CN109996383B - Illumination control method based on human body induction and illumination lamp - Google Patents
Illumination control method based on human body induction and illumination lamp Download PDFInfo
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- CN109996383B CN109996383B CN201910340808.7A CN201910340808A CN109996383B CN 109996383 B CN109996383 B CN 109996383B CN 201910340808 A CN201910340808 A CN 201910340808A CN 109996383 B CN109996383 B CN 109996383B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention provides a lighting control method based on human body induction and a lighting lamp, wherein the lighting lamp comprises the following components: the device comprises a shell, a power supply module, a microcontroller, a light source module, a driving module and at least one first sensor, wherein the power supply module and the microcontroller are packaged in the shell; the driving module is used for generating a driving signal under the control of the microcontroller and transmitting the driving signal to the light source module; the light source module is used for periodically generating first emergent light rays with a first preset frequency based on a driving signal transmitted by the driving module; the first sensor is used for receiving first reflected light of the first emergent light after the first emergent light is reflected under the current environment, generating a first electric signal based on the first reflected light and transmitting the first electric signal to the microcontroller; and the microcontroller is also used for controlling the illumination state of the light source module according to the first electric signal. The lighting lamp provided by the invention is simple in integral structure, and can intelligently provide lighting and reduce the cost.
Description
Technical Field
The invention relates to the technical field of illumination, in particular to an illumination control method and an illumination lamp based on human body induction.
Background
With the continuous development of science and technology, the switch of a lamp is often controlled through a human body induction sensor in the field of illumination, and when a person is detected in a space, the lamp is turned on to illuminate; otherwise, the lamp is turned off. The human body induction sensor is used as a basic and universal sensor, the main function of the human body induction sensor is to detect whether personnel exist in a certain space, and the lamp can be turned off when illumination is not needed through the human body induction sensor, so that energy is saved, and electricity consumption cost is saved.
The main implementation techniques of the commonly used human body induction sensor are various: pyroelectric sensors, thermopile sensors, microwave sensors, cameras, etc. These sensors have their own advantages but also have some problems. The pyroelectric sensor and the microwave sensor can sense the movement of a human body, but cannot effectively detect stationary objects; for example, a human body induction sensor is arranged in a room and is linked with a lighting lamp in the room. After entering the room, the lamp is automatically turned on for illumination as the human body sensor detects a human body; a person sits in front of the desk to read a book, keeps still, the sensor cannot detect a human body, and after a period of time, the lamp is automatically turned off; the sensor can be re-triggered by the person taking an irregular hand swing or by making a relatively large motion. In order to avoid frequent hands waving by a person in the above applications to prevent the human body sensor from sensing the presence of the person and turning off the light, one solution is to properly extend the delay time after the human body sensor is triggered, and turn off the light after the delay time. However, this brings about another problem: if people leave the room immediately after entering the room, the human body sensor is triggered, and the light is turned off after a long time, so that energy waste is brought.
In addition, although the camera can identify the human body, there is a possibility that privacy is leaked; the thermopile can detect the existence of human body, but has higher price and is not easy to popularize.
Disclosure of Invention
The invention provides a lighting control method and a lighting fixture based on human body induction to overcome the problems or at least partially solve the problems.
According to an aspect of the present invention, there is provided a lighting fixture comprising: the device comprises a shell, a power supply module, a microcontroller, a light source module, a driving module and at least one first sensor, wherein the power supply module and the microcontroller are packaged in the shell; wherein the content of the first and second substances,
the driving module is used for generating a driving signal under the control of the microcontroller and transmitting the driving signal to the light source module;
the light source module is used for periodically generating first emergent light rays with a first preset frequency based on a driving signal transmitted by the driving module;
the first sensor is used for receiving first reflected light after the first emergent light is reflected under the current environment, generating a first electric signal based on the first reflected light and transmitting the first electric signal to the microcontroller;
the microcontroller is further configured to obtain a first reflection coefficient of the current environment according to the first electrical signal analysis, and control the illumination state of the light source module through the driving module based on the first reflection coefficient.
Optionally, the light source module includes a plurality of light emitting units; the light emitted by the light-emitting unit is visible light and/or non-visible light;
the microcontroller is further configured to: before controlling the driving module to generate a driving signal, judging whether a second reflection coefficient of the current environment in an unmanned state is stored in the microcontroller;
when a second reflection coefficient of the current environment in an unmanned state is stored, initializing the light source module, and controlling a light emitting unit in the light source module to be in a closed state;
and when the second reflection coefficient of the current environment in the unmanned state is not stored, controlling the light source module to emit second emergent light at a second preset frequency.
Optionally, the first sensor is further configured to: receiving second reflected light rays of the second emergent light rays after reflection in the current environment, and generating second electric signals based on the second reflected light rays;
the microcontroller is further used for analyzing and acquiring a second reflection coefficient of the current environment in an unmanned state based on the second electric signal.
