CN109740112B - Lighting device control method and device, storage medium and lighting device - Google Patents
Lighting device control method and device, storage medium and lighting device Download PDFInfo
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Abstract
The invention relates to a lighting device control method, a lighting device control device, a storage medium and a lighting device. The lighting equipment control method comprises the following steps: starting the microwave device, and controlling the microwave device to emit electromagnetic waves with preset frequency; receiving the echo of the electromagnetic wave, and mixing the electromagnetic wave and the echo thereof to generate an intermediate frequency signal; carrying out fast Fourier transform on a plurality of groups of intermediate frequency signals in a set period to obtain the frequency spectrum energy of the plurality of groups of intermediate frequency signals in the set period; performing superposition operation on the spectrum energy according to the frequency in the spectrum energy to obtain the total spectrum energy in the set period; and if the total energy of the frequency spectrum is larger than a threshold value, driving the lighting equipment to turn on lighting. The control method of the lighting equipment improves the anti-interference capability of the microwave inductor in the lighting lamp and reduces the probability of wrong operation of the lighting lamp.
Description
Technical Field
The present invention relates to the field of lighting control, and in particular, to a method and an apparatus for controlling a lighting device, a storage medium, and a lighting device.
Background
In recent years, auto-induction lamps are widely used in garage, corridor and other environments, the existing auto-induction lamps are mainly microwave induction lamps, microwaves are short-wavelength and high-frequency electromagnetic waves, and the auto-induction lamps are characterized by being sensitive to environmental changes in an action range, so that the microwaves can be used for detecting the environmental changes. The microwave sensor mainly comprises a microwave oscillator and a microwave antenna. A microwave oscillator is a device that generates microwaves. An oscillation signal generated by a microwave oscillator is radiated through a microwave antenna. The structure and shape of the microwave antenna determine the transmitting direction and coverage range of the microwave signal, the microwave transmitted by the transmitting antenna is absorbed or reflected when encountering the object to be detected, the receiving antenna is used for receiving the microwave signal reflected by the object to be detected, and then the microwave signal is mixed with the oscillation signal to generate an intermediate frequency signal, according to the Doppler principle, the frequency of the intermediate frequency signal comprises the speed information of the moving object, the amplitude of the intermediate frequency signal comprises the distance information between the moving object and the microwave sensor, in the prior art, the amplitude of the intermediate frequency signal is mainly used as the effective criterion for judging whether to light the lamp, however, the amplitude of the intermediate frequency signal has poor inhibition capability on the interference signal, error action is easily caused, and for the long-distance weak signal, the requirement of judging threshold cannot be met, and the microwave signal cannot be detected by the lamp.
Disclosure of Invention
Based on this, the present invention provides a lighting device control method, which improves the anti-interference capability of a microwave sensor in a lighting fixture and reduces the probability of false operation of the lighting fixture.
The invention is implemented by the following scheme:
a lighting device control method comprising the steps of:
starting the microwave device, and controlling the microwave device to emit electromagnetic waves with preset frequency;
receiving the echo of the electromagnetic wave, and mixing the electromagnetic wave and the echo thereof to generate an intermediate frequency signal;
carrying out fast Fourier transform on a plurality of groups of intermediate frequency signals in a set period to obtain the frequency spectrum energy of the plurality of groups of intermediate frequency signals in the set period;
performing superposition operation on the spectrum energy according to the frequency in the spectrum energy to obtain the total spectrum energy in the set period;
and if the total energy of the frequency spectrum is larger than a threshold value, driving the lighting equipment to turn on lighting.
According to the lighting equipment control method, the intermediate frequency signals are subjected to fast Fourier transform, the converted spectrum energy is subjected to superposition operation, and when the total energy of the spectrum is larger than the threshold value, the lighting equipment is driven to start lighting, so that the anti-interference capability of the microwave inductor of the lighting equipment is improved and the probability of misoperation of the microwave inductor is reduced on the premise of not reducing the sensitivity.
In one embodiment, the obtaining the total spectral energy in the set period by performing a superposition operation on the spectral energy according to the frequency in the spectral energy includes:
selecting the spectrum energy within a set range, wherein the frequency within the set range is less than 50 Hz;
and performing superposition operation on the selected partial frequency spectrum energy to obtain the total frequency spectrum energy in the set period.
