Repeater applied to wired intelligent conference system and wired intelligent conference system

Abstract

The utility model relates to a repeater applied to a wired intelligent conference system and the wired intelligent conference system. The repeater comprises a power supply unit, a host interface, a unit interface and a signal processing unit, the power supply unit controls the power-on or power-off of the repeater according to a signal of the host, and supplies power to the conference unit through the unit interface when the repeater is powered on; the host interface executes signal transmission between the signal processing unit and a host; the signal processing unit encodes, decodes, enhances and restores a control signal accessed by the host interface, and then transmits the control signal to the conference unit through the unit interface; the unit interfaces transmit audio signals of the conference units to the host through the host interface. According to the utility model, the signal relay processing between the host and the conference units can be realized, so that the host can master the real information of the conference system, the signal enhancement can be realized, the effective transmission distance of the control signal is extended, and the number of the conference units connected with the system is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of conference systems, and more specifically, to a repeater applied to a wired intelligent conference system and a wired intelligent conference system. Background Art

[0002] The wired intelligent conference system is mainly composed of a central controller, conference units and connecting cables. The system adopts wired digital control (SR485 control bus) and the control host centrally supplies power to the conference units through cables. In actual use, when the length of the connecting cable or the number of connected units exceeds the limit (the standard RS485 control bus can connect to 32 communication nodes), there are problems such as insufficient power supply, large cable voltage drop, and excessive RS485 signal attenuation, which lead to unstable operation of the conference unit and the conference system. Therefore, a repeater with power supply and RS485 signal regeneration function will provide guarantee for long-distance and multi-unit access of the wired intelligent conference system.

[0003] The repeaters of traditional wired intelligent conference systems mostly use circuits to regenerate RS485 control signals. Although this method is simple to implement, it cannot represent the information of the repeater communication nodes and the subnet information of the local area network composed of the repeater and subsequent units. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a repeater applied to a wired intelligent conference system and a wired intelligent conference system in view of the problems existing in the prior art.

[0005] The technical solution adopted by the utility model to solve the technical problem is: construct a repeater applied to a wired intelligent conference system, including: a power supply unit connected to an external power supply, a host interface connected to a host, a unit interface, and a signal processing unit arranged between the unit interface and the host interface;

[0006] The power supply unit is connected to the signal processing unit and the unit interface, and is used to control the power on or off of the repeater according to the signal of the host, and to supply power to the conference unit through the unit interface when the repeater is powered on;

[0007] The host interface is used to perform signal transmission between the signal processing unit and the host;

[0008] The signal processing unit is used to encode, decode, enhance and restore the control signal received by the host interface, and transmit it to the conference unit through the unit interface;

[0009] The unit interface is connected to the host interface and is used to transmit the audio signal of the conference unit to the host through the host interface.

[0010] The repeater used in the wired intelligent conference system of the utility model further includes: a first transmission cable and a second transmission cable;

[0011] The first transmission cable is arranged between the conference unit and the unit interface, and is used to transmit the power signal generated by the power supply unit to the conference unit;

[0012] The second transmission cable is arranged between the host and the host interface, and is used to transmit the audio signal of the conference unit to the host.

[0013] In the repeater applied to the wired intelligent conference system described in the utility model, the signal processing unit includes: a first codec chip connected to the host interface, an MCU control chip connected to the first codec chip, and a second codec chip connected to the MCU control chip;

[0014] The first codec chip is used to encode and decode the control signal transmitted by the host interface;

[0015] The MCU control chip is used to perform signal enhancement processing on the control signal processed by the first codec chip and then transmit it to the second codec chip;

[0016] The second codec chip is used to restore the control signal after enhanced processing by the MCU control chip and output it to the unit interface.

[0017] In the repeater applied to the wired intelligent conference system described in the utility model, the first codec chip and the second codec chip are the same codec chip.

[0018] In the repeater used in the wired intelligent conference system of the utility model, the power supply unit includes: a switch module, an input module, a filter processing module and a voltage reduction module;

[0019] The input end of the switch module is connected to the host, the output end of the switch module is connected to the input end of the input module, the output end of the input module is connected to the input end of the filter processing module, the output end of the filter processing module is connected to the input end of the step-down module, and the output end of the step-down module is respectively connected to the unit interface and the signal processing unit.

