CN113179570A

CN113179570A - Illuminance control method and apparatus, electronic device, and storage medium

Info

Publication number: CN113179570A
Application number: CN202110517766.7A
Authority: CN
Inventors: 林波荣; 曾云一; 孙弘历
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2021-07-27
Anticipated expiration: 2041-05-12
Also published as: WO2022237159A1; CN113179570B

Abstract

The present disclosure relates to an illuminance control method and apparatus, an electronic device, and a storage medium, the method including: acquiring a first acquisition illumination and/or a second acquisition illumination; determining a first natural illuminance according to the first lamplight illuminance and the first collection illuminance, and determining a second natural illuminance according to the second lamplight illuminance and the second collection illuminance; and determining target illumination parameters of each illumination unit according to the first target illumination and the first natural illumination, the second target illumination and the second natural illumination, and respectively controlling the operation of each illumination unit according to the determined illumination parameters. The embodiment of the disclosure controls the second position, namely the illumination near the human eyes, to achieve sufficient rhythm stimulation while ensuring the visual task requirement of the first position, meets the health requirement, considers the influence of natural illumination on the first position and the second position, the work and rest of people and the preference of the people on the target illumination, and can realize the control of the lighting system more accurately, more efficiently and more energy-saving.

Description

Illuminance control method and apparatus, electronic device, and storage medium

Technical Field

The present disclosure relates to the field of lighting technologies, and in particular, to an illuminance control method and apparatus, an electronic device, and a storage medium.

Background

Healthy lighting is a new development trend of lighting research in recent years, an indoor luminous environment not only meets visual requirements of people, but also has influence on circadian rhythm, emotion, working efficiency and the like of people, and on the other hand, a lighting system occupies a large proportion in building energy consumption, and reduction of lighting energy consumption is of great importance for building energy conservation and building operation cost saving.

Disclosure of Invention

According to an aspect of the present disclosure, there is provided an illuminance control method applied to an illuminance control system including a plurality of lighting units, the method including: acquiring a first acquisition illumination of a first position and/or a second acquisition illumination of a second position of a target area, wherein the first position is within a preset range of a working horizontal plane, and the second position is within a preset range of a vertical plane of eyes of a user; determining a first natural illuminance according to a first lighting illuminance and the first collection illuminance of the plurality of lighting units at the first position, and/or determining a second natural illuminance according to a second lighting illuminance and the second collection illuminance of the plurality of lighting units at the second position; and determining target illumination parameters of each illumination unit according to the first target illumination and the first natural illumination at the first position and/or the second target illumination and the second natural illumination at the second position, and respectively controlling the operation of each illumination unit according to the determined illumination parameters.

In one possible embodiment, the method further comprises: and determining the target lighting parameters of the lighting units by taking the minimum sum of the lighting parameters of the lighting units as a constraint condition.

In a possible embodiment, the determining a first natural light illuminance according to a first lamp light illuminance and the first collected illuminance of the plurality of lighting units at the first position includes: determining the first light illumination according to the current lighting parameters and first preset parameters of each lighting unit, wherein each first preset parameter is related to the lighting parameter of the corresponding lighting unit and the light illumination of the corresponding lighting unit at the first position; and determining the first natural illumination according to the difference between the first collection illumination and the first lamp illumination.

In a possible embodiment, the determining a second natural light illumination according to a second light illumination of the plurality of lighting units at the second position and the second collected illumination includes: determining the second light illumination according to the current lighting parameters and second preset parameters of each lighting unit, wherein each second preset parameter is related to the lighting parameter of the corresponding lighting unit and the light illumination of the corresponding lighting unit at the second position; and determining the second natural illumination according to the difference between the second collection illumination and the second lamplight illumination.

In one possible embodiment, determining the target lighting parameter of each lighting unit according to the first target illuminance and the first natural illuminance at the first position includes: determining target lighting parameters for individual lighting units according to a first condition comprising: under the action of each target illumination parameter, the sum of the illumination of the lamp light at the first position and the first natural illumination is greater than or equal to the first target illumination.

In one possible embodiment, determining the target illumination parameters of each illumination unit according to the first target illumination and the first natural illumination at the first location, the second target illumination and the second natural illumination at the second location includes: determining target lighting parameters for individual lighting units according to a second condition comprising: the sum of the lighting illuminance of each lighting unit at the first position and the first natural lighting illuminance under the action of each target lighting parameter is greater than or equal to the first target illuminance, and the sum of the lighting illuminance of each lighting unit at the second position and the second natural lighting illuminance under the action of each target lighting parameter is greater than or equal to the second target illuminance.

In one possible embodiment, the method further comprises: configuring the first target illuminance and/or the second target illuminance.

In a possible embodiment, the configuring the first target illuminance and/or the second target illuminance includes: under the condition that a target illumination configuration instruction is received, configuring the first target illumination and/or the second target illumination according to the target illumination configuration instruction; or configuring the first target illumination and/or the second target illumination according to a first preset target illumination and/or a second preset target illumination when the target illumination configuration instruction is not received and a user is not in the target area; or when the target illumination configuration instruction is not received, the user is in the target area, and the current time is within a preset time range, configuring the first target illumination and/or the second target illumination according to a third preset target illumination and/or a fourth preset target illumination; or when the target illumination configuration instruction is not received, the user is in the target area, and the current time is not within the preset time range, configuring the first target illumination and/or the second target illumination according to a fifth preset target illumination and/or a sixth preset target illumination.