When a human body moves, the frequency of the intermediate frequency signal generated after the echo wave is mixed with the electromagnetic wave is lower, so that after signals of 50Hz or above are removed, the anti-interference capability of the microwave inductor of the lighting equipment can be enhanced, and the probability of misoperation of the microwave inductor is reduced.
In one embodiment, the set range is that the frequency is in the interval of 1Hz-40 Hz.
In one embodiment, the sampling period of the intermediate frequency signal is 1 ms.
In one embodiment, the fast fourier transforming the plurality of sets of intermediate frequency signals within a set period comprises:
the fast fourier transform is performed on 256 sets of intermediate frequency signals within 256 ms.
In one embodiment, the method further includes, after collecting the echo of the electromagnetic wave, mixing the electromagnetic wave and the echo thereof, and generating an intermediate frequency signal:
and storing the intermediate frequency signal into a memory.
Further, the present invention also provides an illumination apparatus control device, including:
the microwave starting module is used for starting the microwave device and controlling the microwave device to emit electromagnetic waves with preset frequency;
the microwave receiving module is used for receiving the echo of the electromagnetic wave, mixing the electromagnetic wave and the echo thereof and then generating an intermediate frequency signal;
the fast Fourier transform module is used for carrying out fast Fourier transform on a plurality of groups of intermediate frequency signals in a set period to obtain the frequency spectrum energy of the plurality of groups of intermediate frequency signals in the set period;
the operation module is used for performing superposition operation on the spectrum energy according to the frequency in the spectrum energy to obtain the total energy of the spectrum in the set period;
and the judging module is used for driving the lighting equipment to start lighting if the total energy of the frequency spectrum is greater than a threshold value.
According to the lighting equipment control device, the intermediate frequency signals are subjected to fast Fourier transform, the converted spectrum energy is subjected to superposition operation, and when the total energy of the spectrum is larger than the threshold value, the lighting equipment is driven to start lighting, so that the anti-interference capability of the lighting equipment microwave inductor is improved and the probability of misoperation of the microwave inductor is reduced on the premise of not reducing the sensitivity.
In one embodiment, the operation module comprises:
the selection unit is used for selecting the spectrum energy in a set range, wherein the frequency of the set range is less than 50 Hz;
and the operation unit is used for performing superposition operation on the selected partial spectrum energy to acquire the total spectrum energy in the set period.
Further, the present invention also provides a computer-readable medium having stored thereon a computer program which, when executed by a processor, implements the lighting device control method in any one of the embodiments described above.
Further, the present invention also provides a lighting device, including a light emitting element, a memory, a processor, and a computer program stored in the memory and executable by the processor, wherein the processor executes the computer program to implement the lighting device control method in any one of the above embodiments.
For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic view of an application scenario of the lighting control method according to the present invention;
FIG. 2 is a flow diagram of a method of lighting in one embodiment;
FIG. 3 is a diagram illustrating the steps of a method for selecting spectral energy according to one embodiment;
FIG. 4 is a flow chart illustrating a method for controlling a lighting device according to an exemplary embodiment;
FIG. 5 is a schematic structural diagram of a control device of an embodiment of the lighting apparatus;
fig. 6 is a schematic view of the structure of the lighting device in one embodiment.
Detailed Description
The lighting device control method provided by the application can be applied to the application environment shown in fig. 1. The lighting fixture 110 can recognize the movement of the human body 120 within a certain distance range, thereby realizing automatic lighting on. The application environment can be the specific fields of corridor lighting control, door control and the like. The lighting device comprises a control module, which may be a device illuminating an area or volume, or a device or a series of devices illuminating an enclosed space, or a device for edge or back lighting (such as backlit advertising, signage, LCD displays), a light bulb replacement (e.g. replacing AC incandescent lamps, low voltage lamps, fluorescent lamps, etc.), etc. any other lighting device.
In one embodiment, as shown in fig. 2, there is provided a lighting device control method, which is applied to the lighting device 110 in fig. 1, and includes the following steps:
step S201: and starting the microwave device, and controlling the microwave device to emit electromagnetic waves with preset frequency.
