CN219834164U

CN219834164U - Network playing terminal and broadcasting equipment with self-adaptive POE power supply

Info

Publication number: CN219834164U
Application number: CN202320814482.9U
Authority: CN
Inventors: 王恒; 郭远林; 伍巨猷; 吴家算
Original assignee: Guangzhou DSPPA Audio Co Ltd
Current assignee: Guangzhou DSPPA Audio Co Ltd
Priority date: 2023-04-12
Filing date: 2023-04-12
Publication date: 2023-10-13
Anticipated expiration: 2033-04-12

Abstract

The utility model discloses a network playing terminal and broadcasting equipment with self-adaptive POE power supply, wherein the network playing terminal comprises a loudspeaker, and further comprises a power supply identification circuit, a power supply module, a main control chip, a voltage amplitude limiting circuit and a power amplifying circuit; the embodiment of the utility model can support BT mode power supply, and meanwhile, the output power is switched by identifying different switch power supply modes and limiting the output power by utilizing the voltage limiting chip, so that the utility model can be widely applied to the technical field of audio circuits as a network playing terminal for self-adaptive POE power supply.

Description

Network playing terminal and broadcasting equipment with self-adaptive POE power supply

Technical Field

The utility model relates to the technical field of audio circuits, in particular to a network playing terminal and broadcasting equipment with self-adaptive POE power supply.

Background

With the continuous development of science and technology, power Over Ethernet (POE) is widely used for various network terminals. The POE power supply technology simultaneously provides electric quantity and data transmission for power receiving equipment supporting POE through a network cable, is not limited by a fixed power socket, and is also beneficial to reducing the installation and daily operation cost of an infrastructure. Therefore, more and more playing devices start to be powered by POE, but most POE network playing terminals cannot identify POE BT power supply standards at present, and the problem that no output or limited output power is caused by the fact that the terminals cannot be identified may occur.

Disclosure of Invention

In view of this, the embodiment of the present utility model provides a network playing terminal capable of identifying the POE BT power supply standard and adapting POE power supply, and in addition, in the embodiment of the present utility model, a corresponding device including the network playing terminal is also provided.

On one hand, the embodiment of the utility model provides a networked playing terminal with self-adaptive POE power supply, which comprises a loudspeaker, and the terminal also comprises a power supply identification circuit, a power supply module, a main control chip, a voltage amplitude limiting circuit and a power amplifying circuit;

the first output end of the power supply identification circuit is connected to the input end of the power supply module, and the second output end of the power supply identification circuit is connected to the input end of the voltage limiting circuit; the first output end of the power supply module is connected to the input end of the power supply identification circuit, the second output end of the power supply module is connected to the input end of the main control chip, the third output end of the power supply module is connected to the input end of the voltage limiting circuit, and the fourth output end of the power supply module is connected to the input end of the power amplifying circuit; the output end of the main control chip is connected to the input end of the voltage amplitude limiting circuit, the output end of the voltage amplitude limiting circuit is connected to the input end of the power amplifying circuit, and the output end of the power amplifying circuit is connected to the input end of the loudspeaker.

Optionally, the power supply identification circuit comprises a first filter circuit, a rectifier circuit and a POE identification chip; the output end of the first filter circuit is connected to the input end of the rectifying circuit, and the output end of the rectifying circuit is connected to the output end of the POE identification chip.

Optionally, the voltage limiting circuit includes a voltage limiting chip and an optocoupler control circuit, and the voltage limiting chip is connected with the optocoupler control circuit.

Optionally, the power amplifying circuit includes a power amplifying chip and a second filter circuit, an input end of the power amplifying chip is connected to an input end of the second filter circuit, and an output end of the second filter circuit is connected to the speaker.

Optionally, the network playing terminal further includes a network interface module, an output end of the network interface module is connected to the power supply identification circuit, and an output end of the network interface module is further connected to the main control chip.