According to an aspect of the present disclosure, there is provided an illuminance control apparatus applied to an illuminance control system including a plurality of lighting units, the apparatus including: the acquisition module is used for acquiring a first acquisition illumination intensity of a first position and/or a second acquisition illumination intensity of a second position of the target area, wherein the first position is within a preset range of a working horizontal plane, and the second position is within a preset range of a vertical plane of eyes of a user; the first determining module is connected to the acquiring module and used for determining first natural illuminance according to the first lighting illuminance and the first collection illuminance of the plurality of lighting units at the first position, and/or determining second natural illuminance according to the second lighting illuminance and the second collection illuminance of the plurality of lighting units at the second position; and the second determining module is connected to the first determining module and is used for determining target lighting parameters of each lighting unit according to the first target illumination and the first natural illumination at the first position and/or the second target illumination and the second natural illumination at the second position and respectively controlling the work of each lighting unit according to the determined lighting parameters.

According to an aspect of the present disclosure, there is provided an electronic device including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to invoke the memory-stored instructions to perform the above-described method.

According to an aspect of the present disclosure, there is provided a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the above-described method.

By the above method, the embodiment of the present disclosure may obtain a first collected illuminance at a first position and/or a second collected illuminance at a second position of a target area, determine a first natural illuminance according to a first lamplight illuminance and the first collected illuminance of a plurality of lighting units at the first position, and/or determine a second natural illuminance according to a second lamplight illuminance and the second collected illuminance of a plurality of lighting units at the second position, determine a target lighting parameter of each lighting unit according to the first target illuminance and the first natural illuminance at the first position, and/or determine a target lighting parameter of each lighting unit according to the second target illuminance and the second natural illuminance at the second position, and control the operation of each lighting unit according to each determined lighting parameter, while ensuring a visual task requirement at the first position, the second position, namely the illumination near the human eyes is controlled to achieve enough rhythm stimulation, the health requirement is met, the influence of natural illumination on the first position and the second position, the work and rest of people and the preference of the people for the target illumination are considered simultaneously to determine the illumination parameters of each illumination unit, and the control of the illumination system can be realized more accurately, more efficiently and more energy-saving.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure.

Fig. 1 illustrates a flow diagram of an illuminance control method according to an implementation of the present disclosure.

FIG. 2 shows a schematic diagram of sensitivity curves of a human visual system and a rhythm stimulation system according to an embodiment of the present disclosure.

Fig. 3a shows a top view and fig. 3b shows a front view of an application scenario according to an embodiment of the present disclosure.

Fig. 4 shows a flowchart of an illuminance control method according to an embodiment of the present disclosure.

Fig. 5 illustrates a schematic diagram of an illuminance control method according to an embodiment of the present disclosure.

FIG. 6 shows a schematic diagram of a daylight spectral distribution and a spectral distribution of an LED lamp with a color temperature of 5500K according to an embodiment of the present disclosure.

Fig. 7, 8, 9 show the duty cycle illumination requirement diagrams for 3 sets of stations inboard, intermediate and near the window according to an embodiment of the present disclosure.

Fig. 10 shows a schematic view of illumination parameters when the illuminance control method according to an embodiment of the present disclosure is applied.

Fig. 11, 12, 13 show working period illumination diagrams for 3 sets of stations inboard, intermediate and near the window according to an embodiment of the present disclosure.

Fig. 14 illustrates a block diagram of an illuminance control apparatus according to an embodiment of the present disclosure.

Fig. 15 shows a block diagram of an illumination control system according to an embodiment of the present disclosure.

FIG. 16 shows a block diagram of an electronic device in accordance with an embodiment of the present disclosure.

FIG. 17 shows a block diagram of an electronic device according to an embodiment of the present disclosure.

Detailed Description

Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

In the description of the present disclosure, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and, therefore, should not be taken as limiting the present disclosure.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.

In the present disclosure, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the term "at least one" herein means any one of a plurality or any combination of at least two of a plurality, for example, including at least one of A, B, C, and may mean including any one or more elements selected from the group consisting of A, B and C.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present disclosure.

Referring to fig. 1, fig. 1 is a flowchart illustrating an illuminance control method according to an embodiment of the present disclosure.

The method is applied to an illumination control system comprising a plurality of lighting units, as shown in fig. 1, and comprises:

step S11, acquiring a first acquisition illumination of a first position and/or a second acquisition illumination of a second position of the target area, wherein the first position is within a preset range of a working horizontal plane, and the second position is within a preset range of a vertical plane of eyes of a user;

step S12, determining a first natural illuminance according to a first lighting illuminance and the first collected illuminance of the plurality of lighting units at the first position, and/or determining a second natural illuminance according to a second lighting illuminance and the second collected illuminance of the plurality of lighting units at the second position;

step S13, determining target lighting parameters of each lighting unit according to the first target illuminance and the first natural illuminance at the first position, and/or the second target illuminance and the second natural illuminance at the second position, and controlling the operation of each lighting unit according to the determined lighting parameters.