Optionally, the microcontroller is further configured to: comparing the first and second reflection coefficients;
when the difference value between the first reflection coefficient and the second reflection coefficient is within a first preset range, controlling the driving module to stop providing driving voltage for the light source module, and enabling a light emitting unit in the light source module to be in a closed state; and when the difference value between the first reflection coefficient and the second reflection system is within a second preset range, controlling the driving module to provide driving voltage for the light source module, and enabling a light-emitting unit in the light source module to be in an illumination state.
Optionally, the first sensor comprises a light sensor and/or an illuminance sensor; the light sensor includes: visible light sensors or non-visible light sensors.
Optionally, the lighting fixture further comprises at least one second sensor, communicatively connected to the microcontroller, for detecting whether a person is present in the current environment and transmitting a detection signal to the microcontroller;
and the microcontroller is also used for controlling the light-emitting unit in the light source module to be in a lighting state when the second sensor detects that the current environment is occupied by people.
Optionally, the second sensor comprises a static sensor, a microwave sensor and/or a pyroelectric sensor.
According to another aspect of the present invention, there is also provided a lighting control method based on human body sensing, which is applied to any one of the above lighting fixtures, and the method includes:
a microcontroller in the lighting lamp controls a light source module to periodically generate first emergent light rays with a first preset frequency;
receiving a first reflected light ray of the first emergent light ray reflected under the current environment by using a first sensor in the lighting lamp, generating a first electric signal based on the first reflected light ray, and transmitting the first electric signal to the microcontroller;
and the microcontroller analyzes and acquires a first reflection coefficient of the current environment according to the first electric signal, and controls the illumination state of the light source module based on the first reflection coefficient.
Optionally, a microcontroller in the lighting fixture controls the light source module to generate a periodic current to emit a first light-emitting line with a first preset frequency, including:
the microcontroller in the lighting lamp sends a driving signal with a first preset frequency to the driving module, and the driving module drives the light source module to periodically generate current to emit first emergent light rays emitting the first preset frequency.
Optionally, the microcontroller obtains a first reflection coefficient of the current environment based on the first electrical signal analysis, including:
and the microcontroller performs digital band-pass filtering based on the first electric signal by taking the first preset frequency as a center to acquire a first reflection coefficient of the current environment.
Optionally, before the microcontroller controls the light source module to generate a periodic current through the driving module to emit a first outgoing light with a first preset frequency, the method further includes:
judging whether a second reflection coefficient of the current environment in an unmanned state is stored in the microcontroller;
if the second reflection coefficient of the current environment in the unmanned state is stored, initializing the light source module, and controlling a light-emitting unit in the light source module to be in a closed state;
if the second reflection coefficient of the current environment in the unmanned state is not stored, the microcontroller controls the light source module to emit second emergent light at a second preset frequency;
receiving, by the first sensor, second reflected light of the second outgoing light after being reflected under the current environment, and generating a second electrical signal based on the second reflected light;
and the microcontroller analyzes and acquires a second reflection coefficient of the current environment in an unmanned state based on the second electric signal.
Optionally, the controlling the illumination state of the light source module based on the first reflection coefficient includes:
comparing the first and second reflection coefficients;
if the difference value of the first reflection coefficient and the second reflection coefficient is within a first preset range, controlling a light-emitting unit in the light source module to be in a closed state;
and if the difference value of the first reflection coefficient and the second reflection system is within a second preset range, controlling a light-emitting unit in the light source module to be in an illumination state.
Optionally, if light emitted by a light emitting unit in the light source module is visible light, if the second reflection coefficient of the current environment in the unmanned state is stored, initializing the light source module, and controlling the light emitting unit in the light source module to be in the off state, the method further includes:
judging, by the microcontroller, whether a second sensor in the lighting fixture detects the presence of a person in the current environment;
and if the second sensor detects that people exist in the current environment, the microcontroller controls the light-emitting unit in the light source module to be in a lighting state.
Optionally, after the microcontroller analyzes and obtains the first reflection coefficient of the current environment based on the first electrical signal and controls the illumination state of the light source module based on the first reflection coefficient, the method further includes:
judging whether a light-emitting unit in the light source module is in an illumination state or not;
if the light-emitting unit in the light source module is in an illumination state, the microcontroller controls the light source module to generate periodic current and emit third emergent light with a third preset frequency so as to continuously monitor whether a human body exists in the current environment.