Optionally, the power supply identification circuit further comprises an indicator light module, and the indicator light module is connected with the POE identification chip.

Optionally, the network interface module comprises an RJ45 network interface.

On the other hand, the embodiment of the utility model also provides a broadcasting device, which comprises the network playing terminal with adaptive POE power supply.

The technical scheme in the embodiment of the utility model has the following advantages: the embodiment of the utility model adopts the power supply identification circuit to identify the switches with different power supply modes, then controls the voltage through the voltage limiting chip, and outputs the voltage through the power amplification circuit, thereby being capable of meeting the use in different occasions.

Drawings

Fig. 1 is a block diagram of the overall structure of a network playing terminal with adaptive POE power supply according to the present utility model;

FIG. 2 is a schematic circuit diagram of a power supply identification circuit of the present utility model;

FIG. 3 is a schematic circuit diagram of a voltage limiting circuit according to the present utility model;

fig. 4 is a schematic circuit diagram of a power amplifying circuit according to the present utility model.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "length," "upper," "lower," "front," "rear," "left," "right," "top," "inner," "outer," "axial," "radial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As indicated in the background art, in the related art, most POE network play terminals cannot identify POE BT power supply standard, and when a 15W network voice pillar is only used on a switch supporting AT standard, if the network voice pillar is used on a switch supporting AF standard, the terminal cannot be identified, so that no output is generated, or the power supply can enter a protection state because of excessive power. If used on a switch of the BT standard, it may not be possible to identify the terminal resulting in no output or no BT mode power being entered. According to the IEEE802.3 standard, the power received by the network terminal is respectively: AF-12.95W, AT-25.5W, BT-71W. AT present, the main current POE network playing terminal power supply modes include an AT mode (POE+) and an AF mode (POE), and the BT mode (POE++) cannot be identified. The maximum power to the horn output is typically only about 15W after transmission loss.

The utility model is further explained and illustrated below with reference to the drawing and the specific embodiments of the present specification.

Referring to fig. 1, the embodiment of the utility model provides a networked playing terminal with self-adaptive POE power supply, which comprises a loudspeaker, and the terminal also comprises a power supply identification circuit, a power supply module, a main control chip, a voltage amplitude limiting circuit and a power amplifying circuit;

In the embodiment of the utility model, the power supply identification circuit is mainly used for receiving the power supply signal of the POE switch, identifying the power supply mode of the switch and outputting voltage to the power supply module. The power module comprises a DC-DC power supply processing chip, the conversion of the DC power supply level is completed through the chip, and power is supplied to each processing unit (comprising a main control chip, a voltage amplitude limiting circuit and a power amplifying circuit) of the networked playing terminal. The main control chip is mainly used for receiving the digital signals of the POE switch, carrying out network decoding processing through the chip, decoding the digital signals transmitted by the network into analog signals and outputting the analog signals to the voltage amplitude limiting circuit. The other output end of the power supply identification circuit is also connected to the voltage amplitude limiting circuit, and the voltage amplitude limiting circuit is controlled according to the power supply identification result. The voltage limiting circuit is mainly used for controlling voltage, and different maximum output voltages are set according to different switches obtained through recognition. And finally, outputting the audio signal to a power amplifying circuit through a voltage amplitude limiting circuit to amplify the power of fixed multiple, and outputting the audio signal to a loudspeaker to make sound. In one possible embodiment, the DC-DC power processing chip employs TX4138, a master chip SigmaStar SSD201 employing an ARM Cortex-A7 core.

Further as a preferred embodiment, the power supply identification circuit includes a first filter circuit, a rectifier circuit and a POE identification chip; the output end of the first filter circuit is connected to the input end of the rectifying circuit, and the output end of the rectifying circuit is connected to the output end of the POE identification chip.

