Multi-channel time slot jump type communication system and method and street lamp control system

Abstract

The invention discloses a multi-channel time slot jumping type communication system and method and a street lamp control system, and belongs to the technical field of street lamp intelligent control. Comprising a radar sensor, a data processing module, a communication module and a controller, wherein the data processing module and the communication module are arranged in the radar sensor; the radar sensor is used for collecting state information of people and vehicles entering a lighting area of the street lamp equipment in real time and transmitting the state information to the corresponding data processing module, and the data processing module is used for obtaining a token and generating a data packet according to the state information of people and vehicles; the communication module is used for broadcasting and sending the data packets to the controllers in all street lamp equipment; the controller is used for controlling the operation state of the corresponding street lamp equipment according to the data packet and a preset street lamp number; the token acquisition mode comprises a token mode and a time slot mode, and the priority of the token mode is greater than that of the time slot mode. Street lamp control can be carried out in real time according to human and vehicle states, communication time delay is reduced, and the problems of failure and time delay in existing data transmission are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent street lamp control, and in particular to a multi-channel time slot hopping communication system, method and street lamp control system. Background Art

[0002] The statements in this section merely mention background art related to the present invention and do not necessarily constitute prior art.

[0003] The street light intelligent control system is a system that uses modern information technology, such as the Internet of Things (IoT), sensor technology, cloud computing and big data analysis, to intelligently manage urban street lights. In the street light intelligent control system, the street light control will automatically adjust the street light brightness according to the situation of people or vehicles to meet the needs of on-site control.

[0004] Radar sensors are an important part of the intelligent control system of street lights. They are used to collect status information of people and vehicles within the sensing range and transmit it to the street light control system. However, during the communication process of data transmission, transmission failures and communication delays may occur, affecting the timeliness of street light control.

[0005] In the existing street light control system, wireless transmission is used to solve the timeliness problem of street light control. However, the street light coverage distance is long and requires a larger transmission power. At the same time, increasing the transmission power will cause channel interference between non-related street lights, resulting in an increased probability of data conflict, which greatly reduces the success rate of communication.

[0006] If a cloud platform architecture is used for street light control, the timeliness of control will be affected, and the dependence on the network will increase significantly, which may easily cause communication failures. Summary of the invention

[0007] In order to address the deficiencies of the prior art, the present invention provides a multi-channel time-slot hopping communication system, method and street light control system to establish a localized communication control network and improve data transmission efficiency, stability and response speed of street light control.

[0008] In a first aspect, the present invention provides a multi-channel time slot hopping communication system;

[0009] A multi-channel time slot hopping communication system includes a radar sensor, a data processing module and a communication module arranged inside the radar sensor, and a controller arranged in a street lamp device;

[0010] The radar sensor is used to collect status information of people and vehicles entering the lighting area of ​​the street lamp device in real time and transmit it to the corresponding data processing module, the data processing module is used to obtain a token and generate a data packet according to the status information of people and vehicles; the communication module is used to broadcast the data packet to the controllers in all the street lamp devices;

[0011] The controller is used to control the operating state of the corresponding street lamp device according to the data packet and the preset street lamp number;

[0012] The token acquisition method includes a token mode and a time slot mode, and the priority of the token mode is greater than the priority of the time slot mode.

[0013] In some implementations, generating a data packet according to the status information of the person and the vehicle is specifically:

[0014] If the human-vehicle status information is not empty, a control information packet is generated according to the human-vehicle status information; if the human-vehicle status information is empty, an empty information packet is generated.

[0015] In some implementations, the control information packet includes the local number, the new token number, the street lamp number, the control mode and verification information, and the empty information packet includes the local number, the new token number and verification information.

[0016] In some implementations, obtaining a token specifically includes:

[0017] Collect token information through the communication module;

[0018] If the token information is collected within the preset token waiting time, it is determined whether the token information and the local number match; if yes, the token is obtained; if not, the time slot interval is calculated according to the token information and the local number, and the token information is automatically obtained if the token information is not received when the time slot interval arrives;

[0019] If the token information is not collected within the preset token waiting time, the delay time is calculated, and the token is obtained by default when the delay time is reached.

[0020] In some embodiments, the delay time is expressed as:

[0021] T d =T loop +(N max -N me )*T slot ;

[0022] Among them, T loop N is the minimum sensor number. max is the maximum number of sensors, N me is the local number, T slotThe time slot.

[0023] In some implementations, the communication module is further configured to broadcast the token to communication modules of other radar sensors according to a preset token transfer path.

[0024] In some implementations, the token passing path is sequentially passed or skipped according to preset sensor numbers.

[0025] In some embodiments, the controller includes multiple parallel and independent channels, and if any channel does not receive a token within a preset channel switching time, it switches to a new channel.

