CN218976875U

CN218976875U - LED synchronous controller based on Beidou satellite system

Info

Publication number: CN218976875U
Application number: CN202223190057.1U
Authority: CN
Inventors: 李涛; 熊波; 赵崇崇; 张旭
Original assignee: Zhengzhou Langwei Electronics Technology Co ltd
Current assignee: Zhengzhou Langwei Electronics Technology Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-05-05
Anticipated expiration: 2032-11-30

Abstract

The application discloses LED synchronous controller based on big dipper satellite system guarantees the time synchronization between each host computer through big dipper satellite system's time service, and each host computer coordinates the broadcast opportunity of self according to this time data, solves the problem that control effect that current each host computer caused when adopting synchronous network line to synchronize is asynchronous even unable synchronous. The power supply system comprises a main control unit, a Beidou satellite unit and a synchronous signal transmission unit which are correspondingly and respectively in communication connection with the main control unit, and a power supply module for supplying power with different voltage levels; the synchronous signal transmission unit comprises a data buffer which is correspondingly in communication connection with the main control unit communication unit and an output port which is correspondingly in communication connection with a corresponding data output port of the data buffer. The method has the advantages of high synchronization accuracy, strong interface applicability and the like.

Description

LED synchronous controller based on Beidou satellite system

Technical Field

The application relates to the technical field of LED control, in particular to an LED synchronous controller based on a Beidou satellite system.

Background

The LED lamp is widely used for illumination, decoration and the like, and has the characteristics of energy conservation, environmental protection, long service life, high luminous efficiency and the like. However, when it is required to synchronously control the changes of pattern, color, brightness, on-off, etc. according to a certain rule, it is necessary to add a corresponding controller to uniformly control the color and brightness of each LED light emitting unit for the lamps having a plurality of LED light emitting units, such as street lamps, building decorative lamps, etc.

The LED control method known by the inventor adopts a master-multi-slave cascade control method in which a control host is connected with a plurality of control slaves in series, and when a plurality of light emitting units to be controlled are more and the load capacity of a single host is limited, a plurality of hosts are required to be respectively cascaded with corresponding slaves, at this time, in order to achieve the synchronization of the control effects of each control unit at the same time, the situation that the overall display effects of each light emitting unit are not uniform due to time delay and the like is avoided, and one of the key points is that the synchronization of each control host is ensured, so that each slave can maintain good synchronization effects. In this regard, the inventor knows a host synchronization method that uses a synchronization network to connect each host in series, but in the process of implementing the technical solution in the embodiment of the present application, the inventor finds that at least the following technical problems exist in the above technology: the hosts are connected in series in a synchronous network cable mode, and when the distance between the control hosts is far, synchronous data packet loss and even synchronous play failure can be caused due to signal attenuation; when the exterior lights of large-scale building groups are synchronous, the hosts cannot be connected due to obstacles such as roads, rivers and the like existing between the buildings, so that synchronous playing cannot be realized.

The information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is well known to a person skilled in the art.

Disclosure of Invention

In view of at least one of the above technical problems, the present disclosure provides an LED synchronization controller based on a beidou satellite system, which guarantees time synchronization between hosts through timing of the beidou satellite system, and each host coordinates own playing time according to the time data, so as to solve the problem that the control effect is not synchronous or even cannot be synchronous when the existing hosts adopt a synchronization network to perform synchronization.

According to one aspect of the disclosure, an LED synchronous controller based on a Beidou satellite system is provided, and the LED synchronous controller comprises a main control unit, a Beidou satellite unit and a synchronous signal transmission unit which are correspondingly and communicatively connected with the main control unit respectively, and a power supply module for supplying power with different voltage levels;

the synchronous signal transmission unit comprises a data buffer which is correspondingly in communication connection with the main control unit communication unit and an output port which is correspondingly in communication connection with a corresponding data output port of the data buffer.

In some embodiments of the present disclosure, the main control unit is specifically a single-chip microcomputer, and the beidou satellite unit and the synchronization signal transmission unit are respectively in corresponding communication connection with a general I/O port of the single-chip microcomputer.