Referring to fig. 2, in the embodiment of the present utility model, a switch may be connected through a network interface P1, a digital signal output by the switch is isolated by a transformer T1 and then enters a main control chip for processing, a power signal output by the switch passes through a first filter circuit formed by a capacitor bank (C4, C5, C6, C7, C8) and a resistor bank (R8, R10, R11, R12), then outputs a current, passes through a rectifier tube D1 and a rectifier tube D3, then enters a POE identification chip U1, so that the switch outputs a corresponding power, and lights LED1, LED2 and LED3 in a corresponding mode according to the output power, and finally outputs the power to a voltage limiting circuit. In the embodiment of the utility model, LINK represents connection, and VSS represents circuit common ground voltage; GND (group) represents a Ground line or a 0 line. Wherein the transformer T1 adopts Hanrun601680, C1-C8 represent capacitors, R1-R14 represent resistors, D1-D3 represent diodes, LED1-LED3 represent diodes, TX represents transmission, and RX represents reception. The POE identification chip U1 adopts TPS2373-4, pin 17 of the U1 chip is connected with LED2, AF-LED signals indicate that the POE standard of the switch obtained through identification is an AF mode, pin 18 of the U1 chip is connected with LED1, AT-LED signals indicate that the POE standard of the switch obtained through identification is an AT mode, pin 19 of the U1 chip is connected with LED3, and BT-LED signals indicate that the POE standard of the switch obtained through identification is a BT mode.

Further as a preferred embodiment, the voltage limiting circuit includes a voltage limiting chip and an optocoupler control circuit, and the voltage limiting chip is connected with the optocoupler control circuit.

Referring to fig. 3, the main control chip decodes a digital signal transmitted from the network into an analog signal, the analog signal enters the voltage limiting chip U2 after dc is cut off by the capacitor C11, the pin 6 of the voltage limiting chip U2 is controlled by an optocoupler control circuit, and the optocoupler control circuit is composed of 3 optocoupler resistors, for example: when the switch is identified to be powered in the BT mode, the BT-LED signal is reduced, the LED3 is turned on, the optocoupler is turned on, the resistance value of the maximum output value of the voltage limiting chip U2 according to R20 is set, when the switch is identified to be powered in the AT mode, the AT-LED signal is pulled down, the LED1 is turned on, the optocoupler is turned on, and the resistance value of the maximum output value of the voltage limiting chip U2 according to R25 is set. Different maximum output voltages are set according to different switches. The audio signal is then output to a power amplifier that performs a fixed multiple. In the embodiment of the utility model, the voltage limiting chip U2 adopts NJM2761, R20, R21, R22, R23, R25 and R27 to represent resistors, C9, C11, C13 and C17 to represent capacitors, AGND to represent analog ground, INA to represent audio signal input, and the input is connected with pins 3 and 8 of the voltage limiting chip U2 and then output through pins 2 and 9 of the voltage limiting chip.

Further as a preferred embodiment, the power amplification circuit includes a power amplification chip and a second filter circuit, an input terminal of the power amplification chip is connected to an input terminal of the second filter circuit, and an output terminal of the second filter circuit is connected to the speaker.

Referring to fig. 4, the power amplifying chip uses TPA3116, the amplification factor can be set independently through a resistor R19 and a resistor R24, the audio signal transmitted from the voltage limiting circuit enters the power amplifying chip U3 after passing through a capacitor C16 and a resistor R16, and whether the power amplifying chip U3 works can be set through a resistor R15. The power supply filter circuit is composed of capacitors C10, C12, C28 and C29. Finally, outputting the signal amplified by the power amplifying chip U3 to a second filter circuit formed by connecting the inductors L1 and L2; and outputting the filtered sound to a loudspeaker to emit sound. Wherein C10-C29 represent capacitors, and R16-R19 and R26 represent resistors.

Further as a preferred embodiment, the network playing terminal further includes a network interface module, an output end of the network interface module is connected to the power supply identification circuit, and an output end of the network interface module is further connected to the main control chip.

