Train coupling broadcast switching system

Abstract

The utility model provides a train coupling broadcast switching system, which belongs to the technical field of train broadcast equipment and comprises a leading train, a following train and a coupling control device. Each train comprises a broadcast host and a broadcast slave; the broadcast host is arranged in a train head or a train tail, the broadcast slaves are arranged in each compartment of the train, and a plurality of loudspeakers are further arranged in each compartment; the broadcast slaves of the leading train and the following train are respectively connected with respective broadcast hosts, and the broadcast slaves are connected with the loudspeakers of the same compartment; the coupling control device is arranged on the following train; the coupling control device switches the broadcast slave of the following train to be connected with the broadcast host of the leading train in the coupling process, and switches the broadcast slave of the following train to be connected with the broadcast host of the following train in the uncoupling process. According to the utility model, through the cooperation of the leading train, the following train and the coupling control device, the rapid and stable switching of the broadcasting system in the coupling process is realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to train broadcast equipment technical field, especially, it relates to a train is connected broadcast switching system. BACKGROUND

[0002] The train is connected, usually refers to two or more trains are connected together through specific connecting device such as coupler, buffer, so as to form a continuous train formation, subsequent unified control, traction or braking can be carried out.The train is connected allows train to carry out synchronization in the aspects such as electric power, signal, braking system while keeping mechanical connection, to realize the overall coordinated operation.In the process of the train is connected, it is crucial to ensure the continuity and stability of train broadcast system, so as to timely transmit information to passengers and improve the riding experience.

[0003] The traditional train broadcast system has the following problems in the process of the train is connected: on the one hand, the broadcast system of the leading train and the following train is usually unified after the train is connected is completed, and cannot be unified before the train is connected, leading to lack of guidance of the broadcast system in the process of the train is connected, and errors are prone to occur.The broadcast switching speed of the existing train broadcast system in the process of the train is connected is slow.On the other hand, when two trains are connected, the broadcast slave of the following train needs to be quickly switched to the broadcast master of the leading train to ensure the continuity of the broadcast signal.However, due to technical limitations, the switching speed of the traditional broadcast system is slow, and the switching often needs to be carried out after the train is connected operation is completed, leading to interruption of the broadcast signal and affecting the riding experience of passengers. SUMMARY

[0004] The utility model provides a train is connected broadcast switching system to at least solve the problem of slow broadcast switching before the train is connected in the prior art.

[0005] The train is connected broadcast switching system provided by the embodiment of the present application comprises a leading train, a following train and a train is connected control device;

[0006] Each train comprises a broadcast master and a broadcast slave;

[0007] The broadcast master is arranged in the interior of the train head or the train tail, and the broadcast slave is arranged in each carriage of the train, and a plurality of loudspeakers are further arranged in each carriage;

[0008] The broadcast master of the leading train is connected with the broadcast slave of the leading train, the broadcast master of the following train is connected with the broadcast slave of the following train, and the broadcast slave is connected with the loudspeakers in the same carriage;

[0009] The train is connected control device is arranged on the following train;

[0010] The coupling control device switches the broadcast slave of the following train to connect with the broadcast master of the leading train in the coupling process, and switches the broadcast slave of the following train back to connect with the broadcast master of the following train in the uncoupling process. In the scheme, the coupling control device realizes the quick switching of the broadcast system in the coupling process, ensures the continuity and stability of the broadcast signal, and improves the riding experience.

[0011] Further, one broadcast slave is arranged in each carriage of the train;

[0012] At least three loudspeakers are arranged in each carriage, which are arranged at the front end, rear end and middle part of the carriage respectively. In the preferred scheme, one broadcast slave and at least three loudspeakers are arranged in each carriage, which ensures the uniform coverage of the broadcast signal in the carriage and improves the information transmission efficiency.