In the scheme provided by the invention, the first sensor arranged in the lighting control method is used for detecting the light reflectivity of a certain frequency in the current environment, so that whether a human body exists or not can be judged, whether the human body moves or not can be judged, and further the lighting is effectively provided. The lighting lamp provided by the invention is simple in integral structure, intelligent lighting based on human body induction can be realized by only adding two additional components, namely the microcontroller and the first sensor, compared with the traditional lighting lamp, and resources can be saved while the cost of the lamp is controlled.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic plan view of a lighting fixture according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an internal structure of a lighting fixture according to an embodiment of the invention;
FIG. 3 is a schematic view of an internal structure of a lighting fixture according to another embodiment of the invention;
FIG. 4 is a side view schematic diagram of a lighting fixture according to an embodiment of the present disclosure;
FIG. 5 is a flow chart of a lighting control method based on human body induction according to an embodiment of the invention;
FIG. 6 is a schematic diagram of an indoor environment layout according to an embodiment of the present invention;
FIG. 7 is a schematic diagram comparing a transmit signal and a receive signal of a microcontroller according to one embodiment of the invention;
FIG. 8 is a schematic diagram comparing a transmit signal and a receive signal of a microcontroller according to another embodiment of the present invention;
FIG. 9 is a flowchart illustrating a lighting control method based on human body sensing according to a preferred embodiment of the present invention;
fig. 10 is a flowchart illustrating a lighting control method based on human body sensing according to another preferred embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As can be seen from fig. 1 and 2, the lighting fixture 100 provided in the embodiment of the present invention may include: the device comprises a shell 10, a power supply module 20 and a microcontroller 30 which are packaged in the shell 10, and a light source module 40, a driving module 50 and at least one first sensor 60 which are in communication connection with the microcontroller 30; the driving module 50 is configured to generate a driving signal under the control of the microcontroller 30 and transmit the driving signal to the light source module 40; the light source module 40 is configured to periodically generate a first emergent light beam with a first preset frequency based on the driving signal transmitted by the driving module 50; the first sensor 60 is configured to receive a first reflected light beam of the first outgoing light beam reflected in the current environment, generate a first electrical signal based on the first reflected light beam, and transmit the first electrical signal to the microcontroller 30; the microcontroller 30 is further configured to obtain a first reflection coefficient of the current environment according to the first electrical signal analysis, and control the illumination state of the light source module 40 via the driving module 50 based on the first reflection coefficient.
The embodiment of the invention provides an illumination lamp 100, which can judge whether a human body exists or not and also judge whether the human body moves or not by detecting the light reflectivity of a certain frequency in the current environment based on the first sensor 60 arranged in the illumination lamp, so that illumination is effectively provided. The lighting lamp 100 provided by the embodiment of the invention has a simple overall structure, can realize intelligent lighting based on human body induction by only adding two additional components, namely the microcontroller 30 and the first sensor 60, compared with the traditional lighting lamp 100, and can save resources while controlling the cost of the lamp.
In this embodiment, the power module 20 may supply power to the driving module 50, the microcontroller 30, the first sensor 60 and the light source module 40, may receive an external power source, convert the external power source and then supply power to each module in the lighting fixture 100, may also supply power in a storage battery manner, and may be specifically configured according to different application scenarios of the lighting fixture 100, which is not limited in the present invention.
The light source module 40 can be used for providing illumination on one hand and generating light ray change with a certain frequency on the other hand; it may include a plurality of light emitting units 41, such as semiconductor light emitting units that can be LEDs, OLEDs for easy control and regulation. The light emitted from the light emitting units 41 is visible light, invisible light or a combination of both. Alternatively, the plurality of light emitting units 41 may be divided into a part of light emitting units for illumination and a part of light emitting units for emitting light with a predetermined frequency, or all light emitting units may jointly complete the operations of illumination and emitting light with a predetermined frequency, which is not limited in the present invention.
The first sensor 60 may include a light sensor and/or an illuminance sensor, wherein the light sensor may also include a visible light sensor or a non-visible light sensor. When the light emitted by the light emitting unit 41 in the light source module 40 is visible light, a visible light sensor can be correspondingly used; when the light emitted by the light emitting unit 41 is invisible light, the invisible light sensor may be used correspondingly, or both may be used simultaneously, which is not limited in the present invention.
When the light emitted from the light emitting units 41 in the light source module 40 irradiates objects such as furniture, wall surfaces, and people indoors, the light will be reflected. The reflected light may be received by the first sensor 60 (e.g., a photoelectric conversion device such as a photodiode) in the lighting fixture 100, and converted into an electrical signal based on the received light. Therefore, when the indoor configuration is different, the total first reflection coefficient is different, and assuming that the luminous flux emitted by the light emitting unit 41 in the light source module 40 is constant, the luminous flux received by the first sensor 60 is different for different environmental layouts, and thus the generated electric signals are also different.