[0020] In the repeater applied to the wired intelligent conference system described in the utility model, the switch module includes: a seventeenth resistor, a fourth diode and a control switch;

[0021] The first end of the seventeenth resistor is connected to the host interface, the second end of the seventeenth resistor is connected to the anode of the fourth diode and the first end of the control switch, the cathode of the fourth diode and the fourth end of the control switch are connected to the host, the second end of the control switch is connected to the external power supply to access the external power signal, and the fifth end of the control switch is connected to the input end of the input module.

[0022] In the repeater applied to the wired intelligent conference system described in the utility model, the input module includes: a first capacitor, a second capacitor, a third capacitor and a fuse; the filtering processing module includes: a power inductor, a second diode, a fourth capacitor, a fifth capacitor, a sixth capacitor, a nineteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a first resistor, a fourth resistor, an eighth resistor, a twenty-second capacitor, a seventh resistor, a twentieth capacitor and a twenty-first capacitor;

[0023] The first capacitor, the second capacitor, and the third capacitor are sequentially arranged between the output end of the switch module and the input end of the fuse, and the first capacitor, the second capacitor, and the third capacitor are connected in parallel, the output end of the fuse is respectively connected to the first end of the power inductor and the unit interface, the third end of the power inductor is grounded, the second end of the power inductor is connected to the cathode of the second inductor, the anode of the second inductor is connected to the fourth end of the power inductor, and the fourth capacitor, the fifth capacitor, the sixth capacitor, the nineteenth capacitor, the fifteenth capacitor, and the sixteenth capacitor are sequentially connected in parallel with the second diode;

[0024] The first end of the first resistor is connected to the second end of the power inductor and the first end of the sixteenth capacitor, the second end of the first resistor is connected to the first end of the fourth resistor, the second end of the fourth resistor is connected to the first end of the eighth resistor and the step-down module, the second end of the eighth resistor is grounded, the first end of the twenty-second capacitor is grounded, the second end of the twenty-second capacitor is connected to the step-down module, the second end of the seventh resistor and the second end of the twenty-first capacitor are grounded, the first end of the seventh resistor is connected to the second end of the twentieth capacitor, and the first end of the twentieth capacitor and the first end of the twenty-first capacitor are connected to the step-down module.

[0025] In the repeater applied to the wired intelligent conference system described in the utility model, the step-down module includes: a step-down chip and its peripheral circuit; the peripheral circuit includes: a seventh capacitor, a third diode, a first inductor, a seventeenth capacitor, an eighteenth capacitor, a sixth resistor, a second resistor and a fifth resistor;

[0026] The second pin of the buck chip is connected to the first end of the first resistor, the third pin of the buck chip is connected to the second end of the fourth resistor, the fourth pin of the buck chip is connected to the second end of the twenty-second capacitor, and the sixth pin of the buck chip is connected to the first end of the twenty-second capacitor and the first end of the twenty-first capacitor;

[0027] The eighth pin of the buck chip is connected to the first end of the seventh capacitor and the first end of the first inductor, the first pin of the buck chip is connected to the second end of the seventh capacitor, the fifth pin of the buck chip is connected to the second end of the sixth resistor, and the seventh pin of the buck chip is grounded; the second end of the first inductor is grounded through the seventeenth capacitor, the cathode of the third diode is connected to the first end of the first inductor, the anode of the third diode is grounded, the first end of the eighteenth capacitor is connected to the second end of the first inductor, the second end of the eighteenth capacitor is connected to the first end of the sixth resistor and connected to the ground, the first end of the fifth resistor is connected to the second end of the sixth resistor, the second end of the fifth resistor is connected to the first end of the second resistor, the second end of the second resistor is connected to the second end of the first inductor, and the connecting end of the second end of the second resistor and the second end of the first inductor is connected to the signal processing unit.

[0028] In the repeater applied to the wired intelligent conference system of the utility model, the signal processing unit further comprises: a power supply signal processing circuit;

[0029] The power supply signal processing circuit includes: a magnetic bead, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a twentieth resistor and an LED lamp;

[0030] The input end of the magnetic bead is connected to the output end of the power supply unit, the output end of the magnetic bead is connected to the first end of the 20th resistor and the first end of the eighth capacitor, the second end of the 20th resistor is connected to the anode of the LED lamp, the cathode of the LED lamp is grounded, and the second end of the eighth capacitor is grounded;

[0031] The ninth capacitor, the tenth capacitor, the eleventh capacitor, the twelfth capacitor, the thirteenth capacitor and the fourteenth capacitor are sequentially connected in parallel with the eighth capacitor, and the first end of the fourteenth capacitor is respectively connected to the first codec chip, the second codec chip and the MCU control chip.