In the embodiment of the utility model, the networked playing terminal further comprises a network interface module, wherein the network interface module is used for being connected with an external switch, outputting a power supply signal to the power supply identification circuit through the network interface module for switch mode identification, and outputting a digital signal to the main control chip through the network interface module for decoding to obtain an analog signal.

Further as a preferred embodiment, the power supply identification circuit further includes an indicator light module, and the indicator light module is connected with the POE identification chip.

In the embodiment of the utility model, the indicator light module can adopt LED indicator lights, and the POE mode connected with the switch is indicated by lighting different indicator lights. And the POE identification chip identifies the switches with different power supply modes, then the power supply mode LED indicator lamp is lightened, different resistance control gears are triggered through the optocoupler to control the voltage passing through the voltage limiting chip, and then the power is output through the power amplifying circuit.

Further as a preferred embodiment, the network interface module comprises an RJ45 network interface.

In a feasible implementation mode of the utility model, when the network playing terminal needs to output high power, when the switch with BT standard is used for supplying power, the switch mode is identified through the POE identification module and the voltage limiting circuit is controlled to be automatically switched to 40W for output; when only an AT standard switch exists on site, the power output is automatically switched to 15 watts; when only the AF standard switch is on site, the switch is automatically switched to 8W power output.

In summary, compared with the prior art, the utility model has the following advantages:

1. the embodiment of the utility model adopts the identification guide to POE power reception, can identify the switch with AF, AT and BT modes for power supply, is designed according to high power during design, and can meet the use requirements of different occasions.

2. The embodiment of the utility model can be adapted to a switch with BT mode (POE++), has larger output power than the traditional POE power supply networking terminal, and can output a POE network playing terminal with about 60W power after network line transmission loss is removed.

3. The embodiment of the utility model can be automatically adapted to the switch, and according to the switch switching output power, the switch-in BT switch horn outputs about 60W of power, and the switch-in AT switch outputs about 15W of power. Since the output circuit limits the output power, the protection state is avoided when the AT switch is accessed because the output power is overlarge.

While the preferred embodiment of the present utility model has been described in detail, the present utility model is not limited to the above embodiments, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present utility model, and these equivalent modifications and substitutions are intended to be included in the scope of the present utility model as defined in the appended claims.

Claims

1. The utility model provides a networking broadcast terminal of self-adaptation POE power supply, includes speaker, its characterized in that: the terminal also comprises a power supply identification circuit, a power supply module, a main control chip, a voltage amplitude limiting circuit and a power amplifying circuit;

2. The network play terminal with adaptive POE power supply of claim 1, wherein: the power supply identification circuit comprises a first filter circuit, a rectifier circuit and a POE identification chip; the output end of the first filter circuit is connected to the input end of the rectifying circuit, and the output end of the rectifying circuit is connected to the output end of the POE identification chip.

3. The network play terminal with adaptive POE power supply of claim 1, wherein: the voltage limiting circuit comprises a voltage limiting chip and an optocoupler control circuit, and the voltage limiting chip is connected with the optocoupler control circuit.

4. The network play terminal with adaptive POE power supply of claim 1, wherein: the power amplification circuit comprises a power amplification chip and a second filter circuit, wherein the input end of the power amplification chip is connected to the input end of the second filter circuit, and the output end of the second filter circuit is connected to the loudspeaker.

5. The network play terminal with adaptive POE power supply of claim 1, wherein: the network playing terminal further comprises a network interface module, wherein the output end of the network interface module is connected to the power supply identification circuit, and the output end of the network interface module is further connected to the main control chip.

6. The network play terminal with adaptive POE power supply of claim 2, wherein: the power supply identification circuit further comprises an indicator light module, and the indicator light module is connected with the POE identification chip.

7. The network play terminal powered by adaptive POE of claim 5, wherein: the network interface module includes an RJ45 network interface.

8. A broadcasting device, characterized in that the device comprises an adaptive POE powered networked playback terminal as recited in any one of claims 1 to 7.