CN117750565A - Lighting control system, method and lighting system - Google Patents
Lighting control system, method and lighting system Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention relates to the technical field of illumination, and discloses an illumination control system, an illumination control method and an illumination system, wherein the illumination control system comprises a main controller, a communication module, a light source control module and a radar module which are arranged in illumination equipment; the radar module acquires personnel state information of an induction area of the lighting equipment in real time; the communication module broadcasts and sends personnel state information to other lighting equipment in the private network, and receives the personnel state information sent by the other lighting equipment; the main controller is used for judging whether the network addresses of other lighting equipment exist in the node position information mapping table, if so, calculating the time for a person to enter the sensing area, and combining the weighing coefficients to calculate the brightness of the lighting equipment so as to form a control waveform; and the light source control module controls the periodic conduction of the field effect transistor based on the control waveform. Not only the coordination work among different lighting devices is realized, but also the electrodeless dimming of the lighting devices is realized.
Description
Technical Field
The invention relates to the technical field of illumination, in particular to an illumination control system, an illumination control method and an illumination system.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In the existing public area illumination control system, the light source aspect is gradually replaced by an LED light source, but the control mode is not advanced enough.
Currently, lighting control systems have the following problems:
the isolation of the LED lamps can not be coordinated;
the LED light source has the electrodeless dimming condition, but the implementation mode is simpler;
more or less dependent on active participation by the person.
Disclosure of Invention
In order to solve the problems, the invention provides a lighting control system, a lighting control method and a lighting system, which realize coordination work among different lighting equipment through a private network, and realize electrodeless dimming of the lighting equipment through setting of a node position information mapping table and acquisition of personnel state information.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a first aspect of the present invention provides a lighting control system, which includes a main controller, a communication module, a light source control module, and a radar module disposed in a lighting device, wherein the communication module of the lighting device and the communication modules of other lighting devices are in communication with each other to form a private network;
the radar module is used for collecting personnel state information of an induction area entering the lighting equipment in real time;
the communication module is used for broadcasting and transmitting the personnel state information acquired by the radar module to other lighting equipment in the private network and receiving the personnel state information transmitted by the other lighting equipment;
the main controller is used for judging whether the network address of other lighting equipment exists in the node position information mapping table after the communication module receives the personnel state information sent by the other lighting equipment, if so, calculating the time of personnel entering the sensing area, and calculating the brightness of the lighting equipment by combining the weighting coefficient to form a control waveform;
the light source control module is used for controlling the periodic conduction of the field effect transistor based on the control waveform.
Further, the weighting coefficient is: ko=300×ln (n×step), where n represents an index of the network address of the other lighting device in the node position information map, and step represents a conversion coefficient of the distance of the lighting device from the other lighting device.
Further, the personnel status information includes a distance of the personnel from the lighting device, a movement speed of the personnel, and a movement direction.
Further, the node location information mapping table is that, after the communication module receives the short address allocated by the network manager, the communication module receives the network addresses of a plurality of other lighting devices closest to the lighting device, which are issued by the network manager.
Further, the network addresses in the node position information mapping table are ordered from the near to the far according to the distances between other lighting devices corresponding to the network addresses and the lighting devices.
Further, the distance is calculated based on the position information of other lighting equipment and lighting equipment; and if the network manager does not store the position information of the lighting equipment, sending a position scanning command to the lighting equipment.
Further, the communication module is further configured to send a network access application encrypted by using a network number to the network manager in a broadcast manner, so as to obtain a short address allocated by the network manager;
and after decrypting the encrypted network access application, the network manager checks the message of the network access application, and after checking correctly, allocates a short address to the communication module.
Further, the lighting device also comprises an illuminance sensing module arranged in the lighting device;
the illuminance sensing module is used for collecting the ambient illuminance of the installation position of the lighting equipment; and the main controller is also used for controlling the switch of the lighting equipment based on the ambient light illuminance.