By the above method, the embodiment of the present disclosure may obtain a first collected illuminance at a first position and/or a second collected illuminance at a second position of a target area, determine a first natural illuminance according to a first lamplight illuminance and the first collected illuminance of a plurality of lighting units at the first position, and/or determine a second natural illuminance according to a second lamplight illuminance and the second collected illuminance of a plurality of lighting units at the second position, determine a target lighting parameter of each lighting unit according to the first target illuminance and the first natural illuminance at the first position, and/or determine a target lighting parameter of each lighting unit according to the second target illuminance and the second natural illuminance at the second position, and control the operation of each lighting unit according to each determined lighting parameter, while ensuring a visual task requirement at the first position, the second position, namely the illumination near the human eyes, is controlled to achieve enough rhythm stimulation to meet the health requirement, and the influence of the natural illumination on the first position and the second position is considered simultaneously to determine the illumination parameters of each illumination unit, so that the control of the illumination system can be realized more accurately, more efficiently and more energy-saving.

In one possible embodiment, the lighting unit may include any one or more of an LCD (Liquid Crystal Display), an LED (Light Emitting Diode), a Mini LED (Mini Light Emitting Diode), a Micro LED (Micro Light Emitting Diode), and an OLED (Organic Light-Emitting Diode).

In a possible implementation manner, the second target illuminance of the embodiment of the present disclosure may be obtained according to an Equivalent blackout pixel illuminance (EML), so as to implement an adjustment of the illuminance of each lighting unit of the lighting system based on the health requirement.

Referring to fig. 2, fig. 2 shows a schematic diagram of sensitivity curves of a human visual system and a rhythm stimulation system according to an embodiment of the present disclosure.

In one example, as shown in FIG. 2, the demand for a visual task is measured by luminance, while the health demand for a rhythmic stimulus is measured by the equivalent melanopsin luminance. The disclosed embodiments use the sensitivity curve and the spectral distribution at the human eye to derive the conversion coefficient (R) between the equivalent blackant illumination (EML) and the illumination (L), i.e., EML ═ R × L. Generally, for office scenes, the vision task requires a desktop illumination of 300lux, and the rhythm stimulation requires a human eye to reach 200EML in a preset time period (such as a 9: 00-13: 00 time period), which can be used as a default value of the second target illumination in healthy lighting.

In a possible implementation manner, the illuminance control method according to the embodiment of the disclosure may be applied to an office building or other places having a plurality of workstations and arranged with lighting systems, where the target area according to the embodiment of the disclosure may be an area where a certain workstation is located, the first position may be a desktop position of an office desk, and the second position may be a position where the eyes of an office worker (user) are located when standing or sitting.

The embodiment of the present disclosure does not limit a specific implementation manner of acquiring the first collected illuminance at the first position and/or the second collected illuminance at the second position of the target area in step S11, and in one example, a sensor may be disposed at a corresponding position to collect the illuminance, and in other examples, the corresponding first collected illuminance and/or the second collected illuminance may also be calculated from data monitored at other positions.

Referring to fig. 3a and 3b, fig. 3a shows a top view of an application scenario according to an embodiment of the present disclosure, and fig. 3b shows a front view of the application scenario according to an embodiment of the present disclosure.

In an example, as shown in fig. 3a and 3b, in the embodiment of the present disclosure, the illuminance sensor may be correspondingly disposed according to specific positions of the first position and the second position to acquire the first collected illuminance at the first position and/or the second collected illuminance at the second position, and assuming that the distance between the office desk top and the ground is 0.75m and the distance between the human eye and the desk top is 1.2 m, the illuminance sensor acquiring the first collected illuminance at the first position may be horizontally installed at a position at the height of the office desk top, and the illuminance sensor acquiring the second collected illuminance at the second position may be vertically installed at a position at the height of the human eye.

In one example, as shown in fig. 3a and 3b, a lighting unit (luminaire) may be disposed at the top of an office area.

Of course, the above descriptions of the installation manners of the illuminance sensor, the lighting device, and the like are exemplary and should not be considered as limiting the embodiments of the present disclosure, and in other embodiments, the illuminance sensor may have other installation manners, such as being installed on a ceiling, and also being capable of directly measuring natural lighting toward a lighting window. For ceiling and lighting window oriented installations, the illuminance provided by daylight can be calculated by the relevant art according to room parameters.

In a possible embodiment, the lighting parameters may include electrical parameters (such as current, voltage, etc.) for driving the lighting unit to emit light, or lighting levels or gears of the lighting unit, at which the lighting unit has different light-emitting luminances.

The methods of the embodiments of the present disclosure may be performed by processing components, including but not limited to a single processor, or discrete components, or a combination of a processor and discrete components. The processor may comprise a controller having functionality to execute instructions in an electronic device, which may be implemented in any suitable manner, e.g., by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components. Within the processor, the executable instructions may be executed by hardware circuits such as logic gates, switches, Application Specific Integrated Circuits (ASICs), programmable logic controllers, and embedded microcontrollers.