That is, the reflection coefficients of the light of the same frequency in the presence environment of the lighting fixture 100 are different between the manned state and the unmanned state. Therefore, in the present embodiment, when the microcontroller 30 controls the illumination state of the light source module 40 according to the first reflection coefficient of the current environment, the comparison can be mainly performed with the reflection coefficient when no one is present. Optionally, the microcontroller 30 is further configured to: before controlling the driving module 50 to generate the driving signal, determining whether a second reflection coefficient of the current environment in the unmanned state is stored in the microcontroller 30; when the second reflection coefficient of the current environment in the unmanned state is stored, initializing the light source module 40, and controlling the light emitting unit 41 in the light source module 40 to be in a closed state; when the microcontroller 30 does not store the second reflection coefficient of the current environment in the unattended state, the light source module 40 is controlled to emit the second emergent light at the second preset frequency. The first sensor 60 is also used to: receiving second reflected light of the second emergent light after the second emergent light is reflected under the current environment, and generating a second electric signal based on the second reflected light; the microcontroller 30 is further configured to obtain a second reflection coefficient of the current environment in the unmanned state based on the second electrical signal analysis. The first preset frequency and the second preset frequency may be set based on different application scenarios of the lighting fixture 100, which is not limited in the present invention.
After acquiring the second reflection coefficient of the current environment when no person is present, the microcontroller 30 may control the illumination state of the light emitting unit 41 in the light source module 40 based on the first reflection coefficient and the second reflection coefficient. The microcontroller 30 is also operative to: comparing the first reflection coefficient and the second reflection coefficient; when the difference between the first reflection coefficient and the second reflection coefficient is within a first preset range, controlling the driving module 50 to stop providing the driving voltage to the light source module 40, and turning off the light emitting unit 41 in the light source module 40; when the difference between the first reflection coefficient and the second reflection system is within a second predetermined range, the driving module 50 is controlled to provide a driving voltage to the light source module 40, and the light emitting unit 41 in the light source module 40 is in an illumination state. In general, the value of the second predetermined range is larger than the value of the first predetermined range, and the specific difference range may be set according to different environment layouts.
Fig. 3 is a schematic diagram illustrating an internal structure of a lighting fixture according to another embodiment of the present invention, and as can be seen from fig. 3, the lighting fixture provided in this embodiment may further include at least one second sensor 70, which is in communication with the microcontroller 30, and is configured to detect whether a person is present in the current environment and transmit a detection signal to the microcontroller 30; and the microcontroller 30 is further configured to control the light emitting unit 41 in the light source module to be in an illumination state when the second sensor 70 detects that the current environment is occupied by a person. The second sensor 70 includes a dynamic and static sensor, a microwave sensor and/or a pyroelectric sensor, so that whether a human body exists in the current environment is more accurately judged by combining the data acquired by the second sensor 70 on the basis of the first reflection coefficient of the current environment acquired by the first sensor 60, and the accuracy of the lighting fixture for detecting the human body is further increased.
In the embodiment of the present invention, since the first sensor 60 and the second sensor 70 are required to detect the reflected light and the human body in the current environment, respectively, the first sensor 60 and the second sensor 70 may be disposed outside the housing 10, so that the detection results of the first sensor 60 and the second sensor 70 are more accurate. Fig. 4 shows a schematic side view of the lighting fixture according to the embodiment of the invention, and referring to fig. 4, it can be seen that the first sensor 60 and the second sensor 70 may be disposed on the housing 10 and located at one side of the light emitting surface of the lighting fixture 100.
Based on the same inventive concept, an embodiment of the present invention further provides a lighting control method based on human body induction, which is applied to the lighting fixture described in any of the above embodiments, and the method may include:
step S502, a microcontroller in the lighting fixture controls a light source module to periodically generate first emergent light with a first preset frequency;
step S504, a first sensor in the lighting lamp is used for receiving a first reflected light ray of the first emergent light ray reflected under the current environment, and a first electric signal is generated based on the first reflected light ray and then transmitted to the microcontroller;
step S506, the microcontroller analyzes and obtains a first reflection coefficient of the current environment according to the first electrical signal, and controls the illumination state of the light source module based on the first reflection coefficient.
The embodiment of the invention provides a lighting control method based on human body induction, a microcontroller in a lighting lamp controls a driving module to drive a light source module to generate first emergent light rays with a first preset frequency, a first sensor receives first reflected light rays reflected by the first emergent light rays in the current environment to generate a first electric signal, and finally the microcontroller determines a first reflection coefficient of the current environment according to the first electric signal to determine whether the current environment is occupied or not so as to judge whether lighting is provided or not. According to the method provided by the embodiment of the invention, intelligent illumination based on human body induction can be realized by additionally arranging the first sensor and the microcontroller in the illumination lamp, so that the human body induction efficiency is improved while the judgment process is simplified, and more intelligent illumination is provided.