A second aspect of the present invention provides a lighting control method based on the lighting control system of the first aspect, comprising the steps of:
the radar module acquires personnel state information of an induction area of the lighting equipment in real time;
the communication module broadcasts and sends personnel state information acquired by the radar module to other lighting equipment in the private network, and receives the personnel state information sent by the other lighting equipment;
after the communication module receives the personnel status information sent by some other lighting equipment, the main controller judges whether the network address of the other lighting equipment exists in the node position information mapping table, if so, the time for personnel to enter the sensing area is calculated, and the brightness of the lighting equipment is calculated by combining with the weighting coefficient to form a control waveform;
and the light source control module controls the periodic conduction of the field effect transistor based on the control waveform.
A second aspect of the invention provides a lighting system comprising a number of lighting devices, each lighting device employing a lighting control system as described in the first aspect.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a lighting control system, which realizes coordination work among different lighting equipment through a private network, and realizes electrodeless dimming of the lighting equipment through setting of a node position information mapping table and acquisition of personnel state information.
The invention provides a lighting control system, which automatically adjusts brightness according to personnel status information sent by a node position information mapping table and other lighting equipment in a certain range, and integrally shows that the closer the personnel is to a lamp, the higher the brightness is, the farther the distance is, the lower the brightness is, the brightness of the lamp can present a continuous change process, and the lamp can not suddenly light up or suddenly light out, so that uncomfortable feeling can be given.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
Fig. 1 is a block diagram of a lighting control system according to a first embodiment of the present invention;
fig. 2 is a control schematic diagram of 3 lamps according to a first embodiment of the invention.
Detailed Description
The invention will be further described with reference to the drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The embodiments of the present invention and features of the embodiments may be combined with each other without conflict, and the present invention will be further described with reference to the drawings and embodiments.
Example 1
It is an object of a first embodiment to provide a lighting control system.
The lighting control system provided by the embodiment is applied to public lighting equipment.
In this embodiment, the common lighting device is an LED (light emitting diode) lamp.
The lighting control system provided in this embodiment, as shown in fig. 1, includes a main controller, a power supply, a light source control module, a communication module, a radar module, and an illuminance sensing module, which are disposed in a lighting device. The communication modules of the lighting equipment and the communication modules of other lighting equipment are communicated with each other to form a private network.
The power supply is a stable low-voltage power supply for the whole main controller, the light source control module, the communication module, the radar module and the illuminance sensing module, and conversion from commercial power AC220 to DC12V and DC3.3V is realized.
The radar module is used for acquiring personnel state information of an induction area entering the lighting equipment in real time by adopting a FWC (frequency modulated continuous wave) radar. The main controller reads personnel state information acquired by the radar module in real time through a UART interface (asynchronous serial communication port). The personnel state information comprises the movement speed and movement direction of personnel and the distance between the personnel and the lamp, so that personnel position monitoring is realized.
The illuminance sensing module is an illuminance sensor and is used for collecting the ambient illuminance of the installation position of the lighting equipment in real time. The main controller reads the illuminance value acquired by the illuminance sensing module in real time through the I2C interface to acquire the ambient illuminance of the lamp installation position.
The communication module adopts 2.4G wireless communication and is used for broadcasting and sending personnel state information acquired by the radar module to other lighting equipment in the private network and receiving the personnel state information sent by the other lighting equipment. And the PHY of BLE5.0 is integrated in the main controller, and the BLE-mesh protocol is realized through software, so that the mutual communication among the lighting devices is realized.
After receiving personnel status information sent by some other lighting equipment, the main controller judges whether the other lighting equipment exists in the node position information mapping table, if so, the time for personnel to enter the sensing area is calculated, the weighing coefficient is combined, the brightness lux of the lighting equipment is calculated, and PWM (pulse width modulation) is obtained based on the brightness lux.
The light source control module controls the period conduction of the MOS tube (field effect tube) through PWM (pulse width modulation) control waveforms (duty ratio of PWM) output by the main controller, so as to realize the on-off control of lighting equipment (LED lamp beads) and realize LED electrodeless dimming.