[0032] The utility model also provides a wired intelligent conference system, comprising: the above-mentioned repeater applied to the wired intelligent conference system.

[0033] The repeater and wired intelligent conference system applied to the wired intelligent conference system by implementing the utility model have the following beneficial effects: including: a power supply unit, a host interface, a unit interface and a signal processing unit; the power supply unit controls the power on or off of the repeater according to the signal of the host, and supplies power to the conference unit through the unit interface when the repeater is powered on; the host interface performs signal transmission between the signal processing unit and the host; the signal processing unit encodes, decodes, enhances and restores the control signal received by the host interface, and transmits it to the conference unit through the unit interface; the unit interface transmits the audio signal of the conference unit to the host through the host interface. The utility model can realize the signal relay processing between the host and the conference unit, so that the host can grasp the real information of the conference system, and can also realize the enhancement of the signal, extend the effective transmission distance of the control signal, and expand the number of conference units connected to the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0035] Figure 1 It is a structural schematic diagram of a repeater applied to a wired intelligent conference system provided by the utility model;

[0036] Figure 2 and Figure 3 is a wiring diagram of a first transmission cable and a second transmission cable;

[0037] Figures 4 to 13 This is a circuit schematic diagram of an embodiment of a repeater provided by the utility model and applied to a wired intelligent conference system;

[0038] Fig.14 It is a system architecture diagram of the wired intelligent conference system provided by the utility model. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] In order to solve the problem that the existing repeater cannot represent the information of the repeater communication node and the subnet information of the local area network between the repeater and the subsequent units, the utility model provides a repeater, which receives the RS485 signal from one side of the host (i.e., the central controller) and then retransmits it to the other side, which can not only achieve the purpose of enhancing the signal amplitude, but also collect the information of the conference unit connected to the other side and transmit it to the host, so that the host can grasp the communication node information of the repeater and the subnet information of the local area network between the repeater and the subsequent units, and then understand the real information of the conference system (such as the real network topology), which is beneficial to the management and monitoring of the system. In addition, since the repeater works in an unattended state, the utility model controls the power on (power on and off) of the repeater through the host, realizing the linkage between the relay subnet and the central control system and other conference units.

[0041] refer to Figure 1 , Figure 1 This is a structural diagram of a preferred embodiment of the repeater provided by the utility model.

[0042] Specifically, Figure 1 As shown, the repeater applied to the wired intelligent conference system includes: a power supply unit 10 connected to an external power supply, a host interface 20 connected to a host, a unit interface 40 and a signal processing unit 30 arranged between the unit interface 40 and the host interface 20.

[0043] Specifically, the power supply unit 10 is connected to the signal processing unit 30 and the unit interface 40, and is used to control the power on or off of the repeater according to the signal of the host, and to supply power to the conference unit through the unit interface 40 when the repeater is powered on; the host interface 20 is used to perform signal transmission between the signal processing unit 30 and the host; the signal processing unit 30 is used to encode, decode, enhance and restore the control signal received by the host interface 20, and transmit it to the conference unit through the unit interface 40; the unit interface 40 is connected to the host interface 20, and is used to transmit the audio signal of the conference unit to the host through the host interface 20. It should be noted here that the connection between the unit interface 40 and the host interface 20 means that on the PCB board, the unit interface 40 and the host interface 20 are directly connected through the transmission line on the PCB board, so that the audio signal is transmitted to the host interface 20 through the transmission line, so that the purpose of avoiding the superposition of other noises on the transmitted audio signal can be achieved, and the audio signal can be kept clean and stable without any processing on any circuit, thereby ensuring the stability and reliability of the audio signal.

[0044] In this embodiment, by setting the power supply unit 10, the power supply signal provided by the external power supply can be connected, and the power-on and power-off control of the relay can be realized based on the control of the host, so that when the host is powered on, the repeater is automatically powered on, and when the host is powered off, the repeater is automatically powered off, realizing the true sense of unattended repeater automatic linkage with the central controller. At the same time, the power supply unit 10 directly supplies power to the unit interface 40, so that the conference units carried by the repeater are all powered by the repeater, avoiding additional power consumption on the host side, reducing the power burden of the host, and no matter how many conference units are carried behind the repeater, it will not affect the normal operation of the front unit.