[0026] In a second aspect, the present invention provides a multi-channel time slot hopping communication method;

[0027] A multi-channel time slot hopping communication method, based on the multi-channel time slot hopping communication system, comprises the following steps:

[0028] The radar sensor collects the status information of people and vehicles entering the lighting area of ​​the street lamp equipment in real time and transmits it to the corresponding data processing module;

[0029] The data processing module obtains the token and generates a data packet based on the status information of the person and vehicle; the communication module is used to broadcast the data packet to the controllers in all street lamp devices;

[0030] The controller controls the operating state of the corresponding street light device according to the data packet and the preset street light number;

[0031] The token acquisition method includes a token mode and a time slot mode, and the priority of the token mode is greater than the priority of the time slot mode.

[0032] In a third aspect, the present invention provides a street light control system;

[0033] A street lamp control system comprises a plurality of street lamp devices and the above-mentioned multi-channel time slot hopping communication system.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The technical solution provided by the present invention is that when a person or a vehicle enters the sensing range of the radar sensor, the radar sensor collects the status information of the person or the vehicle and sends it to the controller to realize the real-time adjustment of the operating status of the street lamp; at the same time, the communication modules of the radar sensors at different positions are used to form a private network to realize the coordination between different radar sensors and controllers, thereby improving the success rate of communication.

[0036] 2. In the technical solution provided by the present invention, the radar sensor adopts a single-channel design, and uses time slots and channel switching to jump to send data to ensure the timely transmission of data packets; the street lamp equipment adopts a multi-channel parallel design inside, which can simultaneously receive wireless data from multiple channels to ensure the reception of control data; at the same time, data conflicts are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0038] Figure 1 A schematic diagram of a system architecture provided by an embodiment of the present invention;

[0039] Figure 2 A schematic diagram of time slot allocation provided by an embodiment of the present invention;

[0040] Figure 3 A schematic diagram of sequential transfer of a token transfer path provided by an embodiment of the present invention;

[0041] Figure 4 A schematic diagram of a hopping mode transfer of a token transfer path provided by an embodiment of the present invention;

[0042] Figure 5 A schematic diagram of a token transfer path between multiple radar sensors provided by an embodiment of the present invention;

[0043] Figure 6 A schematic diagram of a token transfer path between multiple radar sensors provided by an embodiment of the present invention;

[0044] Figure 7 A schematic diagram of road lighting control provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0046] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0047] Embodiment 1

[0048] Next, combine Figure 1-Figure 7 , a multi-channel time slot hopping communication system disclosed in this embodiment is described in detail.

[0049] The multi-channel time-slot hopping communication system includes multiple radar sensors, a data processing module and a communication module installed inside the radar sensor, and a controller installed in the street lamp equipment. The communication module of the radar sensor communicates with the communication modules of other radar sensors and the controllers of all street lamp equipment to form a private network.

[0050] Radar sensors and street light equipment (including street lights and controllers for controlling the on and off of street lights) are installed in a discrete manner. Multiple radar sensors are installed on corresponding street light equipment. The number of radar sensors and the spacing between adjacent sensors are flexibly set according to the coverage area of ​​the radar sensors and the distribution of street lights. Under normal circumstances, multiple street light equipment can share the information collected by one radar sensor. In the worst case, each street light equipment needs to be installed with a radar sensor. In addition, radar sensors and street light equipment are uniformly coded.

[0051] In this embodiment, the radar sensor adopts a single-channel design, that is, it can only send and receive data on one channel at a time. After the current channel is sent, it can switch to other channels to send again; data is sent in a jumping manner using time slots and channel switching; in order to enable the street lamp equipment to receive wireless data from multiple channels at the same time, the controller inside the street lamp equipment adopts a multi-channel parallel design, which can receive wireless data from multiple channels at the same time.

[0052] Furthermore, in some embodiments, in order to facilitate actual deployment, even-number coding may be used for radar sensors and odd-number coding may be used for street lamp equipment.

[0053] As an implementation method, the radar sensor and the communication module are respectively connected to the data processing module for communication. The radar sensor is used to collect real-time status information of people and vehicles entering the lighting area of ​​the street lamp equipment and within its sensing range and transmit it to the data processing module installed inside. The data processing module is used to generate data packets based on the status information of people and vehicles. At the same time, the communication module is used to collect tokens; the radar sensor holding the token broadcasts the data packet to the controllers in all street lamp equipment through the communication module; the controller controls the operating status of the street lamp equipment according to the data packet.

[0054] Among them, the data packet is a control information packet or an empty information packet. If a person or a car passes within the sensing range of the radar sensor, the person or car status information is non-empty, including the movement speed, movement direction, and the distance between the person or car and the street lamp equipment; the data processing module generates a control information packet based on the person and car status information. The control information packet contains token data and control data, specifically: local number, new token number, street lamp number, control mode and verification information. Here, the local number refers to the radar sensor number; the new token number refers to the number of the next radar sensor (not necessarily the adjacent radar sensor). The device with this number has the data sending authority, and other devices passively receive; the street lamp number refers to the number of the street lamp where the radar sensor is installed.