For a certain lighting device, the FMCW radar installed in the lighting device can monitor personnel status information in an induction range in real time; after the person monitored by the radar module of the lighting device moves, the collected person state information is broadcast and sent to nodes (lighting devices) in the private network, as shown in table 1.
Table 1, broadcast transmission format of personnel status information
Where byte represents bytes and Short-Addr represents a Short address.
If other nodes (lighting devices) in the private network receive the personnel status information, firstly searching whether the node (the lighting device for broadcasting the personnel status information) is in a node position information mapping table of the node, if the node exists in the node position information mapping table, calculating the distance between the personnel status information source node (the lighting device for broadcasting the personnel status information) and the node (the lighting device for receiving the personnel status information) according to the node position information mapping table, and then setting the lighting intensity of the lighting according to the calculated distance. Thus, after one of the lighting fixtures determines to be on, the following 5-10 fixtures automatically gradually turn on and off according to the position information defined in the node position information mapping table, and are adjusted to proper brightness.
Taking 3 lamps (lighting devices) as shown in fig. 2 as an example, the following description will be given:
(1) The current personnel just enter the induction area of the lamp 1, the lamp 1 obtains personnel status information, and the personnel status information is sent to the lamps 2 and 3 in the private network.
(2) For the lamp 2 or 3, after receiving the personnel status information sent by the lamp 1, searching the network address of the lamp 1 in a two-dimensional coordinate information table (node position information mapping table) of the lamp 1, if the network address of the lamp 1 exists in the node position information mapping table, acquiring the position information of the lamp 1, calculating the distance between the lamp 1 and the lamp 1, and judging whether the personnel is approaching or separating by combining the personnel status information.
(3) If the person is approaching, the time t for entering the sensing area is calculated based on the person status information and the distance from the lamp 1 (i.e., the distance between the two lamps stored in the position information map), and the weighting coefficient Ko is calculated.
A parameter is stored in the node location information map of the node (luminaire 2 or 3) as a spacing step, which value can represent a conversion coefficient of the distance between every two nodes, from which conversion coefficient the value of Ko can be calculated, ko=300×ln (n×step), ln being a natural logarithm, n representing the index interval of the two nodes in the location information map, i.e. the index of the network address of luminaire 1 in the location information map, and the Ko coefficient being signed, indicating whether to increase or decrease the brightness.
(4) After receiving the personnel status information of the lamp 1, the lamp 2 or the lamp 3 judges that the personnel is close to the lamp 2 or the lamp 3 according to the movement direction, and adjusts the brightness value lux of the lamp 2 or the lamp 3, lux=lset+ko/t, wherein Lset is a set value.
(5) When a person leaves the luminaire 1 and enters the range of the luminaire 2, the luminaire 1 loses the person status information of its own sensor, reducing the brightness of the luminaire 1 to a set value Lset, for example 200lux. The lamp 2 obtains personnel status information and sends the personnel status information to the lamp 1 and the lamp 3; after the lamp 1 acquires the personnel status information sent by the lamp 2, judging that personnel are far away from the lamp 1 according to the movement direction, and calculating the illuminance value lux of the lamp 1, wherein lux=lset-Ko/t; after receiving the personnel status information of the lamp 2, the lamp 3 determines that the personnel is approaching the lamp 3 according to the movement direction, and the lamp 3 performs brightness adjustment according to lux=lset+ko/t.
In summary, the luminance of the lighting device is automatically adjusted within a certain range according to the personnel status information by the two-dimensional coordinate information table in the lighting device and the personnel status information sent by the lighting device, and the luminance is lower as the personnel is closer to the lighting device and the distance is farther.
The brightness of the lighting device can be continuously changed, and the lighting device can not suddenly light up or suddenly extinguish, so that uncomfortable feeling is given.
The controller combines illuminance control, so that the light source is turned off to save energy under the condition that the light rays of the lighting device are satisfied. And controlling the intensity change of the ambient light under different scenes.
In this embodiment, a ble-mesh protocol stack is implemented through software, so that the system has a ble-mesh networking capability.
