, and be sensed by the light detector 140 . In addition, the light detector 140 and the second optical lens 322b maintain a consistent distance from each light emitting unit 121 (that is, the distances between the first optical lens 322a and the second optical lens 322b are the same), so as to accurately analyze Whether each light-emitting unit 121 has light attenuation.

FIG. 6 is a schematic diagram illustrating a light source module 420 according to another embodiment of the present invention, and FIG. 7 is a cross-sectional view illustrating a lighting device 400 according to another embodiment of the present invention. In order to clearly show the details of the present invention, drawing of some elements is omitted in Fig. 7 . Please refer to FIG. 6 , in this embodiment, the light source module 420 does not include the light guide channel 123 , and the first optical lenses 422 a and the second optical lenses 422 b are spaced apart from each other. This embodiment can be arranged with the optical element 150 as shown in FIG. can be guided into the second optical lens 422 b and sensed by the light detector 140 . Since the light that can be sensed by the light detector 140 accounts for a fixed proportion of the total emitted light light L, it can be used to detect the change of the light intensity of the lamp.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Those skilled in the art of the present invention can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of the appended patent application.

1: Brightness detection system of lamps 20: External server 30: Power supply equipment 100,400: Lighting fixtures 110: shell 120,220,320,420: light source module 120C1: circuit board 120C2: carrier board 121: Lighting unit 122a, 322a, 422a: first optical lens 122b, 322b, 422b: the second optical lens 123,323: light guide channel 130: circuit module 132: Power converter 133: Controller 134: Voltage/current detector 135:Analog/digital converter 136: Wireless communication module 140: Light detector 150: Optical components 160: Light shape mask 170: Gasket 180: Front cover 190:Fixer 224: reflector AL: ambient light intensity AS: adjust signal L: Outgoing light L1: light L2: local light LF: reflected light LL: light intensity of lamp JC:Joint Components S: storage space

Figure 1 is an exploded view of a lighting device according to an embodiment of the present invention; Fig. 2 is a block diagram illustrating a brightness detection system of a lamp according to an embodiment of the present invention; FIG. 3 is a schematic diagram illustrating a light source module according to an embodiment of the present invention; FIG. 4A is a schematic diagram illustrating a light source module according to another embodiment of the present invention; Figure 4B shows a cross-sectional view of Figure 4A along the section line 4B-4B'; FIG. 5 is a schematic diagram illustrating a light source module according to yet another embodiment of the present invention; FIG. 6 is a schematic diagram illustrating a light source module according to yet another embodiment of the present invention; and FIG. 7 is a cross-sectional view illustrating a lighting device according to yet another embodiment of the present invention.

1: Brightness detection system of lamps

20: External server

30: Power supply equipment

100: Lighting device

121: Lighting unit

132: Power converter

133: Controller

134: Voltage/current detector

135:Analog/digital converter

136: Wireless communication module

140: Light detector

AL: ambient light intensity

AS: adjust signal

L2: local light

LL: light intensity of lamp

Claims (10)

A brightness detection system for lamps, comprising: A lighting installation, comprising: A light source module, including a light emitting unit and a first optical lens, the first optical lens is correspondingly covered on the light emitting unit, the light emitted by the light emitting unit passes through the first optical lens to form a light emitting light; A light detector, located on the light path of the light emitting light, is used to detect an ambient light intensity, and obtain a light intensity of a lamp according to a partial light of the light emitting light; and An external server, connected with the light detector, is used to obtain a brightness attenuation information of the lighting device according to the change of the ambient light intensity and the light intensity of the lamp. The brightness detection system of lamps and lanterns according to claim 1, wherein the light source module further includes a second optical lens covering the light detector. The brightness detection system of a lamp according to claim 2, wherein the light source module further includes a light guide channel, and the first optical lens is connected to the second optical lens through the light guide channel. The brightness detection system for lamps as claimed in claim 3, wherein the light guide channel is disposed on the side of the first optical lens and the second optical lens. The brightness detection system of lamps and lanterns according to claim 3, wherein the width of the light guiding channel is smaller than that of the first optical lens. The brightness detection system of lamps and lanterns as described in claim 2 or 3, wherein the first optical lens is plural, the first optical lenses are arranged around the second optical lens, and the first optical lenses and the second optical lens Optical lenses are at the same distance. The brightness detection system of a lamp according to claim 1, wherein the light source module further includes a reflector, the reflector has an opening facing the light-emitting unit, the partial light enters the reflector through the opening, and is emitted from the reflector A reflector guides to the light detector. The brightness detection system for lamps as claimed in Claim 7, wherein the height of the reflector is greater than that of the first optical lens. The brightness detection system for lamps as described in claim 2, wherein the lamp device further includes a casing and an optical element, the casing has an accommodating space, the light source module and the light detector are arranged in the accommodating The optical element is disposed in the casing and covers the accommodating space, wherein the partial light is reflected to the second optical lens through the optical element. A method for detecting brightness of a lamp, comprising: A light-emitting unit of a lighting device emits a light; detecting an ambient light intensity; Acquiring the light intensity of a lamp according to a part of the outgoing light; Obtain brightness attenuation information of the lighting device according to the ambient light intensity and the change of the light intensity of the lighting device.

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