[0055] If no person or vehicle passes within the sensing range of the radar sensor, the person and vehicle status information is empty, and an empty information packet is generated. The empty information packet contains the local number, new token number and verification information.

[0056] Each radar sensor collects tokens through the communication module. If no token is collected within a cycle time (preset token waiting time), the data processing module calculates the delay time based on the minimum and maximum numbers of all radar sensors and the local number. After waiting for the delay time, the token is obtained by default. The delay time is expressed as follows:

[0057] T d =T loop +(N max -N me )*T slot ;

[0058] Among them, T loop N is the minimum sensor number. max is the maximum number of sensors, N me is the local number, T slot The time slot.

[0059] Here, if Figure 2 As shown, the time slot time is a preset parameter, which is determined according to the maximum response time and the number of radar sensors. Each time slot time includes data processing time, sending waiting time, data sending time and retry time. According to this rule, at the beginning of the network, the radar sensor with the smallest number will automatically obtain the token first.

[0060] Within a cycle time, if a token is received, determine whether the token number matches the local number. If so, obtain the token. If not, calculate the time slot interval based on the token number and the local number. If the token is still not received when the interval time arrives, automatically obtain the token, that is, obtain the token by default.

[0061] The radar sensor holding the token sends the generated control information packet or empty information packet to the controllers of all street lamp devices through the communication module; after the sending is completed, the token will automatically pass the specified number to the sensor based on the preset token transfer path.

[0062] At the same time, the radar sensor that held the token last time will also receive the message to confirm that the token was successfully transferred. If the token is not successfully transferred within a time slot, the next token number will be changed to continue sending. If it is still not successfully transferred, no more data will be sent.

[0063] As an implementation method, combined with Figure 3-Figure 4 ,The token transfer path includes sequential transfer and skip mode. Sequential transfer means sequential transfer according to the numbering order of radar sensors; skip mode means skipping adjacent radar sensors and transferring to the next radar sensor with data sending authority. Compared with sequential transfer, skip mode reduces the number of data transmissions, and can optimize the number of transmissions according to actual needs, optimize the physical distance between two token transfers, and reduce the failure rate of transfer. At the same time, the correlation between nodes is used to reduce the impact of actual control caused by communication delay.

[0064] At the same time, the calculation method of the delay time and the time slot interval also needs to be adaptively modified according to the number of jumps.

[0065] As an implementation method, combined with Figure 5-Figure 6 When there are many radar sensors, the cycle time will be longer. For example, if the time slot is set to 0.1S and the real-time response time of each radar sensor is 1s, the current maximum capacity will be limited to 10 radar sensors, but in reality 20 radar sensors may need to be deployed. The current setting cannot meet the requirements, and additional channels need to be added to meet the requirements.

[0066] A channel switching time is set, for example, to 5 time slots.

[0067] When the device loses the token, it starts switching channels for receiving after 4 time slots to receive new tokens. The token holder starts transferring tokens after 5 time slots.

[0068] The controller receives a control information packet or an empty information packet. If it is an empty information packet, no processing is performed. If it is a control information packet, the controller determines whether the street lamp device is included in the coding range in the control mode according to the street lamp coding. If so, control is performed according to the control mode.

[0069] Figure 7In the figure, the circles represent streetlights on both sides of the road, the boxes represent vehicles or people on the road, and the arrows represent the direction of travel. Take the following vehicle as an example. The vehicle is set to travel at the maximum allowed speed. When it moves from streetlight No. 1 to streetlight No. 2, it takes 1S, the communication time slot is 50ms, and 1 channel can accommodate 20 streetlights. The distance between streetlights is 25 meters, which is greater than 500 meters. It is required that the 4 lights in front of the vehicle need to be lit in advance.

[0070] When street light No. 0003 detects a vehicle, it sends a control information packet: local number 0003, new token number, street light number 0007, control mode 1 or 2, and verification information.

[0071] Among them, control mode 1 means that when the street light number is ≥ the local number 0003 and ≤ the street light number 0007, the street light is on; when the street light number is < (local code - 1), the street light is off; control mode 2 means that when the street light number is ≥ the local number 0003 and ≤ the street light number 0007, the street light is on; when the street light number is < (local code - 2), the street light is off.

[0072] Here, the street light number is calculated based on the set distance and street light interval, for example: street light number = current number + (set distance / street light interval).

[0073] For example, when the vehicle is within the sensing range of radar sensor 0003, the street light number is 0007, and control mode 1 means: the street lights coded 0003, 0004, 0005, 0006, and 0007 are turned on, and the street light 0001 is turned off. The street light 0002 maintains the current state without change.