Each control area is provided with 1 lamp (management node) with a network manager function and is responsible for the establishment of the whole network. Each network manager has its own specific app_id (software number) and net_id (network number), and only relay nodes and normal nodes having the same app_id and net_id as the network manager can join the private network of the network manager.
Each control area is provided with a plurality of lamps (relay nodes) with a network relay function, the lamps are used as the relay nodes and are responsible for expanding the coverage range of a private network of a network manager, and when the nodes receive message data of a common node of the network, the nodes can repackage a data packet header and forward the data to the network manager. The specific installation number of the relay nodes is set according to actual conditions.
Besides the functions of a network manager and a network relay, other lamps are used as common nodes, only the network communication function is realized, and network maintenance is not carried out.
After all the relay and common node lamps are powered on, the communication module sends a network access application to the network manager in a broadcast mode, and the network access application message is encrypted by using the NET_ID as a key to obtain a ciphertext (encrypted network access application), as shown in Table 2.
TABLE 2 format of network entry request message
If the NET_ID of the node and the NET_ID of the network manager are inconsistent, the network access application message cannot be decrypted, and thus the subsequent network access process cannot be completed.
Only when the NET_ID of the node and the NET_ID of the network manager are consistent, the ciphertext is correctly decrypted, the data verification of the network access application message is completely correct, the network manager distributes a network short address to the node, and the subsequent node and the communication of the network manager all use the short address for communication.
After receiving the address application instruction (network access application), the network manager allocates a fixed network short address unique in the network according to the MAC address of the node.
In this embodiment, all data except the mac layer is encrypted using the app_id as a key at the time of transmission.
After the network manager allocates a short address to each node, the node still does not enter a working state, and the node cannot determine the confirmed position information of the node in the private network, so that the network manager needs to be interacted with to confirm the position relationship, as shown in table 3, two possibilities exist in the process:
TABLE 3 interactive confirmation of positional relationship
(1) The explicit location information of the node has been saved in the network manager or has been manually modified without the need to determine the location information. In this case, the network manager directly transmits the confirmed location information to the node after network access.
Note that: the pitch step represents the degree of the spacing density of each two devices for subsequent brightness control.
After the nodes access the network, the network manager will issue 5-10 network addresses (i.e. short addresses) of other lamp nodes (the numerical value is automatically calculated according to the node position information, or can be manually corrected according to the actual installation information) to the network lamp nodes, and the lamp nodes and the network lamp nodes are in a relationship of increasing distance from near to far to form a node position information mapping table containing position information, and the address list is used as a basis for adjusting the brightness of the lamp in the later period.
(2) The network manager does not store the position information of a certain node, and needs to send a position scanning command to the node first, and after the node receives the position scanning command, the node sends the addresses and signal strengths of other nearby nodes (the signal strengths of the node and the nearby nodes) monitored by the node to the network manager, and the network manager inquires and calculates the position information of the current node according to the short address and the strength information.
And (3) ordering the positions of the network manager and the relay nodes from strong to weak according to the signal strength of each node relative to the network manager and the relay nodes by taking the positions of the network manager and the relay nodes as references, and determining the position information of each node by taking the position information as a calculation basis of the distance. Typically, this location information requires manual confirmation to ensure control accuracy. When the network manager does not determine the specific position of the node, the position of the node needs to be determined through signal intensity values, for example, 5 nodes are distributed around the relay node, 10 nodes are distributed around the relay node, after the relay node needs to search for 10 nodes, the signal intensity of the 10 nodes is analyzed, the closer the distance between the signal intensity and the relay node is, the further the distance is in turn, the signal intensity is weakened, and accordingly the searched 10 nodes are placed in the position information mapping table.