[0013] Further, the leading train is further provided with a first wireless module, which is connected with the broadcast master of the leading train;

[0014] The coupling control device includes a coupling control module, a control relay and a second wireless module;

[0015] The control relay includes a control switch K1-K and a controlled coil K1-S;

[0016] The control switch K1-K includes a fixed end, a normally closed end and a normally open end;

[0017] The normally closed end of the control switch K1-K is connected with the broadcast master of the following train, the normally open end of the control switch K1-K is connected with the second wireless communication module, the fixed end of the control switch K1-K is connected with the broadcast slave of the following train, and the controlled coil K1-S is connected with the coupling control module;

[0018] In the coupling process, the coupling control module disconnects the normally closed end of the control switch K1-K by closing the controlled coil K1-S of the control relay, and closes the normally open end of the control switch K1-K, and then connects the broadcast slave of the following train to the broadcast master of the leading train through the wireless connection between the second wireless communication module and the first wireless communication module. In the preferred scheme, the coupling control device realizes the quick switching of the broadcast slave through the control relay, which improves the reliability and speed of the switching.

[0019] Further, the broadcast slaves of each train are cascaded to form a broadcast link with the broadcast master. In the preferred scheme, the broadcast slaves are connected in series, and the first broadcast slave is connected with the broadcast master to form a broadcast link through the cascading of the broadcast slaves, which simplifies the structure of the broadcast system and is convenient for maintenance and management.

[0020] Further, a signal amplifier is arranged between the two broadcast slaves in the middle of the broadcast link.

[0021] Each broadcast slave on the broadcast link is connected in parallel with a signal isolation switch;

[0022] The signal isolation switch comprises a switch one end, a switch two end and a controlled end;

[0023] The switch one end of the signal isolation switch is connected with the rear end of the front-stage broadcast slave, the switch two end of the signal isolation switch is connected with the front end of the rear-stage broadcast slave, and the controlled end of the signal isolation switch is connected with the hitching control device. In the preferred embodiment, the signal amplifier and the signal isolation switch are arranged in the broadcast link, which improves the transmission distance and the anti-interference ability of the signal and ensures the stable operation of the broadcast system.

[0024] Further, the switch one end of the signal isolation switch of the broadcast slave at the front end of the broadcast link is connected with the broadcast host, and the broadcast slave at the rear end of the broadcast link is not provided with the signal isolation switch. In the preferred embodiment, the connection mode of the signal isolation switch of the broadcast slave at both ends of the broadcast link is determined, which ensures the continuous transmission of the broadcast signal.

[0025] Further, the hitching control module comprises a hitching start button SB, a time relay and a connection to bit switch K2;

[0026] The connection to bit switch K2 is arranged at the electrical hook connection between the front train and the rear train;

[0027] The time relay comprises a time relay normally closed switch KMT-K and a time relay coil KMT-S;

[0028] The first end of the hitching start button SB is connected with the positive pole V+ of the power supply and the first end of the controlled coil K1-S of the control relay, and the second end of the hitching start button SB is connected with the first end of the time relay coil KMT-S and the first end of the time relay normally closed switch KMT-K;

[0029] The second end of the time relay coil KMT-S is connected with the negative pole V- of the power supply;

[0030] The second end of the controlled coil K1-S of the control relay is connected with the first end of the time relay normally closed switch KMT-K and the first end of the connection to bit switch K2, and the second end of the connection to bit switch K2 is connected with the negative pole V- of the power supply. In the preferred embodiment, the hitching control module realizes the automatic switching of the broadcast system through the hitching start button, the time relay and the connection to bit switch, which improves the accuracy and the automation degree of the switching.

[0031] Further, the time relay adopts the SSJ-22A type contact delay type relay. In the preferred embodiment, the coil of the time relay is immediately energized after the hitching start button is pressed through the contact delay type relay.

[0032] Further, the signal lines of the broadcast link include a control signal line and an audio signal line.

[0033] Further, the broadcast slave includes a broadcast controller and an audio processing unit;

[0034] The broadcast controller is provided with a control input interface, a control output interface, an audio input interface, a first audio output interface and a second audio output interface;

[0035] The control input interface is connected with the control output interface of the broadcast slave in the front stage through a control signal line, and the control output interface is connected with the control input interface of the broadcast slave in the rear stage through a control signal line;

[0036] The audio input interface is connected with the first audio output interface of the broadcast slave in the front stage through an audio signal line, and the first audio output interface is connected with the audio input interface of the broadcast slave in the rear stage through an audio signal line;

[0037] One end of the audio processing unit is connected with the audio input interface, the other end of the audio processing unit is connected with the second audio output interface, and the audio output interface is connected with each loudspeaker.