Referring to fig. 4, fig. 4 is a flowchart illustrating an illuminance control method according to an embodiment of the disclosure.

In one possible embodiment, as shown in fig. 4, the method may further include:

in step S14, the target lighting parameters of each lighting unit are determined with the minimum sum of the lighting parameters of each lighting unit as a constraint condition.

According to the embodiment of the disclosure, when the target illumination parameters of each illumination unit are determined according to the first target illumination and the first natural illumination at the first position and/or the second target illumination and the second natural illumination at the second position, the target illumination parameters of each illumination unit are determined by taking the minimum sum of the illumination parameters of each illumination unit as a constraint condition, so that energy can be further saved, the visual task needs of people can be guaranteed at the desktop illumination with the lowest energy consumption, the spectral distribution and the illumination of the illumination at the eyes of the people can be controlled to achieve sufficient rhythm stimulation, and the health needs can be met.

In a possible embodiment, the step S12 determining a first natural light illuminance according to a first light illuminance of a plurality of lighting units at the first position and the first collected illuminance may include:

determining the first light illumination according to the current lighting parameters and first preset parameters of each lighting unit, wherein each first preset parameter is related to the lighting parameter of the corresponding lighting unit and the light illumination of the corresponding lighting unit at the first position;

and determining the first natural illumination according to the difference between the first collection illumination and the first lamp illumination.

In a possible embodiment, the determining a second natural light illumination according to a second light illumination of the plurality of lighting units at the second position and the second collected illumination includes:

determining the second light illumination according to the current lighting parameters and second preset parameters of each lighting unit, wherein each second preset parameter is related to the lighting parameter of the corresponding lighting unit and the light illumination of the corresponding lighting unit at the second position;

and determining the second natural illumination according to the difference between the second collection illumination and the second lamplight illumination.

In one example, the illumination provided by lighting unit i at the desktop and human eyes of target area (e.g., workstation) j and the lighting parameters (e.g., gear) D of the lighting unit at the current time_i,τIn direct proportion, the first predetermined parameter and the second predetermined parameter are k_ij，z(Table illuminance-coefficient of gear position) and k_ij，y(human eye illumination-coefficient of gear), wherein i and j are integers. The sizes of the first preset parameter and the second preset parameter in the embodiments of the present disclosure are not limited, and those skilled in the art may set the first preset parameter and the second preset parameter according to actual situations, for example, the first preset parameter and the second preset parameter may be obtained through analog calculation or actual measurement.

In one exampleIn the above embodiment, the illumination intensity provided by the lighting unit i at the first position at the station j may be a product of a first preset parameter and a current lighting parameter, i.e. k_ij，z*D_i,τThe illumination provided by the lighting unit i at the second position at the station j can be the product of the second preset parameter and the current lighting parameter, i.e. k_ij，y*D_i，τWherein τ represents time, D_i，τRepresenting the lighting parameter, D, of the lighting unit i at the current instant τ_i，τ+1The illumination parameters of the illumination unit i at the time τ +1 are represented, and the illumination parameters at the next time can be obtained by the illumination control method of the embodiment of the disclosure, so that the requirement of normal working illumination is met, and the requirements of health management and energy conservation are met.

In one example, at each workstation j, a first light illumination L 'provided by the plurality of lighting units at a first location'_jz,τCan be shown as equation 1:

wherein m represents the total number of lighting units.

In one example, at each workstation j, a second light illumination L 'provided by the plurality of lighting units at the second location'_jy,τCan be shown as equation 2:

in one example, the first and second collected illuminances obtained in step S11 can be respectively denoted as L_jz,τAnd L_jy,τ. The first natural light illumination provided by natural light at the first position of the station (j) at the current moment tau is recorded as S_jz,τAnd recording a second natural light illumination provided by the natural light at the second position of the station (j) at the current moment tau as S_jy,τThe natural light providing illumination at station j may be the detected total illumination minus the illumination provided by the lighting unit, i.e.,

in one example, the first natural illuminance may be determined according to a difference between the first collected illuminance and the first lamp illuminance, as shown in formula 3:

S_jz,τ＝L_jz,τ-L′_jz,τequation 3

In one example, the second natural illuminance may be determined according to a difference between the second collected illuminance and the second lamp illuminance, as shown in formula 4:

S_jy,τ＝L_jy,τ-L′_jy,τequation 4

In one example, the illumination (L) and the equivalent blackcurrant illumination (EML) are both superimposable, i.e., for multiple light sources, the illumination may be determined by equation 5 and the equivalent blackcurrant illumination may be determined by equation 6:

L＝∑L_iequation 5

EML＝∑(R_i*L_i) Equation 6

In one example, since the spectral distributions of the natural light and the lamp light may be considered to be constant, the conversion coefficient (Rs) of the natural light and the conversion coefficient (Ri) of the lamp light may be set in advance according to the spectral characteristics. For the case of the light spectrum change, the conversion coefficient Ri of the changed light spectrum may be calculated according to the sensitivity curve shown in fig. 2, and of course, the specific determination manner of the conversion coefficient and the specific size of the conversion coefficient are not limited in the embodiment of the present disclosure, and those skilled in the art may determine the conversion coefficient Ri according to needs and actual situations.