Example two
An object of the second embodiment is to provide a lighting control method based on the lighting control system of the first embodiment, including the following steps:
the radar module acquires personnel state information of an induction area of the lighting equipment in real time;
the communication module broadcasts and sends personnel state information acquired by the radar module to other lighting equipment in the private network, and receives the personnel state information sent by the other lighting equipment;
after the communication module receives the personnel status information sent by some other lighting equipment, the main controller judges whether the network address of the other lighting equipment exists in the node position information mapping table, if so, the time for personnel to enter the sensing area is calculated, and the brightness of the lighting equipment is calculated by combining with the weighting coefficient to form a control waveform;
and the light source control module controls the periodic conduction of the field effect transistor based on the control waveform.
Example III
It is an object of a third embodiment to provide a lighting system comprising a number of lighting devices, each lighting device employing a lighting control system as described in embodiment one.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (10)
1. A lighting control system comprises a main controller, a communication module, a light source control module and a radar module which are arranged in lighting equipment, wherein the communication module of the lighting equipment and the communication modules of other lighting equipment are communicated with each other to form a private network;
the radar module is used for collecting personnel state information of an induction area entering the lighting equipment in real time;
the communication module is used for broadcasting and transmitting the personnel state information acquired by the radar module to other lighting equipment in the private network and receiving the personnel state information transmitted by the other lighting equipment;
the main controller is used for judging whether the network address of other lighting equipment exists in the node position information mapping table after the communication module receives the personnel state information sent by the other lighting equipment, if so, calculating the time of personnel entering the sensing area, and calculating the brightness of the lighting equipment by combining the weighting coefficient to form a control waveform;
the light source control module is used for controlling the periodic conduction of the field effect transistor based on the control waveform.
2. A lighting control system as set forth in claim 1, wherein: the weighting coefficients are: ko=300×ln (n×step), where n represents an index of the network address of the other lighting device in the node position information map, and step represents a conversion coefficient of the distance of the lighting device from the other lighting device.
3. A lighting control system as set forth in claim 1, wherein: the personnel status information comprises the distance of the personnel from the lighting device, the movement speed and the movement direction of the personnel.
4. A lighting control system as set forth in claim 1, wherein: the node position information mapping table is that after the communication module receives the short address distributed by the network manager, the communication module receives the network addresses of a plurality of other lighting devices closest to the lighting device, which are issued by the network manager.
5. A lighting control system as set forth in claim 4, wherein: and the network addresses in the node position information mapping table are sequenced from the near to the far according to the distances between other lighting devices corresponding to the network addresses and the lighting devices.
6. A lighting control system as set forth in claim 5, wherein: the distance is calculated based on the position information of other lighting equipment and lighting equipment; and if the network manager does not store the position information of the lighting equipment, sending a position scanning command to the lighting equipment.
7. A lighting control system as set forth in claim 1, wherein: the communication module is also used for sending a network access application encrypted by a network number to the network manager in a broadcast mode so as to acquire a short address distributed by the network manager;
and after decrypting the encrypted network access application, the network manager checks the message of the network access application, and after checking correctly, allocates a short address to the communication module.
8. A lighting control system as set forth in claim 1, wherein: the illumination sensing module is arranged in the lighting equipment;
the illuminance sensing module is used for collecting the ambient illuminance of the installation position of the lighting equipment; and the main controller is also used for controlling the switch of the lighting equipment based on the ambient light illuminance.
9. A lighting control method based on the lighting control system of any one of claims 1-8, characterized by: the method comprises the following steps:
the radar module acquires personnel state information of an induction area of the lighting equipment in real time;
the communication module broadcasts and sends personnel state information acquired by the radar module to other lighting equipment in the private network, and receives the personnel state information sent by the other lighting equipment;
after the communication module receives the personnel status information sent by some other lighting equipment, the main controller judges whether the network address of the other lighting equipment exists in the node position information mapping table, if so, the time for personnel to enter the sensing area is calculated, and the brightness of the lighting equipment is calculated by combining with the weighting coefficient to form a control waveform;
and the light source control module controls the periodic conduction of the field effect transistor based on the control waveform.
10. A lighting system, characterized by: comprising a number of lighting devices, each lighting device employing a lighting control system as claimed in any one of claims 1-8.
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