The microwave device comprises a microwave oscillator and a microwave antenna, wherein the microwave oscillator is used for generating microwaves, namely, electromagnetic waves with preset frequency are generated and sent to the periphery of the lighting equipment through the microwave antenna, and in the embodiment, the electromagnetic waves are high-frequency electromagnetic waves with the preset frequency of 5.8 GHz. The electromagnetic waves emitted by the microwave antenna will be absorbed or reflected by the human body or object.
Specifically, in this step, the lighting device starts a microwave oscillator and a microwave antenna, generates a high-frequency electromagnetic wave with a preset frequency of 5.8GHz by the microblog oscillator, and transmits the high-frequency electromagnetic wave to the upper periphery by the microwave antenna.
Step S202: and receiving the echo of the electromagnetic wave, and mixing the electromagnetic wave and the echo thereof to generate an intermediate frequency signal.
The microwave antenna is also used for receiving the echo of the electromagnetic wave reflected by the human body or the object, and according to the Doppler principle, if the electromagnetic wave encounters the moving object or the human body, the frequency of the echo is deviated from the frequency of the transmitted electromagnetic wave, namely the frequency is different, so that after the echo and two paths of different signals of the electromagnetic wave are mixed, an intermediate frequency signal with lower frequency is generated, the frequency of the intermediate frequency signal comprises the speed information of the human body or the object, and the amplitude of the intermediate frequency signal comprises the distance information between the moving human body or the object and the lighting equipment. If the human body or the object is stationary, the frequency and the amplitude of the intermediate frequency signal are small.
Specifically, in this step, the lighting device collects the echo of the electromagnetic wave through the microwave antenna, and mixes the emitted electromagnetic wave with the echo to generate an intermediate frequency signal with a lower frequency.
Step S203: and carrying out fast Fourier transform on the multiple groups of intermediate frequency signals in the set period to obtain the frequency spectrum energy of the multiple groups of intermediate frequency signals in the set period.
The set period is a sampling period set by a user, in one sampling period, the lighting device can acquire multiple groups of echoes of electromagnetic waves according to sampling frequency and generate multiple groups of intermediate frequency signals, and the frequency spectrum energy is the frequency and amplitude of each sinusoidal signal forming the multiple groups of intermediate frequency signals.
Specifically, in this step, the lighting device performs Fast Fourier Transform (FFT) on a plurality of sets of intermediate frequency signals generated in a set period to obtain a frequency and an amplitude of each sinusoidal signal included in the plurality of sets of intermediate frequency signals.
Step S204: and performing superposition operation on the spectrum energy according to the frequency in the spectrum energy to obtain the total spectrum energy in the set period.
In practical applications, the echo may include a large amount of clutter interference of high frequency or low frequency, and since the human body moving speed is slow, the frequency of the intermediate frequency signal generated after mixing the electromagnetic wave and the echo thereof is low, so that a portion obviously belonging to clutter interference, for example, a portion with high frequency, may be removed according to the frequency in the spectral energy before performing the superposition operation on the spectral energy.
Specifically, in this step, the amplitude of the spectral energy is subjected to a superposition operation according to the frequency of the spectral energy to obtain the total spectral energy in the set period, where the superposition operation may be to calculate a peak value of the amplitude, or may be to calculate an effective value of the amplitude.
Step S205: and if the total energy of the frequency spectrum is larger than a threshold value, driving the lighting equipment to turn on lighting.
The threshold value is a lowest value preset by a user, if the total energy of the frequency spectrum is larger than the threshold value, the fact that the lighting lamp detects that a human body moves nearby is indicated, and the controller of the lighting lamp drives the lighting equipment to start lighting.
According to the lighting equipment control method, the intermediate frequency signals are subjected to fast Fourier transform, the converted spectrum energy is subjected to superposition operation, and when the total energy of the spectrum is larger than the threshold value, the lighting equipment is driven to start lighting, so that the anti-interference capability of the microwave inductor of the lighting equipment is improved and the probability of misoperation of the microwave inductor is reduced on the premise of not reducing the sensitivity.
In an embodiment, referring to fig. 3, in order to more accurately remove the noise in the intermediate frequency signal, step S204 performs a superposition operation on the spectrum energy according to the frequency in the spectrum energy to obtain the total energy of the spectrum in the set period, which specifically includes:
step S301: and selecting the spectrum energy within a set range, wherein the frequency within the set range is less than 50 Hz.