[0038] From the above technical solution, the utility model has the following advantages:

[0039] The train connection broadcast switching system provided in the application realizes quick and stable switching of the broadcast system in the connection process through cooperation of the leading train, the following train and the connection control device, not only ensures continuity of the broadcast signal and improves passenger riding experience, but also improves stability and reliability of the system through optimization of the structure and design of the broadcast system. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical scheme of the utility model, the following will be briefly introduced the drawings needed to be used in the description, obviously, the drawings in the following description are only some embodiments of the utility model, for the ordinary skilled in the art, under the premise of not paying the creative labor, other drawings can also be obtained according to these drawings.

[0041] Figure 1 It is a schematic view of the train connection broadcast switching system of the embodiment.

[0042] Figure 2 FIG. 1 is a schematic diagram of a train marshaling system according to an embodiment of the present disclosure.

[0043] Main reference signs

[0044] 1, leading train; 2, following train; 3, marshaling control device; 4, broadcast master; 5, broadcast slave; 6, loudspeaker; 7, marshaling control module; 8, first wireless module; 9, second wireless module. DETAILED DESCRIPTION

[0045] Various embodiments of the present disclosure will be described in detail below, and various embodiments of the present disclosure will be more fully described. The present disclosure can have various embodiments, and adjustments and changes can be made therein. However, it should be understood that there is no intention to limit various embodiments of the present disclosure to the specific embodiments disclosed herein, but the present disclosure should be understood to encompass all adjustments, equivalents, and / or alternatives falling within the spirit and scope of various embodiments of the present disclosure.

[0046] Illustratively, the marshaling operation, i.e., the process of connecting two or more trains together through specific connecting devices such as couplers, buffers, etc., to form a unified train consist, is an important means to achieve efficient train operation and flexible scheduling. During this process, the trains need to achieve synchronization of key functions such as power, signal, braking system, etc. while being mechanically connected, to ensure that the train consist can operate as a whole in coordination.

[0047] However, the traditional train broadcast system has exposed a series of problems in the marshaling operation. First, in the existing marshaling process, the broadcast systems of the leading train and the following train are often unified after the completion of the marshaling operation. This means that during the marshaling process, the broadcast system cannot provide timely guidance and information to passengers, which may cause errors or confusion in the marshaling operation due to the lack of necessary broadcast guidance.

[0048] Secondly, the switching speed of the traditional train broadcast system during the marshaling process is relatively slow. When two trains are being marshaled, in order to maintain the continuity of the broadcast signal, the broadcast slave of the following train needs to be quickly switched to the broadcast master of the leading train. However, due to technical limitations, the switching speed of the traditional broadcast system often cannot meet this demand, resulting in switching only after the completion of the marshaling operation, thereby causing interruption of the broadcast signal. This interruption not only affects the passenger's ride experience, but also may have an adverse impact on the overall operation of the train.

[0049] To solve the above problems, the embodiment provides a train continuous coupling broadcast switching system, which realizes quick switching of a broadcast system in a coupling process through cooperation of a leading train, a following train and a coupling control device, ensures continuity of a broadcast signal and improves passenger riding experience.

[0050] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0051] Please refer to Figure 1 Fig. 1 is a train continuous coupling broadcast switching system in an embodiment, which comprises a leading train 1, a following train 2 and a coupling control device 3.

[0052] Each train comprises a broadcast master 4 and a broadcast slave 5.

[0053] The broadcast master 4 is arranged inside the train head or tail, and the broadcast slave 5 is arranged in each carriage of the train, and a plurality of loudspeakers 6 are further arranged in each carriage.

[0054] The broadcast master 4 of the leading train 1 is connected with the broadcast slave 5 of the leading train 1, the broadcast master 4 of the following train 2 is connected with the broadcast slave 5 of the following train 2, and the broadcast slave 5 is connected with the loudspeaker 6 in the same carriage.

[0055] The coupling control device 3 is arranged on the following train 2.

[0056] During the coupling process, the coupling control device 3 switches the broadcast slave 5 of the following train 2 to be connected with the broadcast master 4 of the leading train 1, and during the uncoupling process, the coupling control device 3 switches the broadcast slave 5 of the following train 2 back to be connected with the broadcast master 4 of the following train 2.