In step S502, the microcontroller controls the light source module to periodically generate the first outgoing light with the first preset frequency, and further, the microcontroller in the lighting fixture may send a driving signal with the first preset frequency to the driving module, and the driving module drives the light source module to periodically generate a current to emit the first outgoing light with the first preset frequency. That is to say, the microcontroller can provide an appropriate periodic driving signal to the driving module, so as to drive the light source module to generate a periodic current. On the other hand, the microcontroller can also receive a first electric signal generated by the first sensor based on the first reflected light, and further detect the existence of the human body in the current environment based on the first electric signal.
As introduced above, the microcontroller may obtain the first reflection coefficient of the current environment based on the first electrical signal, and further, the microcontroller performs digital band-pass filtering based on the first electrical signal with the first preset frequency as a center to obtain the first reflection coefficient of the current environment. In this embodiment, the driving module drives the light source module to periodically generate an output with a certain duty ratio, and the output current may be a square wave, a sine wave, or other periodic waveforms. The transmission signal 1 shown in fig. 7 and the transmission signal 2 shown in fig. 8 are both square waves as an example, and the transmission frequency and the period of the transmission signal 1 and the transmission signal 2 are different. As can be seen from fig. 7 and 8, after the microcontroller passes through the band-pass filtered received signals 1 and 2, digital band-pass filtering may be performed with the first preset frequency as a center, and when the microcontroller performs the digital band-pass filtering, algorithms of digital band-pass filters such as chebyshev filter and butterworth filter may be used to filter out the illumination data of irrelevant frequencies, only the illumination data in a certain frequency band with the transmission frequency as a center wavelength is retained, and the environmental noise is removed to accurately obtain the first reflection coefficient of the current environment. Optionally, to further avoid interference, the microcontroller may vary the drive frequency and digitally filter the corresponding acquisition signal using a different center frequency. After the microcontroller acquires the first reflection coefficient, the driving module can be controlled to provide a driving signal for the light source module based on the first reflection coefficient, and then the lighting state of the light source module is controlled through the driving module.
Generally speaking, after light emitted from a plurality of light emitting units in a light source module irradiates objects such as indoor furniture, wall surfaces, and people, reflected light is generated. The reflected light may be received by a first sensor (e.g., a photoelectric conversion device such as a photodiode) in the lighting fixture and converted into an electrical signal based on the received light. Therefore, when the indoor structures are different, the total first reflection coefficients are different, and assuming that the luminous flux emitted by the light emitting units in the light source module is constant, the luminous flux received by the first sensor is different for different environmental layouts, so that the generated electric signals are also different. That is, the reflection coefficients of the light of the same frequency in the presence environment of the lighting fixture are different between the manned state and the unmanned state. Optionally, step S502 may further include:
judging whether a second reflection coefficient of the current environment in an unmanned state is stored in the microcontroller;
if the second reflection coefficient of the current environment in the unmanned state is stored, initializing the light source module, and controlling a light-emitting unit in the light source module to be in a closed state;
if the second reflection coefficient of the current environment in the unmanned state is not stored, the microcontroller controls the light source module to emit second emergent light at a second preset frequency; receiving second reflected light of the second emergent light reflected under the current environment through the first sensor, and generating a second electric signal based on the second reflected light; and the microcontroller analyzes and acquires a second reflection coefficient of the current environment in the unmanned state based on the second electric signal.
That is to say, before the lighting fixture realizes the human body sensing lighting control, the second reflection coefficient of the current environment of the lighting fixture when the lighting fixture is unmanned needs to be acquired first, and after the second reflection coefficient in the unmanned state of the current environment is calibrated, the microcontroller can control the lighting state of the light source module based on the first reflection coefficient, which specifically includes: comparing the first reflection coefficient and the second reflection coefficient; if the difference value of the first reflection coefficient and the second reflection coefficient is within a first preset range, controlling a light-emitting unit in the light source module to be in a closed state; and if the difference value of the first reflection coefficient and the second reflection system is within a second preset range, controlling the light-emitting unit in the light source module to be in an illumination state. Generally, the value of the second preset range is greater than the value of the first preset range, for example, the first preset range is + -3% or + -5%, the second preset range may be greater than any one of the value ranges of the second preset range, and the specific difference range may be set according to different environment layouts and adjusted according to actual situations of a site.
As described above, the light emitted by the light emitting unit in the light source module may be visible light or invisible light. If the light that the luminescence unit among the light source module sent is when the visible light, at initialization light source module, after the luminescence unit of control light source module is in the off-state, still include: judging whether a second sensor in the lighting lamp detects that a person exists in the current environment or not through the microcontroller; if the second sensor detects that the current environment is occupied by people, the microcontroller controls the light-emitting unit in the light source module to be in a lighting state. For the light source emitting visible light, the light source needs to be kept off in an unmanned state to save energy, so that whether a person exists in the current environment can be detected through the second sensor in the lighting lamp, the light emitting unit is controlled to be in a lighting state in a person-occupied state, the light emitting unit is kept off in an unmanned state, and intelligent lighting is provided while energy is saved.