In some embodiments of the present disclosure, the power supply module includes an external power supply wiring port, a DC-DC step-down unit and/or a DC-DC step-up unit for converting an external power supply voltage level.

In some embodiments of the present disclosure, the beidou satellite unit includes a signal receiving chip and an antenna base electrically connected with a corresponding antenna signal input port of the signal receiving chip.

In some embodiments of the present disclosure, the data buffer is embodied as a 74HC245 bus transceiver.

In some embodiments of the present disclosure, the output port of the synchronization signal transmission unit includes a TTL port and/or an RS485 port; the RS485 port is correspondingly and electrically connected with the data buffer through an RS485 data transceiver.

In some embodiments of the present disclosure, the TTL port and/or the RS485 port specifically include plug-in terminals and/or RJ45 jacks.

In some embodiments of the present disclosure, a dial switch is further included that is electrically connected to the general I/O port of the main control unit.

One or more technical solutions provided in the embodiments of the present application at least have any one of the following technical effects or advantages:

1. by utilizing the consistency of Beidou satellite time service, the time synchronization of the LED synchronous controllers connected with all the LED control hosts is realized through the Beidou satellite signal receiving chip, so that each frame of LED playing data of all the control hosts is matched on a determined time point, and the technical problem that the LED control has time delay in the multi-host process in the prior art is solved.

2. The output port of the synchronous signal comprises a TTL port and an RS485 port, and is adapted to control hosts of different input types through two different level logic communication modes; the TTL port and the RS485 port comprise plug-in wiring terminals and RJ45 jacks so as to meet the requirement of an unused wiring mode; therefore, the applicability of the LED synchronous controller is improved.

3. And the corresponding relation between the LED playing data frames and the time is adjusted by shifting the dial switch to different gears, so that different time intervals between the data frames are used for controlling the playing speed of the LED.

Drawings

Fig. 1 is a schematic diagram of a terminal of a main control unit according to an embodiment of the present application.

Fig. 2 is a schematic circuit diagram of a beidou satellite unit in an embodiment of the present application.

Fig. 3 is a schematic circuit diagram of a data buffer and a pluggable connection terminal according to an embodiment of the present application.

Fig. 4 is a circuit diagram of an RS485 data transceiver according to an embodiment of the present application.

Fig. 5 is a schematic diagram of the connection of an RJ45 jack according to an embodiment of the present application.

Fig. 6 is a circuit diagram of a DC-DC voltage reducing unit according to an embodiment of the present application.

Fig. 7 is a circuit schematic of a DC-DC boost unit in an embodiment of the present application.

Fig. 8 is a schematic circuit diagram of a dial switch according to an embodiment of the present application.

Fig. 9 is a schematic diagram of an LED synchronization controller according to an embodiment of the present application.

In the above figures, U3 is a singlechip, U4 is a Beidou satellite signal receiving chip, IPX1 is an antenna pedestal, U5 is a 74HC245 bus transceiver, P5 is a pluggable wiring terminal, P3 and P4 are RJ45 jacks, U1 is a DC-DC voltage reduction unit, U2 is a DC-DC voltage boosting unit, S1 is a dial switch, 1 is an LED synchronous controller, 2 is a control host, and 3 is a control slave.

Detailed Description

The procedures involved or relied on in the following embodiments are conventional procedures or simple procedures in the technical field, and those skilled in the art can make routine selections or adaptation according to specific application scenarios.

The components and the like in the following examples are commercially available products unless otherwise specified.

For better understanding of the technical solutions of the present application, the following detailed description will refer to the accompanying drawings and specific embodiments.

The embodiment discloses LED synchronous controller based on big dipper satellite system, it includes main control unit, big dipper satellite unit and synchronous signal transmission unit, the power module that is used for different voltage grades that corresponds communication connection respectively with main control unit.