[0057] It should be noted that the leading train 1 and the following train 2 are a relative concept, the leading train 1 will also become the following train 2, and the following train 2 will also become the leading train 1, that is, the train types are distinguished for convenience of description in the embodiment, and actually, the structures of the two trains are completely same.

[0058] The embodiment realizes quick switching of the broadcast system in the coupling process through the coupling control device, ensures the continuity and stability of the broadcast signal and improves the riding experience.

[0059] Further, as a refinement and extension of the above embodiment, in order to fully describe the specific implementation process in the embodiment, another train coupling broadcast switching system is provided, as shown in the figure, the system includes a leading train 1, a following train 2 and a coupling control device 3. Figure 1

[0060] Each train includes a broadcast master 4 and a broadcast slave 5.

[0061] The broadcast master 4 is arranged inside the train head or tail, and the broadcast slave 5 is arranged in each carriage of the train, and a plurality of loudspeakers 6 are also arranged in each carriage.

[0062] The broadcast master 4 of the leading train 1 is connected to the broadcast slave 5 of the leading train 1, the broadcast master 4 of the following train 2 is connected to the broadcast slave 5 of the following train 2, and the broadcast slave 5 is connected to the loudspeaker 6 in the same carriage.

[0063] The coupling control device 3 is arranged on the following train 2.

[0064] During coupling, the coupling control device 3 switches the broadcast slave 5 of the following train 2 to be connected to the broadcast master 4 of the leading train 1, and during uncoupling, the coupling control device 3 switches the broadcast slave 5 of the following train 2 back to be connected to the broadcast master 4 of the following train 2.

[0065] One broadcast slave 5 is arranged in each carriage of the train.

[0066] At least three loudspeakers 6 are arranged in each carriage, respectively at the front end, the rear end and the middle of the carriage.

[0067] It should be noted that one broadcast slave 5 and at least three loudspeakers 6 are arranged in each carriage, which ensures uniform coverage of the broadcast signal in the carriage and improves the efficiency of information transmission.

[0068] A first wireless module 8 is also arranged on the leading train 1, and the first wireless module 8 is connected to the broadcast master 4 of the leading train 1.

[0069] The coupling control device 3 includes a coupling control module 7, a control relay and a second wireless module 9.

[0070] The control relay includes control switches K1-K and controlled coils K1-S.

[0071] The control switches K1-K include fixed ends, normally closed ends and normally open ends.

[0072] ​The normally closed end of the control switch K1-K is connected with the broadcast master 4 of the following train 2, the normally open end of the control switch K1-K is connected with the second wireless communication module, the fixed end of the control switch K1-K is connected with the broadcast slave 5 of the following train 2, and the controlled coil K1-S is connected with the hitching control module 7;

[0073] During the hitching process, the hitching control module 7 closes the controlled coil K1-S of the control relay, disconnects the normally closed end of the control switch K1-K, and closes the normally open end of the control switch K1-K, so as to connect the broadcast slave 5 of the following train 2 to the broadcast master 4 of the leading train 1 through the wireless connection between the second wireless communication module 9 and the first wireless communication module 8;

[0074] It should be noted that the hitching control device 3 realizes the quick switching of the broadcast slave 5 through the control relay, and improves the reliability and speed of the switching;

[0075] The broadcast slave 5 of each train is cascaded to form a broadcast link with the broadcast master 4, that is, the broadcast slaves 5 are connected in series, and the first broadcast slave 5 is connected with the broadcast master 4;

[0076] It should be noted that, since the leading train 1 and the following train 2 are a relative concept, the control switch K1-K is arranged between the broadcast master 4 and the first broadcast slave 5 of each train, so as to be hitched with other trains;

[0077] As shown in Figure 2 The hitching control module 7 includes a hitching start button SB, a time relay and a connection to the switch K2;

[0078] The connection to the switch K2 is arranged at the electrical hook connection position of the leading train 1 and the following train 2;

[0079] The time relay includes a time relay normally closed switch KMT-K and a time relay coil KMT-S; the time relay is a contact delay type relay with a model of SSJ-22A;