If the light emitted by the light emitting unit in the light source module is invisible, since the light source module may default to the off state, the controlling the illumination state of the light source module by the microcontroller based on the first reflection coefficient may further include: judging whether a light-emitting unit in the light source module is in an illumination state or not; if the light-emitting unit in the light source module is in an illumination state, the microcontroller controls the light source module to generate periodic current and emit third emergent light with a third preset frequency so as to continuously monitor whether a human body exists in the current environment. The third preset frequency may be the same as or different from the first preset frequency and the second preset frequency, and may be specifically set according to an actual environment where the lighting fixture is located, which is not limited in the present invention.
For example, the location where the light fixture is installed may have other light sources such as daylight, incandescent light, fluorescent light, and the like. These light sources also have respective emission frequencies: the change of sunlight is below 10Hz at low frequency; the incandescent lamp is 100 Hz; fluorescent lamps are tens of KHz. The microcontroller can thus try to drive the light sources outside these several frequency bands and digitally filter the sampled signals, respectively, avoiding interference from these light sources that may be present.
The following description will be made in detail by taking visible light and invisible light as examples.
Fig. 9 is a flowchart illustrating a lighting control method based on human body sensing according to a preferred embodiment of the present invention, which is described with reference to a non-visible light source, for example, a light emitting unit in a light source module is an infrared LED, and a first sensor is an infrared sensor. As shown in fig. 9, the method provided by this embodiment may include:
s901, judging whether a reflection coefficient R1 of the current environment in an unmanned state is stored by a microcontroller; if the reflection coefficient R1 of the current environment in the unattended state is not stored, step S902 is performed, and if the reflection coefficient R1 of the current environment in the unattended state is stored, step S905 is performed;
s902, setting an unmanned state, and calibrating the unmanned state when the unmanned state is in the current environment;
s903, the microcontroller sends a periodic signal to the driving module at the frequency f1, and the driving module drives the light source module to generate emergent light X1 at the frequency f1 based on the received periodic signal; the infrared sensor receives reflected light Y1 of light X1 reflected by the current environment, generates an electric signal based on the reflected light and outputs the electric signal to the microcontroller, and the microcontroller performs filtering based on the electric signal by taking f1 as a center to obtain a reflection coefficient R1 of the current environment in an unmanned state;
s904, recording and storing a reflection coefficient R1 of the current environment in an unmanned state;
s905, initializing a light source module and controlling each light-emitting unit in the light source module to be in a closed state;
s906, the microcontroller sends a periodic signal to the driving module at the frequency f2, and the driving module drives the light source module to generate emergent light X2 at the frequency f2 based on the received periodic signal; the infrared sensor receives the reflected light Y2 of the light X2 reflected by the current environment, generates an electric signal based on the reflected light and outputs the electric signal to the microcontroller, and the microcontroller performs filtering based on the electric signal by taking f2 as a center to obtain a reflection coefficient R2 of the current environment;
s907, judging whether the current environment is in an unmanned state or not according to the difference value of the reflection coefficient R1 and the reflection R2; if the difference value between the reflection coefficient R1 and the reflection R2 is within + -5%, determining that the current environment is in an unmanned state, returning to the step S905, if the difference value between the reflection coefficient R1 and the reflection R2 exceeds + -5%, determining that the current environment is in a manned state, and executing the step S908;
s908, judging whether the light source of the light source module is turned on, if so, executing the step S906, and if not, executing the step S909;
and S909, turning on the light source and controlling the light-emitting unit in the light source module to be in an illumination state.
In practical applications, the lighting fixture may be set in a warehouse, a factory, or the like, where low-brightness illumination is required to be continued, that is, the lighting fixture needs to be in a low-brightness state in an unmanned state, and enters a high-brightness state when a person is present, even if the lighting control method based on human body sensing mentioned in the above embodiment is adopted by using the visible light source.