[0074] When the vehicle is within the sensing range of sensor 0005, the street light number is 0009, and the control mode is 1, which means: the street lights coded 0005, 0006, 0007, 0008, and 0009 are turned on, and the street lights 0001, 0002, and 0003 are turned off. Street light 0004 maintains its current state without any change.

[0075] Embodiment 2

[0076] Based on the multi-channel time slot hopping communication system described in Embodiment 1, this embodiment discloses a multi-channel time slot hopping communication method, including the following steps:

[0077] (1) The radar sensor collects real-time status information of people and vehicles entering the lighting area of ​​the street lamp equipment and transmits it to the corresponding data processing module.

[0078] (2) The data processing module obtains the token and generates a data packet based on the status information of the person and vehicle; the communication module is used to broadcast the data packet to the controllers in all street lamp devices.

[0079] (3) The controller controls the operating status of the corresponding street light device according to the data packet and the preset street light number.

[0080] In this embodiment, the token acquisition method includes a token mode and a time slot mode, and the priority of the token mode is higher than the priority of the time slot mode.

[0081] Embodiment 3

[0082] Embodiment 3 of the present invention provides a street lamp control system, including a plurality of street lamp devices and the multi-channel time slot hopping communication system described in Embodiment 1.

[0083] The description of each embodiment in the above embodiments has different emphases. For parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-channel time slot hopping communication system, characterized in that: It includes a radar sensor, a data processing module and a communication module arranged inside the radar sensor, and a controller arranged inside the street lamp device; The radar sensor is used to collect status information of people and vehicles entering the lighting area of ​​the street lamp device in real time and transmit it to the corresponding data processing module, and the data processing module is used to obtain a token and generate a data packet according to the status information of people and vehicles; The communication module is used to broadcast the data packet to the controllers in all the street lamp devices; The controller is used to control the operating state of the corresponding street lamp device according to the data packet and the preset street lamp number; The token acquisition method includes a token mode and a time slot mode, and the priority of the token mode is greater than the priority of the time slot mode.

2. The multi-channel time slot hopping communication system as claimed in claim 1, characterized in that: The data packet is generated according to the status information of the person and the vehicle as follows: If the human-vehicle status information is not empty, a control information packet is generated according to the human-vehicle status information; if the human-vehicle status information is empty, an empty information packet is generated.

3. The multi-channel time slot hopping communication system as claimed in claim 2, characterized in that: The control information packet includes the local number, the new token number, the street lamp number, the control mode and the verification information, and the empty information packet includes the local number, the new token number and the verification information.

4. The multi-channel time slot hopping communication system as claimed in claim 1, characterized in that: The obtaining of the token specifically includes: Collect token information through the communication module; If the token information is collected within the preset token waiting time, it is determined whether the token information and the local number match; if yes, the token is obtained; if not, the time slot interval is calculated according to the token information and the local number, and the token information is automatically obtained if the token information is not received when the time slot interval arrives; If the token information is not collected within the preset token waiting time, the delay time is calculated, and the token is obtained by default when the delay time is reached.

5. The multi-channel time slot hopping communication system as claimed in claim 4, characterized in that: The delay time is expressed as: T d =T loop +(N max -N me )*T slot ; Among them, T loop N is the minimum number of sensors. max is the maximum number of sensors, N me is the local number, T slot The time slot.

6. The multi-channel time slot hopping communication system as claimed in claim 1, characterized in that: The communication module is also used to send the token broadcast to the communication modules of other radar sensors according to a preset token transfer path.

7. The multi-channel time slot hopping communication system as claimed in claim 6, characterized in that: The token transfer path is sequential transfer or jump transfer according to the preset sensor number.

8. The multi-channel time slot hopping communication system as claimed in claim 1, characterized in that: The controller includes a plurality of parallel and independent channels. If any channel does not receive a token within a preset channel switching time, it switches to a new channel.

9. A multi-channel time slot hopping communication method, based on the multi-channel time slot hopping communication system according to any one of claims 1 to 8, characterized in that: The steps include: The radar sensor collects the status information of people and vehicles entering the lighting area of ​​the street lamp equipment in real time and transmits it to the corresponding data processing module; The data processing module obtains the token and generates a data packet based on the status information of the person and the vehicle; The communication module is used to broadcast the data packet to the controllers in all street light devices; The controller controls the operating state of the corresponding street light device according to the data packet and the preset street light number; The token acquisition method includes a token mode and a time slot mode, and the priority of the token mode is greater than the priority of the time slot mode.

10. A street light control system, characterized in that: It comprises a plurality of street lamp devices and the multi-channel time slot hopping communication system as described in any one of claims 1-8.

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