[0080] The first end of the hitching start button SB is connected with the positive electrode V+ of the power supply, and is connected with the first end of the controlled coil K1-S of the control relay; the second end of the hitching start button SB is connected with the first end of the time relay coil KMT-S and the first end of the time relay normally closed switch KMT-K;

[0081] The second end of the time relay coil KMT-S is connected with the negative electrode V- of the power supply;

[0082] The second end of the time relay coil KMT-S is connected with the negative electrode V- of the power supply;

[0083] The specific working process of the embodiment is as follows:

[0084] After the coupling start button SB is pressed, the time relay coil KMT-S is powered, the timing starts, the time relay normally closed switch KMT-K still maintains the closed state, thereby the time relay normally closed switch KMT-K and the time relay coil KMT-S power the coil K1-S of the control switch, and then the switch of the broadcast slave machine 5 of the following train 2 to the broadcast master machine 4 of the leading train 1 is connected;

[0085] During the timing period of the time relay, if the connection to position switch K2 is powered, it indicates that the coupling is in place, at this time, the coil K1-S of the control switch is powered, and there is no need to be controlled by the time relay any more, the switch state of the broadcast link is maintained, if the timing period has reached and the connection to position switch K2 is still not powered, it indicates that the coupling fails, the coil K1-S of the control switch is powered off, and the broadcast slave machine 5 of the following train 2 switches back to the state controlled by the original broadcast master machine 4 of the following train 2.

[0086] Similarly, when uncoupling, the connection to position switch K2 is powered off, and the broadcast slave machine 5 of the following train 2 switches back to the state controlled by the original broadcast master machine 4 of the following train 2.

[0087] In the embodiment, a signal amplifier is arranged between the two broadcast slave machines 5 in the middle of the broadcast link;

[0088] Each broadcast slave machine 5 on the broadcast link is connected in parallel with a signal isolation switch;

[0089] The signal isolation switch comprises a switch one end, a switch two end and a controlled end;

[0090] The switch one end of the signal isolation switch is connected with the rear end of the front-stage broadcast slave machine 5, the switch two end of the signal isolation switch is connected with the front end of the rear-stage broadcast slave machine 5, and the controlled end of the signal isolation switch is connected with the coupling control device 3;

[0091] The switch one end of the signal isolation switch of the broadcast slave machine 5 at the front end of the broadcast link is connected with the broadcast master machine 4, and the broadcast slave machine 5 at the rear end of the broadcast link has no signal isolation switch;

[0092] It should be noted that the signal amplifier and the signal isolation switch arranged in the broadcast link improve the transmission distance and the anti-interference ability of the signal, ensure the stable operation of the broadcast system, isolate the fault broadcast slave machine 5 from the broadcast link through the signal isolation switch, and avoid the interruption of the broadcast signal caused by the fault of a broadcast slave machine 5 in the cascaded series broadcast link.

[0093] In the embodiment, the signal line of the broadcast link comprises a control signal line and an audio signal line;

[0094] The broadcast slave 5 comprises a broadcast controller and an audio processing unit;

[0095] The broadcast controller is provided with a control input interface, a control output interface, an audio input interface, a first audio output interface and a second audio output interface;

[0096] The control input interface is connected with the control output interface of the broadcast slave 5 in the front stage through a control signal line, and the control output interface is connected with the control input interface of the broadcast slave 5 in the rear stage through a control signal line;

[0097] The audio input interface is connected with the first audio output interface of the broadcast slave 5 in the front stage through an audio signal line, and the first audio output interface is connected with the audio input interface of the broadcast slave 5 in the rear stage through an audio signal line;

[0098] One end of the audio processing unit is connected with the audio input interface, and the other end of the audio processing unit is connected with the second audio output interface, and the audio output interface is connected with each loudspeaker 6;

[0099] It should be noted that, through independent transmission of the control signal and the audio signal, the anti-interference capability of the system is improved, the broadcast slave has independent control interface and audio interface, flexible transmission and processing of the broadcast signal are facilitated, and the expansibility and flexibility of the system are improved.