Fig. 10 is a schematic flow chart of a lighting control method based on human body sensing according to another preferred embodiment of the present invention, which is described in the preferred embodiment by taking a visible light source as an example, for example, a light emitting unit in a light source module is a white LED, a first sensor is a visible light sensor such as OPT101, and a lighting fixture is further provided with a second sensor such as a motion sensor. As shown in fig. 10, the method provided by this embodiment may include:
s1001, judging whether a reflection coefficient R3 of the current environment in an unmanned state is stored by a microcontroller; if the reflection coefficient R3 of the current environment in the unattended state is not stored, step S1002 is performed, and if the reflection coefficient R3 of the current environment in the unattended state is stored, step S1005 is performed;
s1002, setting an unmanned state, and calibrating the unmanned state when the unmanned state is in the current environment;
s1003, the microcontroller sends a periodic signal to the driving module at the frequency f3, and the driving module drives the light source module to generate emergent light X3 at the frequency f3 based on the received periodic signal; the visible light sensor receives reflected light Y3 of light X3 reflected by the current environment, generates an electric signal based on the reflected light and outputs the electric signal to the microcontroller, and the microcontroller performs filtering based on the electric signal by taking f3 as a center to obtain a reflection coefficient R3 of the current environment in an unmanned state;
s1004, recording and storing a reflection coefficient R3 of the current environment in an unmanned state;
s1005, initializing the light source module and controlling each light-emitting unit in the light source module to be in a closed state;
s1006, whether the dynamic and static sensors are triggered or not, namely whether the dynamic and static sensors sense that the human body moves in the current environment or not; if the dynamic and static sensors are triggered, executing step S1007; if the dynamic and static sensors are not triggered, returning to execute the step S1005;
s1007, turning on a light source, and controlling a light-emitting unit in the light source module to be in an illumination state;
s1008, the microcontroller sends a periodic signal to the driving module at the frequency f4, and the driving module drives the light source module to generate emergent light X4 at the frequency f4 based on the received periodic signal; the visible light sensor receives reflected light Y4 of light X4 reflected by the current environment, generates an electric signal based on the reflected light and outputs the electric signal to the microcontroller, and the microcontroller performs filtering based on the electric signal by taking f4 as a center to obtain a reflection coefficient R4 of the current environment;
step S1009, judge whether the present environment is unmanned through the difference of reflection coefficient R3 and reflection R4; if the difference between the reflection coefficient R3 and the reflection R4 is within + -5%, determining that the current environment is in an unmanned state, returning to the step S1005, if the difference between the reflection coefficient R3 and the reflection R4 exceeds + -5%, determining that the current environment is in a manned state, and executing the step S1008 to continuously monitor the current environment.
The embodiment of the invention provides a lighting lamp with a simple structure and more intelligence and a lighting control method based on human body induction. In addition, the scheme provided by the embodiment of the invention can judge whether a human body exists in the current environment or not and can also judge whether the human body moves or not by detecting the light reflectivity of a certain frequency in the environment, so that the lighting lamp is ensured to be in a lighting state when the human body exists in the current environment, and is kept closed when no human body exists, and the energy is saved.
It is clear to those skilled in the art that the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and for the sake of brevity, further description is omitted here.
In addition, the functional units in the embodiments of the present invention may be physically independent of each other, two or more functional units may be integrated together, or all the functional units may be integrated in one processing unit. The integrated functional units may be implemented in the form of hardware, or in the form of software or firmware.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments can be modified or some or all of the technical features can be equivalently replaced within the spirit and principle of the present invention; such modifications or substitutions do not depart from the scope of the present invention.
Claims (12)
1. A lighting fixture, comprising: the device comprises a shell, a power supply module, a microcontroller, a light source module, a driving module and at least one first sensor, wherein the power supply module and the microcontroller are packaged in the shell; wherein the content of the first and second substances,
the driving module is used for generating a driving signal under the control of the microcontroller and transmitting the driving signal to the light source module;
the light source module is used for periodically generating first emergent light rays with a first preset frequency based on a driving signal transmitted by the driving module;
the first sensor is used for receiving first reflected light after the first emergent light is reflected under the current environment, generating a first electric signal based on the first reflected light and transmitting the first electric signal to the microcontroller;
the microcontroller is further configured to analyze the first electrical signal to obtain a first reflection coefficient of the current environment, and control the illumination state of the light source module through the driving module based on the first reflection coefficient;
wherein the microcontroller is further configured to: comparing the first reflection coefficient with a second reflection coefficient, wherein the second reflection coefficient is the reflection coefficient of the current environment in an unmanned state;
when the difference value between the first reflection coefficient and the second reflection coefficient is within a first preset range, controlling the driving module to stop providing driving voltage for the light source module, and enabling a light emitting unit in the light source module to be in a closed state; and when the difference value between the first reflection coefficient and the second reflection system is within a second preset range, controlling the driving module to provide driving voltage for the light source module, and enabling a light-emitting unit in the light source module to be in an illumination state.
2. The lighting fixture of claim 1, wherein the light source module comprises a plurality of light emitting units; the light emitted by the light-emitting unit is visible light and/or non-visible light;
the microcontroller is further configured to: before controlling the driving module to generate a driving signal, judging whether a second reflection coefficient of the current environment in an unmanned state is stored in the microcontroller;
when a second reflection coefficient of the current environment in an unmanned state is stored, initializing the light source module, and controlling a light emitting unit in the light source module to be in a closed state;
and when the second reflection coefficient of the current environment in the unmanned state is not stored, controlling the light source module to emit second emergent light rays at a second preset frequency when the current environment is in the unmanned state.