[0045] Furthermore, in this embodiment, the signal processing unit 30 processes the received control signal and then forwards it, thereby realizing the relay and regeneration of the RS485 control signal, extending the effective transmission distance of the control signal, and expanding the number of conference units connected to the system.

[0046] In addition, in this embodiment, the audio signal is directly transmitted to the host, which can not only ensure that the audio signal will not be polluted and affected by other electrical noise when passing through the repeater of the utility model, but also ensure the stable transmission of the audio signal.

[0047] Further, in the embodiment of the present utility model, if Figure 1 As shown, the repeater applied to the wired intelligent conference system also includes: a first transmission cable 50 and a second transmission cable 60. The first transmission cable 50 is arranged between the conference unit and the unit interface 40, and is used to transmit the power signal generated by the power supply unit 10 to the conference unit; the second transmission cable 60 is arranged between the host and the host interface 20, and is used to transmit the audio signal of the conference unit to the host.

[0048] Optionally, in this embodiment, the first transmission cable 50 and the second transmission cable 60 are the same dedicated six-core cables, and by using the dedicated six-core cables, stable and reliable signal transmission can be achieved. Among them, the dedicated six-core cable can be a cable with male and female connectors at both ends of the IPS / CF-C1132-20 series 6-core main cable.

[0049] Specifically, in a preferred embodiment, Figure 2 and Figure 3 As shown in FIG. 1 , it is a wiring diagram of the first transmission cable 50 and the second transmission cable 60. Since the first transmission cable 50 and the second transmission cable 60 are cables of the same structure, the first transmission cable 50 is taken as an example for description below. Specifically, Figure 2 This is the female connector wiring diagram of the first transmission cable 50. Figure 3: is the male connector wiring diagram of the first transmission cable 50. Among them, the white and green wire cores transmit control signals, the red and black wire cores transmit power signals, and the yellow and black wire cores transmit audio signals.

[0050] In some embodiments, the power supply unit 10 includes: a switch module 11, an input module 12, a filtering processing module 13 and a step-down module 14; the input end of the switch module 11 is connected to the host, the output end of the switch module 11 is connected to the input end of the input module 12, the output end of the input module 12 is connected to the input end of the filtering processing module 13, the output end of the filtering processing module 13 is connected to the input end of the step-down module 14, and the output end of the step-down module 14 is respectively connected to the unit interface 40 and the signal processing unit 30.

[0051] Specifically, the switch module 11 is used to control the power on and off of the repeater, so as to realize the on and off control of the repeater by the host, and realize true unattended operation. The input module 12 is used to convert the power signal provided by the external power supply transmitted by the switch module 11 to obtain a 24V power supply signal. The filtering processing module 13 is used to filter the 24V power supply signal to remove ripples and improve the stability and reliability of the signal. The step-down module 14 is used to step down the 24V power supply signal to obtain the operating voltage (i.e. 3.3V) required for the internal devices and chips of the repeater.

[0052] In some embodiments, the host interface 20 and the unit interface 40 are both 6-pin female socket interfaces, which can realize the transmission of control signals, audio signals, and power signals. Figure 8 As shown, the unit interface 40 is as Fig. 9 shown.

[0053] In some embodiments, Figure 1 As shown, the signal processing unit 30 includes: a first codec chip 31 connected to the host interface 20 , an MCU control chip 32 connected to the first codec chip 31 , and a first codec chip 33 connected to the MCU control chip 32 .

[0054] The first codec chip 31 is used to encode and decode the control signal transmitted by the host interface 20; the MCU control chip 32 is used to perform signal enhancement processing on the control signal processed by the first codec chip 31 and transmit it to the first codec chip 33; the first codec chip 33 is used to restore the control signal after the enhancement processing by the MCU control chip 32 and output it to the unit interface 40.

[0055] The first codec chip 31 and the first codec chip 33 are the same codec chip. Optionally, the first codec chip 31 and the first codec chip 33 can both be SP3075EE chips.

[0056] The repeater of the present utility model is described in detail below with reference to a specific embodiment.