In one possible implementation, the step S13 of determining the target lighting parameters of each lighting unit according to the first target illuminance at the first position and the first natural illuminance may include:

determining target lighting parameters for the respective lighting units based on a first condition,

the first condition includes: under the action of each target illumination parameter, the sum of the illumination of the lamp light at the first position and the first natural illumination is greater than or equal to the first target illumination.

In one possible embodiment, the step S13 determining the target lighting parameters of each lighting unit according to the first target illuminance and the first natural illuminance at the first position, the second target illuminance and the second natural illuminance at the second position, may include:

determining target lighting parameters for the respective lighting units based on a second condition,

the second condition includes: the sum of the lighting illuminance of each lighting unit at the first position and the first natural lighting illuminance under the action of each target lighting parameter is greater than or equal to the first target illuminance, and the sum of the lighting illuminance of each lighting unit at the second position and the second natural lighting illuminance under the action of each target lighting parameter is greater than or equal to the second target illuminance.

In one example, the first condition may be as shown in equation 7, and the second condition may be as shown in equations 7 and 8.

∑(k_ij，z*D_i,τ+1)+S_jz,τ≥L_jEquation 7

∑(R_i*k_ij，y*D_i,τ+1)+R_s*S_jz,τ≥EML_jEquation 8

For different time periods, the disclosed embodiments may determine the target lighting parameters of each lighting unit according to the above methods, respectively, for example, outside a preset time period, the illumination effect at the human eye may not be considered, so the target lighting parameters of each lighting unit are determined according to the first condition, and inside the preset time period, the illumination effect at the human eye needs to be considered at the same time, so the disclosed embodiments determine the target lighting parameters of each lighting unit according to the second condition in this case.

In one possible implementation, the disclosed embodiments may solve equation 7 or equation 7 and equation 8 to obtain the target illumination parameters for multiple groups of illumination units, in which case the disclosed embodiments may use the minimum sum of the illumination parameters for each illumination unit as the constraint (Min ∑ D) for the minimum sum of the illumination parameters for each illumination unit_i,τ+1) Determining the target lighting parameters for each lighting unit, i.e. solving equation 7 or 7 and 8, may result in multiple sets of target illuminationThe bright parameters satisfy formula 7 or satisfy formula 7 and formula 8, and since the power of the lamp is proportional to the gear, in order to minimize the energy consumption of the lighting system, the embodiment of the present disclosure selects a group of lighting parameters with the smallest sum of the lighting parameters of the lighting units as the target lighting parameters.

In one possible embodiment, as shown in fig. 4, the method may further include:

step S10, configuring the first target illuminance and/or the second target illuminance.

In a possible implementation, the step S10 of configuring the first target illuminance and/or the second target illuminance may include:

under the condition that a target illumination configuration instruction is received, configuring the first target illumination and/or the second target illumination according to the target illumination configuration instruction; or

Configuring the first target illumination and/or the second target illumination according to a first preset target illumination and/or a second preset target illumination under the condition that the target illumination configuration instruction is not received and a user is not in the target area; or

Under the conditions that the target illumination configuration instruction is not received, the user is in the target area, and the current time is within a preset time range, configuring the first target illumination and/or the second target illumination according to a third preset target illumination and/or a fourth preset target illumination; or

And under the conditions that the target illumination configuration instruction is not received, the user is in the target area, and the current time is not within a preset time range, configuring the first target illumination and/or the second target illumination according to a fifth preset target illumination and/or a sixth preset target illumination.

The first target illumination and the second target illumination can be configured according to various modes, so that the environmental adaptability and the flexibility of the control of the lighting system are improved.

The configuration of the first target illuminance and/or the second target illuminance at step S10 will be described in an exemplary manner.

Referring to fig. 5, fig. 5 is a schematic diagram illustrating an illuminance control method according to an embodiment of the disclosure.

In one example, as shown in fig. 5, a worker may set a first target illumination and a second target illumination of a first location and/or a second location by using a remote controller, a touch panel, a mobile phone app, and the like, and since the worker may subjectively set the illumination of any workstation at any time, the embodiment of the present disclosure first determines whether a person sets each workstation.

In one example, as shown in fig. 5, for a workstation with a set position (Aj ═ 1), the first target illumination and the second target illumination of the first position and/or the second position may be set by a human, so as to ensure the satisfaction degree of individuals with different illumination preferences. If not, continuing to perform the next judgment.

In one example, as shown in fig. 5, it is determined whether a person is present at an unset workstation (Aj is 0), and whether the person is present may be determined by, but not limited to, a human body sensor (e.g., positioning method such as NFC card and WiFi, face recognition, human body recognition, etc.), and the like

In one example, as shown in fig. 5, for each workstation, if the person is not present (Bj ═ 0), the workstation desktop should provide the illumination of the background lighting to ensure the uniformity of the indoor light environment. For example, the default illumination of the desktop of the station in the on-position state is 300lux, the default illumination of the background illumination which is not on-position state can be set to be 100lux (the first preset target illumination), so that the eye comfort degree is ensured, and the energy-saving effect is achieved.