3. The lighting fixture of claim 2, wherein the first sensor is further to: receiving second reflected light rays of the second emergent light rays after reflection in the current environment, and generating second electric signals based on the second reflected light rays;
the microcontroller is further used for analyzing and acquiring a second reflection coefficient of the current environment in an unmanned state based on the second electric signal.
4. The lighting fixture of claim 1, wherein the first sensor comprises a light sensor and/or an illuminance sensor; the light sensor includes: visible light sensors or non-visible light sensors.
5. The lighting fixture of claim 4, wherein said lighting fixture further comprises at least one second sensor communicatively coupled to said microcontroller for detecting the presence of a person in said current environment and transmitting a detection signal to said microcontroller;
and the microcontroller is also used for controlling the light-emitting unit in the light source module to be in a lighting state when the second sensor detects that the current environment is occupied by people.
6. The lighting fixture of claim 5, wherein the second sensor comprises a static and dynamic sensor, a microwave sensor, and/or a pyroelectric sensor.
7. A lighting control method based on human body induction, which is applied to the lighting fixture of any one of claims 1-6, and comprises the following steps:
a microcontroller in the lighting lamp controls a light source module to periodically generate first emergent light rays with a first preset frequency;
receiving a first reflected light ray of the first emergent light ray reflected under the current environment by using a first sensor in the lighting lamp, generating a first electric signal based on the first reflected light ray, and transmitting the first electric signal to the microcontroller;
the microcontroller analyzes and obtains a first reflection coefficient of the current environment according to the first electric signal, and controls the illumination state of the light source module based on the first reflection coefficient;
the controlling the illumination state of the light source module based on the first reflection coefficient comprises:
comparing the first reflection coefficient with a second reflection coefficient, wherein the second reflection coefficient is the reflection coefficient of the current environment in an unmanned state;
if the difference value of the first reflection coefficient and the second reflection coefficient is within a first preset range, controlling a light-emitting unit in the light source module to be in a closed state;
and if the difference value of the first reflection coefficient and the second reflection system is within a second preset range, controlling a light-emitting unit in the light source module to be in an illumination state.
8. The method of claim 7, wherein the microcontroller in the lighting fixture controls the light source module to generate the periodic current to emit the first light emission at the first predetermined frequency, comprising:
the microcontroller in the lighting lamp sends a driving signal with a first preset frequency to the driving module, and the driving module drives the light source module to periodically generate current to emit first emergent light rays emitting the first preset frequency.
9. The method of claim 7, wherein the microcontroller obtains a first reflection coefficient of the current environment based on the first electrical signal analysis, comprising:
and the microcontroller performs digital band-pass filtering based on the first electric signal by taking the first preset frequency as a center to acquire a first reflection coefficient of the current environment.
10. The method of claim 7, wherein before the microcontroller controls the light source module to generate the periodic current through the driving module to emit the first outgoing light with the first predetermined frequency, the method further comprises:
judging whether a second reflection coefficient of the current environment in an unmanned state is stored in the microcontroller;
if the second reflection coefficient of the current environment in the unmanned state is stored, initializing the light source module, and controlling a light-emitting unit in the light source module to be in a closed state;
if the second reflection coefficient of the current environment in the unmanned state is not stored, controlling the light source module to emit second emergent light at a second preset frequency through the microcontroller when the current environment is in the unmanned state;
receiving, by the first sensor, second reflected light of the second outgoing light after being reflected under the current environment, and generating a second electrical signal based on the second reflected light;
and the microcontroller analyzes and acquires a second reflection coefficient of the current environment in an unmanned state based on the second electric signal.
11. The method of claim 10, wherein if the light emitted by the light emitting units in the light source module is visible light, if the second reflection coefficient of the current environment in the unattended state is stored, the initializing the light source module, and after controlling the light emitting units in the light source module to be in the off state, further comprising:
judging, by the microcontroller, whether a second sensor in the lighting fixture detects the presence of a person in the current environment;
and if the second sensor detects that people exist in the current environment, the microcontroller controls the light-emitting unit in the light source module to be in a lighting state.
12. The method of claim 11, wherein the microcontroller obtains a first reflection coefficient of the current environment based on the first electrical signal analysis, and further comprises, after controlling the illumination state of the light source module based on the first reflection coefficient:
judging whether a light-emitting unit in the light source module is in an illumination state or not;
if the light-emitting unit in the light source module is in an illumination state, the microcontroller controls the light source module to generate periodic current and emit third emergent light with a third preset frequency so as to continuously monitor whether a human body exists in the current environment.
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| CN114513888A (en) * | 2021-12-31 | 2022-05-17 | 珠海雷特科技股份有限公司 | Microwave sensor group control method based on bus, computer device and computer readable storage medium |
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