[0057] Specifically, refer to Figures 4 to 13 In this embodiment, the switch module 11 includes: a seventeenth resistor R17, a fourth diode D4 and a control switch.

[0058] The first end of the seventeenth resistor R17 is connected to the host interface 20, the second end of the seventeenth resistor R17 is connected to the anode of the fourth diode D4 and the first end of the control switch, the cathode of the fourth diode D4 and the fourth end of the control switch are connected to the host, the second end of the control switch is connected to the external power supply to access the external power signal, and the fifth end of the control switch is connected to the input end of the input module 12.

[0059] Optionally, in this embodiment, the control switch may be a relay J1. Figure 4 As shown, when the fourth pin of relay J1 is connected to a power-on signal, relay J1 is closed. At this time, the repeater is connected to the power supply and the repeater is powered on; when the signal on the fourth pin of relay J1 is disconnected, relay J1 is disconnected. At this time, the repeater is powered off; the on-off control of the power supply to the repeater is realized.

[0060] In this embodiment, if Figure 5 Shown and Figure 6 As shown, the input module 12 includes: a first capacitor C1, a second capacitor C2, a third capacitor C3 and a fuse J4; the filtering processing module 13 includes: a power inductor G1, a second diode D2, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a nineteenth capacitor C19, a fifteenth capacitor C15, a sixteenth capacitor C16, a first resistor R1, a fourth resistor R4, an eighth resistor R8, a twenty-second capacitor C22, a seventh resistor R7, a twentieth capacitor C20 and a twenty-first capacitor C21. Among them, the fuse J4 is a self-recovering fuse, which can play a role in protecting the subsequent circuit.

[0061] The first capacitor C1, the second capacitor C2, and the third capacitor C3 are sequentially arranged between the output end of the switch module 11 (i.e., the fifth pin of the relay J1) and the input end of the fuse J4, and the first capacitor C1, the second capacitor C2, and the third capacitor C3 are connected in parallel, the output end of the fuse J4 is respectively connected to the first end of the power inductor G1 and the unit interface 40, the third end of the power inductor G1 is grounded, the second end of the power inductor G1 is connected to the cathode of the second inductor, and the anode of the second inductor is connected to the fourth end of the power inductor G1, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, the nineteenth capacitor C19, the fifteenth capacitor C15, and the sixteenth capacitor C16 are sequentially connected in parallel with the second diode D2 The first end of the first resistor R1 is connected to the second end of the power inductor G1 and the first end of the sixteenth capacitor C16, the second end of the first resistor R1 is connected to the first end of the fourth resistor R4, the second end of the fourth resistor R4 is connected to the first end of the eighth resistor R8 and the step-down module 14, the second end of the eighth resistor R8 is grounded, the first end of the twenty-second capacitor C22 is grounded, the second end of the twenty-second capacitor C22 is connected to the step-down module 14, the second end of the seventh resistor R7 and the second end of the twenty-first capacitor C21 are grounded, the first end of the seventh resistor R7 is connected to the second end of the twentieth capacitor C20, the first end of the twentieth capacitor C20 and the first end of the twenty-first capacitor C21 are connected to the step-down module 14.

[0062] like Figure 7 As shown, the buck module 14 includes: a buck chip U1 and its peripheral circuit; the peripheral circuit includes: a seventh capacitor C7, a third diode D3, a first inductor L1, a seventeenth capacitor C17, an eighteenth capacitor C18, a sixth resistor R6, a second resistor R2 and a fifth resistor R5;

[0063] The second pin of the buck chip U1 is connected to the first end of the first resistor R1, the third pin of the buck chip U1 is connected to the second end of the fourth resistor R4, the fourth pin of the buck chip U1 is connected to the second end of the twenty-second capacitor C22, the sixth pin of the buck chip U1 is connected to the first end of the twentieth capacitor C20 and the first end of the twenty-first capacitor C21; the eighth pin of the buck chip U1 is connected to the first end of the seventh capacitor C7 and the first end of the first inductor L1, the first pin of the buck chip U1 is connected to the second end of the seventh capacitor C7, the fifth pin of the buck chip U1 is connected to the second end of the sixth resistor R6, and the seventh pin of the buck chip U1 is grounded; the first inductor L1 is connected to the first end of the seventh capacitor C7 and the first end of the first inductor L1, the first pin of the buck chip U1 is connected to the second end of the seventh capacitor C7, the fifth pin of the buck chip U1 is connected to the second end of the sixth resistor R6, and the seventh pin of the buck chip U1 is grounded; The second end of the inductor L1 is grounded through the seventeenth capacitor C17, the cathode of the third diode D3 is connected to the first end of the first inductor L1, the anode of the third diode D3 is grounded, the first end of the eighteenth capacitor C18 is connected to the second end of the first inductor L1, the second end of the eighteenth capacitor C18 is connected to the first end of the sixth resistor R6 and connected to the ground, the first end of the fifth resistor R5 is connected to the second end of the sixth resistor R6, the second end of the fifth resistor R5 is connected to the first end of the second resistor R2, the second end of the second resistor R2 is connected to the second end of the first inductor L1, and the connection end of the second end of the second resistor R2 and the second end of the first inductor L1 is connected to the signal processing unit 30.