In one example, as shown in fig. 5, it is further determined whether the current time is within a preset time period (e.g., 9: 00-13: 00) for a workstation (Bj ═ 1) where a person is present. If not in the time period (Cj is 0), the desktop illumination of the workstation is the working illumination default value, for example, the desktop working illumination default illumination is set to 300 lux.

In one example, as shown in fig. 5, if the current time is in a preset time period (Cj ═ 1), the desktop and human eye illuminance of the workstation assume default values of healthy lighting, for example, the desktop illuminance is set to 300lux and the equivalent blackant illuminance at the human eye is set to 200 EML.

In this way, the embodiments of the present disclosure may configure the first target illuminance and/or the second target illuminance according to various situations to improve flexibility of control of the lighting system.

Referring to fig. 6, fig. 6 is a schematic diagram illustrating a spectral distribution of sunlight and an LED lamp with a color temperature of 5500K according to an embodiment of the present disclosure.

In one example, the daylight (natural light) and the equivalent blackout pixel luminance conversion factor of the LED lamp are R respectively_s＝0.9364，R_l0.9941. Actually measuring to obtain the illumination-gear coefficient (k) of the LED lamp_ij，zAnd k_ij，y) As shown in table 1.

TABLE 1

According to typical office work and rest, 9: 00-17: 00 is working period, 12: 00-13: and 00 is the lunch break outgoing time.

Referring to fig. 7, 8 and 9, fig. 7, 8 and 9 are schematic diagrams illustrating the illumination requirement of 3 groups of stations at the inner side, the middle side and the window in the working period according to an embodiment of the disclosure.

In one example, as shown in fig. 7, 8, 9, embodiments of the present disclosure distinguish between the needs of a person setting, background lighting, task lighting, and health lighting, it being understood that this example is a typical office lighting need, and so on for situations where lighting needs are different.

Referring to fig. 10, fig. 10 is a schematic diagram illustrating an illumination parameter (gear) when the illuminance control method according to an embodiment of the disclosure is applied.

As shown in fig. 10, for different time periods, when the illuminance control method according to the embodiment of the present disclosure is applied to determine the lighting parameters of each lighting unit (three lighting units, as shown in fig. 3a and 3 b), according to the different time periods, the embodiment of the present disclosure adaptively adjusts the lighting parameters of each lighting unit in combination with the influence of natural illuminance and the influence of healthy lighting, so as to meet the lighting requirements, the energy saving requirements, and the health requirements.

Referring to fig. 11, 12 and 13, fig. 11, 12 and 13 are schematic views illustrating the illuminance of 3 groups of stations at the inner side, the middle side and the window in the working period according to an embodiment of the disclosure.

As shown in fig. 11, 12 and 13, under the daylight condition of 3 groups of stations with different distances from the window, the illumination of the desktop and the illumination of human eyes are respectively complemented by the light according to the requirement, and the control strategy of the lighting system achieves a good energy-saving effect.

In summary, the embodiment of the present disclosure comprehensively considers the people's work and rest, the sunlight utilization, the people's preference and the active and passive combination lighting system control method of healthy rhythm, so as to realize the lowest energy consumption and meet the requirements of visual task and rhythm stimulation.

Referring to fig. 14, fig. 14 is a block diagram of an illuminance control device according to an embodiment of the present disclosure.

The apparatus is applied to an illuminance control system including a plurality of lighting units, as shown in fig. 14, and includes:

the acquisition module 10 is configured to acquire a first acquisition illumination at a first position and/or a second acquisition illumination at a second position of the target area, where the first position is within a preset range of a working horizontal plane and the second position is within a preset range of a vertical plane of eyes of a user;

a first determining module 20, connected to the obtaining module 10, configured to determine a first natural illuminance according to a first lighting illuminance and the first collected illuminance of the multiple lighting units at the first position, and/or determine a second natural illuminance according to a second lighting illuminance and the second collected illuminance of the multiple lighting units at the second position;

the second determining module 30 is connected to the first determining module 20, and configured to determine target lighting parameters of each lighting unit according to the first target illuminance and the first natural illuminance at the first position, and/or the second target illuminance and the second natural illuminance at the second position, and respectively control the operation of each lighting unit according to the determined lighting parameters.

With the above apparatus, the embodiment of the present disclosure may obtain a first collected illuminance at a first position and/or a second collected illuminance at a second position of a target area, determine a first natural illuminance according to a first lamplight illuminance and the first collected illuminance of a plurality of lighting units at the first position, and/or determine a second natural illuminance according to a second lamplight illuminance and the second collected illuminance of a plurality of lighting units at the second position, determine a target lighting parameter of each lighting unit according to the first target illuminance and the first natural illuminance at the first position, and/or determine a target lighting parameter of each lighting unit according to the second target illuminance and the second natural illuminance at the second position, and control the operation of each lighting unit according to each determined lighting parameter, while ensuring a visual task requirement at the first position, the second position, namely the illumination near the human eyes, is controlled to achieve enough rhythm stimulation to meet health requirements, and the influence of natural illumination on the first position and the second position, the work and rest of people and the preference of people are simultaneously considered to determine the illumination parameters of each illumination unit, so that the control of the illumination system can be realized more accurately, more efficiently and more energy-saving.