The main control unit is a control and data processing core of the LED synchronous controller, in this embodiment, the main control unit is a singlechip with a model of GD32F103C8T6, referring to FIG. 1, the singlechip adopts a DC3.3V power supply voltage, and in order to ensure the stability of a power supply, a filter capacitor is further arranged between a power supply and a power supply input port corresponding to the singlechip, so as to ensure the stability of the power supply voltage and avoid the influence of voltage fluctuation on the normal operation of the singlechip. Because the work of the singlechip is based on a certain working frequency, an external 12MHz quartz crystal oscillator is connected between the OSC_IN and the OSC_OUT of the singlechip, and two capacitors are connected IN parallel at two ends of the crystal oscillator for starting the crystal oscillator, so that the reliable working frequency is provided for the work of the singlechip. In order to restore the singlechip to the initial working state under special conditions, the degree is executed from the beginning, the NRST terminal of the singlechip is correspondingly connected with a reset circuit, in the example, power-on reset is adopted, a current-limiting resistor and a capacitor for realizing reset are connected in series between a 3.3V power supply and GND, the NRST terminal connected to the singlechip is led out from the current-limiting resistor and the capacitor, when the 3.3V power supply is connected, the NRST terminal voltage is O, the capacitor starts to charge until the capacitor is charged, the NRST terminal voltage rises, and the low-level reset is completed.

In order to realize time synchronization of the LED synchronous controllers, a Beidou satellite unit is arranged, and the Beidou satellite unit comprises a signal receiving chip and a corresponding antenna base. In this embodiment, a dual-mode signal receiving chip with a model number of ATGM332D is adopted, referring to fig. 2, in order to ensure the power supply continuity of the chip, the chip adopts a dual-power mode, its VBAT port adopts a dual diode to be respectively connected with a 3.3V power supply and a battery, and when the power supply problem occurs in the 3.3V power supply, the battery can timely replace the participating chip to supply power. IN order to better realize the receiving of the Beidou satellite signals, an RF_IN port of the signal receiving chip is correspondingly connected with an IPX antenna socket for externally connecting an antenna. In addition, TXD1 and RXD1 of the signal receiving chip are respectively connected with a general I/O port corresponding to the singlechip, so that transmission of Beidou satellite signal data is realized.

After the singlechip acquires the data transmitted by the Beidou satellite signal receiving chip, the signal is subjected to frequency division processing to obtain the millisecond number from the Beidou satellite time source, and the millisecond number is used as a synchronizing signal to transmit the synchronizing signal. The synchronous signal transmission unit comprises a data buffer which is correspondingly in communication connection with the main control unit communication unit and an output port which is correspondingly in communication connection with a corresponding data output port of the data buffer. Because the port of the singlechip has limited load capacity, the SYNC_OUT signal output from the port of the singlechip needs to be increased in driving capacity by a data buffer, and in the embodiment, a 74HC245 bus transceiver is adopted as the data buffer. Referring to fig. 3, E of the 74HC245 bus transceiver is not potential energy control, so the ground makes the chip work normally, and its DIR terminal controls the transmission direction of data, in this embodiment, DIR is grounded, i.e. B is input, and a is output. In addition, in order to increase the applicability of the LED controller and meet the logic levels of different communication modes, in this embodiment, sync_out synchronization signals are respectively driven three ways to meet the communication modes of RS485 and TTL levels. Referring to fig. 3, sync_out synchronizing signals are connected to input terminals of the 74HC245 bus transceivers B5, B6 and B7, so that corresponding synchronizing signals are output at corresponding A5, A6 and A7, and in order to achieve TTL level logic, after resistors R15 and R17 are respectively connected in series to the ports A6 and A7, a fuse F1 is connected in parallel as an output port ttl_out_b of TTL level, and the A5 terminal is used as an output port of RS485 signal, but as the level value of RS485 is relatively high, the requirements cannot be met only by the 74HC245 bus transceivers, so that the RS485 data transceiver is provided. In this embodiment, a data transceiver with a model number of SP485 is adopted, referring to fig. 4, the DI terminal of the data transceiver is correspondingly connected with the A5 port of 74HC245, and the A, B port of the data transceiver is used as the output out_ A, OUT _b, so as to obtain level logic meeting the RS485 communication requirement. In addition, in order to enable the wiring of the LED synchronous controller to meet the wiring requirements of different control hosts, a pluggable wiring terminal and an RJ45 socket capable of outputting a TTL level and an RS485 signal are provided in the present embodiment, and referring to fig. 3, each pin of the pluggable wiring terminal P5 is connected to a ttl_out_b and an out_ A, OUT _b as a TTL level output and an RS485 signal output terminal, respectively, allowing direct wiring through the pluggable wiring terminal; referring to fig. 5, two RJ45 jacks are employed as communication interfaces for TTL level and RS485 signals, respectively.