[0064] like Fig.10 As shown, the signal processing unit 30 further includes: a power supply signal processing circuit 34 .

[0065] The power supply signal processing circuit 34 includes: a magnetic bead FB, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a twentieth resistor R20 and an LED lamp.

[0066] The input end of the magnetic bead FB is connected to the output end of the power supply unit 10, the output end of the magnetic bead FB is connected to the first end of the twentieth resistor and the first end of the eighth capacitor C8, the second end of the twentieth resistor R20 is connected to the anode of the LED lamp, the cathode of the LED lamp is grounded, and the second end of the eighth capacitor C8 is grounded; the ninth capacitor C9, the tenth capacitor C10, the eleventh capacitor C11, the twelfth capacitor C12, the thirteenth capacitor C13 and the fourteenth capacitor C14 are connected in parallel with the eighth capacitor C8 in sequence, and the first end of the fourteenth capacitor C14 is respectively connected to the first codec chip 31, the first codec chip 33 and the MCU control chip 32.

[0067] The power supply signal processing circuit 34 can convert VCC+3.3V into VDD_3.3V to provide the first codec chip 31 , the first codec chip 33 and the MCU control chip 32 .

[0068] Furthermore, if Figures 11 to 13As shown, the eighth pin of the first codec chip 31 is connected to the first end of the fourteenth capacitor C14. The second pin of the first codec chip 31 is connected to the forty-fourth pin of the MCU control chip 32 through the sixteenth resistor R16, the first pin of the first codec chip 31 is connected to the fifty-fourth pin of the MCU control chip 32, and the fourth pin of the first codec chip 31 is connected to the fifty-third pin of the MCU control chip 32. The eighth pin of the first codec chip 33 is connected to the first end of the fourteenth capacitor C14, the second pin of the first codec chip 33 is connected to the forty-first pin of the MCU control chip 32 through the fifteenth resistor R15, the fifty-first pin of the MCU control chip 32 is connected to the fourth pin of the first codec chip 33, the fifty-second pin of the MCU control chip 32 is connected to the first pin of the first codec chip 33, and the first pin, the thirteenth pin, the thirty-second pin, the forty-eighth pin, the sixty-fourth pin and the nineteenth pin of the MCU control chip 32 are connected together and connected to the first end of the fourteenth capacitor C14 to access VDD_3.3V. As shown in the figure, the MCU control chip 32 can be a GD32F105RCT6 chip. In the figure, U2 is the MCU control chip 32, U4 is the first codec chip 31, and U5 is the second codec chip 33.

[0069] By implementing the repeater of the utility model, an external power supply is adopted and controlled by the host. When the host is powered on, the repeater is powered on, and when the host is powered off, the repeater is powered off. Compared with the traditional repeater (the power switch is set in the repeater), when the user turns off the power of the host, the power of the repeater also needs to be turned off, which makes it very inconvenient to use. The utility model controls the power switch (i.e., the control switch) to the host. When the host is powered off, the power switch is controlled to be disconnected, and the repeater can be powered off. When the host is powered on, the power switch is controlled to be closed, and the repeater can be powered on, which brings great convenience to the user.

[0070] In addition, the utility model adopts the first codec chip 31 to encode and decode the control signal, which is then processed by the GD32F105RCT6 chip, and then restored by the first codec chip 33 before being transmitted, thereby achieving signal relay and signal enhancement, thereby realizing the relay and regeneration of the RS485 control signal, extending the effective transmission distance of the control signal, and expanding the number of conference units connected to the system.