In a possible implementation, the second determining module is further configured to: and determining the target lighting parameters of the lighting units by taking the minimum sum of the lighting parameters of the lighting units as a constraint condition.

In a possible embodiment, the apparatus further comprises: a configuration module to configure the first target illuminance and/or the second target illuminance.

It should be noted that the illuminance control apparatus is an item of apparatus corresponding to the illuminance control method, and for a specific description, reference is made to the description of the illuminance control method, which is not repeated herein.

Referring to fig. 15, fig. 15 is a block diagram of an illuminance control system according to an embodiment of the present disclosure.

As shown in fig. 15, the system may include a person determination device 110, an active control device 120, an illuminance acquisition device 130, a processing device 140, and a lighting controller 150, where the person determination device 110 may determine the presence of a person, the active control device 120 may collect preferences of the person for brightness, a worker may set a target illuminance through the active control device 120, the illuminance acquisition device 130 may collect an illuminance condition of a target area, and the processing device 140 may obtain a gear or other lighting parameters to which a lighting unit should be adjusted according to the foregoing method for determining the target lighting parameters, and perform the operation through the lighting controller 150, so as to control each lighting unit in the lighting system.

The embodiments of the present disclosure do not limit the specific implementation manners of the human determination device 110, the active control device 120, the illuminance acquisition device 130, the processing device 140 and the lighting controller 150, and those skilled in the art may set the implementation manners as needed, for example, the processing device 140 may be implemented by an electronic device or a processor.

It is understood that the embodiments of the methods and apparatuses mentioned in the present disclosure can be combined with each other to form a combined embodiment without departing from the logic of the principle, which is limited by the space, and the detailed description of the present disclosure is omitted. Those skilled in the art will appreciate that in the above methods of the specific embodiments, the specific order of execution of the steps should be determined by their function and possibly their inherent logic.

Various aspects of the embodiment of the disclosure are directed to the health lighting requirements which are continuously developed in recent years, the eye illuminance is introduced as a control amount, sufficient rhythm stimulation can be provided for personnel through lighting, so that the work efficiency is improved, a good circadian rhythm is maintained, two lighting energy-saving modes of personnel work and rest and sunlight utilization are considered, relevant information is collected through an illuminance sensor, the illuminance complemented by lamplight is calculated, the automatic adjustment of a lighting system is performed, different preferences of the personnel on the light environment are considered, and the possibility of automatic adjustment is provided for the personnel.

In one possible embodiment, the processing device 140 may be provided as a terminal, server, or other form of device.

FIG. 16 shows a block diagram of an electronic device in accordance with an embodiment of the present disclosure. For example, the electronic device 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, or the like terminal. Referring to fig. 16, electronic device 800 may include one or more of the following components: processing component 802, memory 804, power component 806, multimedia component 808, audio component 810, input/output (I/O) interface 812, sensor component 814, and communication component 816.

The processing component 802 generally controls overall operation of the electronic device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operations at the electronic device 800. Examples of such data include instructions for any application or method operating on the electronic device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

The power supply component 806 provides power to the various components of the electronic device 800. The power components 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 800.

The multimedia component 808 includes a screen that provides an output interface between the electronic device 800 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the electronic device 800 is in an operation mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the electronic device 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for the electronic device 800. For example, the sensor assembly 814 may detect an open/closed state of the electronic device 800, the relative positioning of components, such as a display and keypad of the electronic device 800, the sensor assembly 814 may also detect a change in the position of the electronic device 800 or a component of the electronic device 800, the presence or absence of user contact with the electronic device 800, orientation or acceleration/deceleration of the electronic device 800, and a change in the temperature of the electronic device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a Complementary Metal Oxide Semiconductor (CMOS) or Charge Coupled Device (CCD) image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate wired or wireless communication between the electronic device 800 and other devices. The electronic device 800 may access a wireless network based on a communication standard, such as a wireless network (WiFi), a second generation mobile communication technology (2G) or a third generation mobile communication technology (3G), or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the electronic device 800 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer-readable storage medium, such as the memory 804, is also provided that includes computer program instructions executable by the processor 820 of the electronic device 800 to perform the above-described methods.

For example, the electronic device 1900 may be provided as a server. Referring to fig. 17, electronic device 1900 includes a processing component 1922 further including one or more processors and memory resources, represented by memory 1932, for storing instructions, e.g., applications, executable by processing component 1922. The application programs stored in memory 1932 may include one or more modules that each correspond to a set of instructions. Further, the processing component 1922 is configured to execute instructions to perform the above-described method.