Step S302: and performing superposition operation on the selected partial frequency spectrum energy to obtain the total frequency spectrum energy in the set period.
The frequency of the set range is less than 50Hz, on one hand, the frequency is used for removing high-frequency noise waves, and on the other hand, interference signals generated by 50Hz of the commercial power can be removed.
In a more specific embodiment, the set range is a frequency range of 1-40Hz, depending on the data measured in the particular application.
In order to respond to the movement of the human body more accurately, in one embodiment, the period of collecting the intermediate frequency signals is 1ms, and fast fourier transform is performed on a plurality of groups of intermediate frequency signals within a set period, including: a fast fourier transform is performed on 256 groups of data of the intermediate frequency signal within 256 ms. I.e. the set period is 256ms, the number of intermediate frequency signals is 256 groups.
Referring to fig. 4, in one embodiment, the method for controlling a lighting apparatus includes the following steps:
s401: and starting the microwave device, and controlling the microwave device to emit electromagnetic waves with the frequency of 5.8 GHz.
S402: and receiving the echo of the electromagnetic wave, and mixing the electromagnetic wave and the echo thereof to generate an intermediate frequency signal.
S403: and after the intermediate frequency signal is subjected to low-pass amplification, AD sampling is performed every 1ms, and the sampled intermediate frequency signal data is stored in a memory.
S404: when the sampled and stored intermediate frequency signal data reach 256 groups, the 256 groups of intermediate frequency signal data are subjected to fast fourier transform, and the spectrum energy of the 256 groups of intermediate frequency signals is obtained.
S405: selecting the frequency spectrum energy with the frequency range of 1-40Hz from the frequency spectrum energy, and carrying out superposition operation on the selected frequency spectrum energy to obtain the total energy of the frequency spectrum.
S406: and judging whether the total energy of the frequency spectrum is larger than a threshold value, if so, driving the lighting equipment to start lighting.
According to the lighting equipment control method, the intermediate frequency signal is subjected to fast Fourier transform, the converted spectrum energy is subjected to superposition operation, low-frequency and high-frequency interference parts are removed before the spectrum energy is subjected to superposition operation, and when the total energy of the spectrum is larger than the threshold value, the lighting equipment is driven to start lighting, so that the anti-interference capability of the microwave inductor of the lighting equipment is improved and the probability of misoperation of the microwave inductor is reduced on the premise of not reducing the sensitivity.
In one embodiment, as shown in fig. 5, the present invention also provides a lighting device control apparatus 500, including:
a microwave starting module 501, configured to start a microwave device and control the microwave device to emit electromagnetic waves with a preset frequency;
a microwave receiving module 502, configured to receive an echo of the electromagnetic wave, mix the electromagnetic wave and the echo thereof, and generate an intermediate frequency signal;
a fast fourier transform module 503, configured to perform fast fourier transform on multiple sets of intermediate frequency signals in a set period, so as to obtain spectrum energy of the multiple sets of intermediate frequency signals in the set period;
the operation module 504 is configured to perform superposition operation on the spectrum energy according to the frequency in the spectrum energy, so as to obtain total spectrum energy in the set period;
and the judging module 505 is configured to drive the lighting device to turn on lighting if the total energy of the frequency spectrum is greater than a threshold value.
In one embodiment, the operation module 504 includes:
a selecting unit 5041, configured to select the spectrum energy within a set range, where the frequency of the set range is less than 50 Hz;
and the operation unit 5042 is configured to perform a superposition operation on the selected partial spectrum energy to obtain total spectrum energy in the set period.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
According to the lighting equipment control device, the intermediate frequency signal is subjected to fast Fourier transform, the converted spectrum energy is subjected to superposition operation, low-frequency and high-frequency interference parts are removed before the spectrum energy is subjected to superposition operation, and when the total energy of the spectrum is larger than the threshold value, the lighting equipment is driven to start lighting, so that the anti-interference capability of the microwave inductor of the lighting equipment is improved and the probability of misoperation of the microwave inductor is reduced on the premise of not reducing the sensitivity.