[0071] Furthermore, in order to prevent the audio signal from being interfered with, the utility model adopts the optimal wiring method, that is, after the audio signal is connected through the unit interface 40, the connected audio signal does not need to pass through other devices or circuits on the PCB board, and the audio signal is directly transmitted to the host interface 20 through the transmission line on the PCB board, and then the audio signal is directly transmitted from the host interface 20 to the host through the second transmission cable 60. This can avoid the superposition of other noises on the transmitted audio signal, and this method does not require any processing on any circuit to keep the audio signal clean and stable.

[0072] Furthermore, if Fig.14 As shown, the utility model also provides a wired intelligent conference system, and the wired intelligent conference system includes: a repeater applied to a wired intelligent conference system disclosed in an embodiment of the utility model. Fig.14 The central controller in Figure 1 The host.

[0073] like Fig.14 As shown, by setting the repeater, the wired intelligent conference system can receive the RS485 signal of the RS485 subnet (central controller LAN) on one side through the MCU control chip 32, and then retransmit it to the RS485 subnet (repeater LAN) on the other side. The MCU control chip 32 forwards the RS485 line signal to the two subnets respectively, and the signal amplitude is enhanced. In addition, the MCU control chip 32 of the repeater will collect the conference unit information of the repeater subnet and upload it to the central controller. The central controller obtains the real network topology of the conference system, which is beneficial to the management and monitoring of the system. The utility model takes into account that the repeater works in an unattended state, and the central controller should decide whether to power on or off the intermediate subnet. Therefore, a power supply unit 10 is designed in the utility model, which is controlled by the switch state of the central controller, and realizes the linkage between the relay subnet, the central control system and other conference units.

[0074] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot limit the protection scope of the utility model. All equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A repeater used in a wired intelligent conference system, characterized in that: include: A power supply unit connected to an external power supply, a host interface connected to a host, a unit interface, and a signal processing unit arranged between the unit interface and the host interface; The power supply unit is connected to the signal processing unit and the unit interface, and is used to control the power on or off of the repeater according to the signal of the host, and to supply power to the conference unit through the unit interface when the repeater is powered on; The host interface is used to perform signal transmission between the signal processing unit and the host; The signal processing unit is used to encode, decode, enhance and restore the control signal received by the host interface, and transmit it to the conference unit through the unit interface; The unit interface is connected to the host interface and is used to transmit the audio signal of the conference unit to the host through the host interface.

2. The repeater used in the wired intelligent conference system according to claim 1, characterized in that: Also includes: a first transmission cable and a second transmission cable; The first transmission cable is arranged between the conference unit and the unit interface, and is used to transmit the power signal generated by the power supply unit to the conference unit; The second transmission cable is arranged between the host and the host interface, and is used to transmit the audio signal of the conference unit to the host.

3. The repeater applied to the wired intelligent conference system according to claim 1, characterized in that: The signal processing unit includes: a first codec chip connected to the host interface, an MCU control chip connected to the first codec chip, and a second codec chip connected to the MCU control chip; The first codec chip is used to encode and decode the control signal transmitted by the host interface; The MCU control chip is used to perform signal enhancement processing on the control signal processed by the first codec chip and then transmit it to the second codec chip; The second codec chip is used to restore the control signal after enhanced processing by the MCU control chip and output it to the unit interface.

4. The repeater used in the wired intelligent conference system according to claim 3, characterized in that: The first codec chip and the second codec chip are the same codec chip.

5. The repeater applied to a wired intelligent conference system according to any one of claims 1 to 4, characterized in that: The power supply unit includes: a switch module, an input module, a filter processing module and a voltage reduction module; The input end of the switch module is connected to the host, the output end of the switch module is connected to the input end of the input module, the output end of the input module is connected to the input end of the filter processing module, the output end of the filter processing module is connected to the input end of the step-down module, and the output end of the step-down module is respectively connected to the unit interface and the signal processing unit.

6. The repeater used in the wired intelligent conference system according to claim 5, characterized in that: The switch module includes: a seventeenth resistor, a fourth diode and a control switch; The first end of the seventeenth resistor is connected to the host interface, the second end of the seventeenth resistor is connected to the anode of the fourth diode and the first end of the control switch, the cathode of the fourth diode and the fourth end of the control switch are connected to the host, the second end of the control switch is connected to the external power supply to access the external power signal, and the fifth end of the control switch is connected to the input end of the input module.