The LED synchronous controller has different power consumption voltage level requirements for devices, so that a power supply module is arranged, and comprises an external power supply wiring port, a DC-DC voltage reduction unit and/or a DC-DC voltage boosting unit for converting the voltage level of the external power supply. In this example, the external power connection port can input a class voltage within the range of DC5V-24V, but the power supply can not directly participate in power supply, and the input power supply can be reused after further processing. For this reason, referring to fig. 6, a DC-DC buck chip with a model SGM6232 is provided in this example, to buck-convert VCC with a high voltage level DC5V-24V to dc3.3v output voltage, so as to meet the power demand of a single-chip microcomputer or the like; for devices such as an RS485 data transceiver, a DC5V power supply is needed, and for this purpose, a DC-DC boost unit with the model LN2272 is provided in this example, see FIG. 7, to boost and convert the DC3.3V voltage output by the buck chip into a DC5V voltage, so as to meet the power consumption level requirement.

In this embodiment, a dial switch is further provided to control the playing control speed of the LED, referring to fig. 8, 4 is a dial switch S1, and the dial switch is used to dial to different gear positions, so that the switch combination data can be correspondingly transmitted to a general I/O port of the single-chip microcomputer correspondingly connected with the dial switch, and the output of the playing speed signal set by the dial switch is realized through a numerical value table set in the single-chip microcomputer, so as to adjust the playing speed of the LED.

When the LED synchronous controller is used, referring to fig. 9, in the example, twisted pair wires with crystal heads are adopted to be connected with control hosts through RJ45 ports corresponding to RS485 of the LED synchronous controller, and each control host communicates in a cascade mode of one master and multiple slaves. The LED synchronous controllers acquire the same time data containing time and minute and second to obtain a millisecond number from the same time source, then the control host aligns the played frame number and the millisecond number according to a certain time interval, so that the played data of each frame is set on a determined unified time point, and the time interval is adjusted according to the playing speed set by the dial switch, thereby realizing synchronous control.

While certain preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the utility model of the present application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. The LED synchronous controller based on the Beidou satellite system is characterized by comprising a main control unit, a Beidou satellite unit and a synchronous signal transmission unit which are correspondingly and communicatively connected with the main control unit respectively, and a power supply module for supplying power with different voltage levels;

2. The Beidou satellite system-based LED synchronous controller of claim 1, wherein the main control unit is a single chip microcomputer, and the Beidou satellite unit and the synchronous signal transmission unit are respectively in corresponding communication connection with a universal I/O port of the single chip microcomputer.

3. The Beidou satellite system based LED synchronization controller of claim 1, wherein the power module comprises an external power connection port, a DC-DC buck unit and/or a DC-DC boost unit for converting an external power supply voltage level.

4. The LED synchronization controller based on the beidou satellite system of claim 1, wherein the beidou satellite unit comprises a signal receiving chip and an antenna base electrically connected with an antenna signal input port corresponding to the signal receiving chip.

5. The Beidou satellite system based LED synchronization controller of claim 1, wherein the data buffer is embodied as a 74HC245 bus transceiver.

6. The Beidou satellite system-based LED synchronous controller of claim 1, wherein an output port of the synchronous signal transmission unit comprises a TTL port and/or an RS485 port; the RS485 port is correspondingly and electrically connected with the data buffer through an RS485 data transceiver.

7. The Beidou satellite system-based LED synchronization controller of claim 6, wherein the TTL ports and/or the RS485 ports specifically comprise pluggable wiring terminals and/or RJ45 jacks.

8. The Beidou satellite system-based LED synchronous controller of claim 1, further comprising a dial switch correspondingly and electrically connected with the main control unit universal I/O port.