The present invention also provides a computer-readable medium having stored thereon a computer program which, when executed by a processor, implements a lighting device control method in any of the above embodiments.
Referring to fig. 6, in an embodiment, the lighting device 600 of the present invention includes a light emitting element 601, a memory 602, a processor 603, and a computer program stored in the memory 602 and executable by the processor 603, and when the processor 603 executes the computer program, the lighting device control method in any one of the above embodiments is implemented.
In this embodiment, the processor 603 may be 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. The memory 602 may take the form of a computer program product embodied on one or more storage media including, but not limited to, disk storage, CD-ROM, optical storage, and the like, in which program code is embodied. Computer readable storage media, which include both non-transitory and non-transitory, removable and non-removable media, may implement any method or technology for storage of information. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of the storage medium of the computer include, but are not limited to: phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technologies, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic tape storage or other magnetic storage devices, or any other non-transmission medium, may be used to store information that may be accessed by a computing device.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. A lighting device control method, characterized by comprising the steps of:
starting the microwave device, and controlling the microwave device to emit electromagnetic waves with preset frequency;
receiving the echo of the electromagnetic wave, and mixing the electromagnetic wave and the echo thereof to generate an intermediate frequency signal;
carrying out fast Fourier transform on a plurality of groups of intermediate frequency signals in a set period to obtain the frequency spectrum energy of the plurality of groups of intermediate frequency signals in the set period;
performing superposition operation on the spectrum energy according to the frequency in the spectrum energy to obtain the total spectrum energy in the set period;
and if the total energy of the frequency spectrum is larger than a threshold value, driving the lighting equipment to turn on lighting.
2. The lighting apparatus control method according to claim 1, wherein performing a superposition operation on the spectral energy according to a frequency in the spectral energy to obtain a total spectral energy in the set period comprises:
selecting the spectrum energy within a set range, wherein the frequency within the set range is less than 50 Hz;
and performing superposition operation on the selected partial frequency spectrum energy to obtain the total frequency spectrum energy in the set period.
3. The lighting device control method according to claim 2, characterized in that:
the set range is that the frequency is in the interval of 1Hz-40 Hz.
4. The lighting device control method according to claim 1, characterized in that:
the sampling period of the intermediate frequency signal is 1 ms.
5. The lighting device control method according to claim 4, wherein performing fast Fourier transform on a plurality of sets of intermediate frequency signals within a set period comprises:
the fast fourier transform is performed on 256 sets of intermediate frequency signals within 256 ms.
6. The lighting apparatus control method according to claim 1, wherein the method further comprises the steps of collecting an echo of the electromagnetic wave, mixing the electromagnetic wave and the echo thereof, and generating an intermediate frequency signal:
and storing the intermediate frequency signal into a memory.
7. A lighting device control apparatus, comprising:
the microwave starting module is used for starting the microwave device and controlling the microwave device to emit electromagnetic waves with preset frequency;
the microwave receiving module is used for receiving the echo of the electromagnetic wave, mixing the electromagnetic wave and the echo thereof and then generating an intermediate frequency signal;
the fast Fourier transform module is used for carrying out fast Fourier transform on a plurality of groups of intermediate frequency signals in a set period to obtain the frequency spectrum energy of the plurality of groups of intermediate frequency signals in the set period;
the operation module is used for performing superposition operation on the spectrum energy according to the frequency in the spectrum energy to obtain the total energy of the spectrum in the set period;
and the judging module is used for driving the lighting equipment to start lighting if the total energy of the frequency spectrum is greater than a threshold value.
8. The lighting device control apparatus according to claim 7, wherein the arithmetic module comprises:
the selection unit is used for selecting the spectrum energy in a set range, wherein the frequency of the set range is less than 50 Hz;
and the operation unit is used for performing superposition operation on the selected partial spectrum energy to acquire the total spectrum energy in the set period.
9. A computer-readable medium having a computer program stored thereon, characterized in that:
the computer program, when executed by a processor, implements the lighting device control method of any one of claims 1 to 6.
10. A lighting device comprising a light emitting element, a memory, a processor, and a computer program stored in the memory and executable by the processor, characterized in that:
the processor, when executing the computer program, implements the lighting device control method of any one of claims 1 to 6.
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