7. The repeater used in the wired intelligent conference system according to claim 5, characterized in that: The input module includes: a first capacitor, a second capacitor, a third capacitor and a fuse; the filtering processing module includes: a power inductor, a second diode, a fourth capacitor, a fifth capacitor, a sixth capacitor, a nineteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a first resistor, a fourth resistor, an eighth resistor, a twenty-second capacitor, a seventh resistor, a twentieth capacitor and a twenty-first capacitor; The first capacitor, the second capacitor, and the third capacitor are sequentially arranged between the output end of the switch module and the input end of the fuse, and the first capacitor, the second capacitor, and the third capacitor are connected in parallel, the output end of the fuse is respectively connected to the first end of the power inductor and the unit interface, the third end of the power inductor is grounded, the second end of the power inductor is connected to the cathode of the second inductor, the anode of the second inductor is connected to the fourth end of the power inductor, and the fourth capacitor, the fifth capacitor, the sixth capacitor, the nineteenth capacitor, the fifteenth capacitor, and the sixteenth capacitor are sequentially connected in parallel with the second diode; The first end of the first resistor is connected to the second end of the power inductor and the first end of the sixteenth capacitor, the second end of the first resistor is connected to the first end of the fourth resistor, the second end of the fourth resistor is connected to the first end of the eighth resistor and the step-down module, the second end of the eighth resistor is grounded, the first end of the twenty-second capacitor is grounded, the second end of the twenty-second capacitor is connected to the step-down module, the second end of the seventh resistor and the second end of the twenty-first capacitor are grounded, the first end of the seventh resistor is connected to the second end of the twentieth capacitor, and the first end of the twentieth capacitor and the first end of the twenty-first capacitor are connected to the step-down module.

8. The repeater used in the wired intelligent conference system according to claim 7, characterized in that: The step-down module includes: a step-down chip and its peripheral circuit; the peripheral circuit includes: a seventh capacitor, a third diode, a first inductor, a seventeenth capacitor, an eighteenth capacitor, a sixth resistor, a second resistor and a fifth resistor; The second pin of the buck chip is connected to the first end of the first resistor, the third pin of the buck chip is connected to the second end of the fourth resistor, the fourth pin of the buck chip is connected to the second end of the twenty-second capacitor, and the sixth pin of the buck chip is connected to the first end of the twenty-second capacitor and the first end of the twenty-first capacitor; The eighth pin of the buck chip is connected to the first end of the seventh capacitor and the first end of the first inductor, the first pin of the buck chip is connected to the second end of the seventh capacitor, the fifth pin of the buck chip is connected to the second end of the sixth resistor, and the seventh pin of the buck chip is grounded; the second end of the first inductor is grounded through the seventeenth capacitor, the cathode of the third diode is connected to the first end of the first inductor, the anode of the third diode is grounded, the first end of the eighteenth capacitor is connected to the second end of the first inductor, the second end of the eighteenth capacitor is connected to the first end of the sixth resistor and connected to the ground, the first end of the fifth resistor is connected to the second end of the sixth resistor, the second end of the fifth resistor is connected to the first end of the second resistor, the second end of the second resistor is connected to the second end of the first inductor, and the connecting end of the second end of the second resistor and the second end of the first inductor is connected to the signal processing unit.

9. The repeater applied to the wired intelligent conference system according to claim 3, characterized in that: The signal processing unit further includes: a power supply signal processing circuit; The power supply signal processing circuit includes: a magnetic bead, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a twentieth resistor and an LED lamp; The input end of the magnetic bead is connected to the output end of the power supply unit, the output end of the magnetic bead is connected to the first end of the 20th resistor and the first end of the eighth capacitor, the second end of the 20th resistor is connected to the anode of the LED lamp, the cathode of the LED lamp is grounded, and the second end of the eighth capacitor is grounded; The ninth capacitor, the tenth capacitor, the eleventh capacitor, the twelfth capacitor, the thirteenth capacitor and the fourteenth capacitor are sequentially connected in parallel with the eighth capacitor, and the first end of the fourteenth capacitor is respectively connected to the first codec chip, the second codec chip and the MCU control chip.

10. A wired intelligent conference system, characterized in that: include: The repeater applied to a wired intelligent conference system as described in any one of claims 1 to 9.

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