The electronic device 1900 may further include a power component 1926 configured to perform power management of the electronic device 1900, a wired or wireless network interface 1950 being providedConfigured to connect the electronic device 1900 to a network, and an input-output (I/O) interface 1958. The electronic device 1900 may operate based on an operating system, such as the Microsoft Server operating system (Windows Server), stored in the memory 1932^TM) Apple Inc. of the present application based on the graphic user interface operating System (Mac OS X)^TM) Multi-user, multi-process computer operating system (Unix)^TM) Free and open native code Unix-like operating System (Linux)^TM) Open native code Unix-like operating System (FreeBSD)^TM) Or the like.

In an exemplary embodiment, a non-transitory computer readable storage medium, such as the memory 1932, is also provided that includes computer program instructions executable by the processing component 1922 of the electronic device 1900 to perform the above-described methods.

The present disclosure may be systems, methods, and/or computer program products. The computer program product may include a computer-readable storage medium having computer-readable program instructions embodied thereon for causing a processor to implement various aspects of the present disclosure.

The computer readable storage medium may be a tangible device that can hold and store the instructions for use by the instruction execution device. The computer readable storage medium may be, for example, but is not limited to, an electronic memory device, a magnetic memory device, an optical memory device, an electromagnetic memory device, a semiconductor memory device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a Static Random Access Memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, a mechanical coding device, such as punch cards or in-groove projection structures having instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media as used herein is not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission medium (e.g., optical pulses through a fiber optic cable), or electrical signals transmitted through electrical wires.

The computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to a respective computing/processing device, or to an external computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. The network adapter card or network interface in each computing/processing device receives computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in the respective computing/processing device.

The computer program instructions for carrying out operations of the present disclosure may be assembler instructions, Instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, the electronic circuitry that can execute the computer-readable program instructions implements aspects of the present disclosure by utilizing the state information of the computer-readable program instructions to personalize the electronic circuitry, such as a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA).

Various aspects of the present disclosure are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-readable program instructions.

These computer-readable program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer-readable program instructions may also be stored in a computer-readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer-readable medium storing the instructions comprises an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.

The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

The computer program product may be embodied in hardware, software or a combination thereof. In an alternative embodiment, the computer program product is embodied in a computer storage medium, and in another alternative embodiment, the computer program product is embodied in a Software product, such as a Software Development Kit (SDK), or the like.

Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An illuminance control method applied to an illuminance control system including a plurality of lighting units, the method comprising:

acquiring a first acquisition illumination of a first position and/or a second acquisition illumination of a second position of a target area, wherein the first position is within a preset range of a working horizontal plane, and the second position is within a preset range of a vertical plane of eyes of a user;

determining a first natural illuminance according to a first lighting illuminance and the first collection illuminance of the plurality of lighting units at the first position, and/or determining a second natural illuminance according to a second lighting illuminance and the second collection illuminance of the plurality of lighting units at the second position;

and determining target illumination parameters of each illumination unit according to the first target illumination and the first natural illumination at the first position and/or the second target illumination and the second natural illumination at the second position, and respectively controlling the operation of each illumination unit according to the determined illumination parameters.

2. The method of claim 1, further comprising:

and determining the target lighting parameters of the lighting units by taking the minimum sum of the lighting parameters of the lighting units as a constraint condition.

3. The method of claim 1, wherein determining a first natural light illumination from a first lighting illumination of a plurality of lighting units at the first location and the first collected illumination comprises:

4. The method of claim 1, wherein determining a second natural light illumination from a second lighting illumination of a plurality of lighting units at the second location and the second collected illumination comprises:

5. The method of claim 1, wherein determining the target lighting parameters of each lighting unit according to the first target illuminance at the first location and the first natural illuminance comprises:

6. The method of claim 1, wherein determining the target lighting parameters of each lighting unit according to the first target illuminance and the first natural illuminance at the first location, the second target illuminance and the second natural illuminance at the second location comprises:

7. The method of claim 1, further comprising:

configuring the first target illuminance and/or the second target illuminance.

8. The method of claim 7, wherein the configuring the first target illuminance and/or the second target illuminance comprises:

9. An illuminance control apparatus applied to an illuminance control system including a plurality of lighting units, the apparatus comprising:

the acquisition module is used for acquiring a first acquisition illumination intensity of a first position and/or a second acquisition illumination intensity of a second position of the target area, wherein the first position is within a preset range of a working horizontal plane, and the second position is within a preset range of a vertical plane of eyes of a user;

the first determining module is connected to the acquiring module and used for determining first natural illuminance according to the first lighting illuminance and the first collection illuminance of the plurality of lighting units at the first position, and/or determining second natural illuminance according to the second lighting illuminance and the second collection illuminance of the plurality of lighting units at the second position;

and the second determining module is connected to the first determining module and is used for determining target lighting parameters of each lighting unit according to the first target illumination and the first natural illumination at the first position and/or the second target illumination and the second natural illumination at the second position and respectively controlling the work of each lighting unit according to the determined lighting parameters.

10. An electronic device, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to invoke the memory-stored instructions to perform the method of any one of claims 1 to 8.

11. A computer readable storage medium having computer program instructions stored thereon, which when executed by a processor implement the method of any one of claims 1 to 8.