[0100] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A train coupling broadcast switching system, characterized in that, The train comprises a leading train, a following train and a coupling control device; Each train comprises a broadcast master and a broadcast slave; The broadcast master is arranged inside the head or tail of the train, and the broadcast slave is arranged in each compartment of the train, and a plurality of loudspeakers are arranged in each compartment; The broadcast master of the leading train is connected with the broadcast slave of the leading train, and the broadcast master of the following train is connected with the broadcast slave of the following train, and the broadcast slave is connected with the loudspeakers in the same compartment; The coupling control device is arranged on the following train; During coupling, the coupling control device switches the broadcast slave of the following train to be connected with the broadcast master of the leading train, and during uncoupling, the coupling control device switches the broadcast slave of the following train to be connected with the broadcast master of the following train.

2. The train consist announcement switching system of claim 1, wherein, One broadcast slave is arranged in each compartment of the train; At least three loudspeakers are arranged in each compartment, which are arranged at the front end, the rear end and the middle part of the compartment respectively.

3. The train consist broadcast switching system of claim 2, wherein, A first wireless module is further arranged on the leading train, and the first wireless module is connected with the broadcast master of the leading train; The coupling control device comprises a coupling control module, a control relay and a second wireless module; The control relay comprises a control switch K1-K and a controlled coil K1-S; The control switch K1-K comprises a fixed end, a normally closed end and a normally open end; The normally closed end of the control switch K1-K is connected with the broadcast master of the following train, the normally open end of the control switch K1-K is connected with the second wireless communication module, the fixed end of the control switch K1-K is connected with the broadcast slave of the following train, and the controlled coil K1-S is connected with the coupling control module; During coupling, the coupling control module closes the controlled coil K1-S of the control relay, disconnects the normally closed end of the control switch K1-K, and closes the normally open end of the control switch K1-K, so as to connect the broadcast slave of the following train to the broadcast master of the leading train through the wireless connection between the second wireless communication module and the first wireless communication module.

4. The train consist announcement switching system of claim 1, wherein, The broadcast slaves of each train are cascaded to form a broadcast link with the broadcast master.

5. The train consist announcement switching system of claim 4, wherein, A signal amplifier is arranged between two broadcast slaves in the middle part of the broadcast link; Each broadcast slave on the broadcast link is connected with a signal isolation switch in parallel; The signal isolation switch comprises a switch one end, a switch two end and a controlled end; The switch one end of the signal isolation switch is connected with the rear end of the preceding broadcast slave, the switch two end of the signal isolation switch is connected with the front end of the following broadcast slave, and the controlled end of the signal isolation switch is connected with the coupling control device.

6. The train consist announcement switching system of claim 5, wherein, The switch one end of the signal isolation switch of the broadcast slave at the front end of the broadcast link is connected with the broadcast master, and the broadcast slave at the rear end of the broadcast link is not provided with a signal isolation switch.

7. The train consist announcement switching system of claim 6, wherein, The coupling control module comprises a coupling start button BS, a time relay and a connection to position switch K2; The connection to position switch K2 is arranged at the electrical hook connection position of the leading train and the following train; The time relay comprises a time relay normally closed switch KMT-K and a time relay coil KMT-S; The first end of the coupling start button BS is connected with the positive electrode V+ of the power supply and the first end of the controlled coil K1-S of the control relay, and the second end of the coupling start button BS is connected with the first end of the time relay coil KMT-S and the first end of the time relay normally closed switch KMT-K. The second end of the time relay coil KMT-S is connected with the negative pole V- of the power supply; The second end of the controlled coil K1-S of the control relay is connected with the first end of the normally closed switch KMT-K of the time relay and the first end of the bit switch K2, and the second end of the bit switch K2 is connected with the negative pole V- of the power supply.

8. The train consist announcement switching system of claim 7, wherein, The time relay adopts the contact delay type relay of SSJ-22A model.

9. The train consist announcement switching system of claim 5, wherein, The signal lines of the broadcast link include control signal lines and audio signal lines.

10. The train consist announcement switching system of claim 9, wherein, The broadcast slave machine includes a broadcast controller and an audio processing unit; The broadcast controller is provided with a control input interface, a control output interface, an audio input interface, a first audio output interface and a second audio output interface; The control input interface is connected with the control output interface of the broadcast slave machine in the front stage through the control signal lines, and the control output interface is connected with the control input interface of the broadcast slave machine in the rear stage through the control signal lines; The audio input interface is connected with the first audio output interface of the broadcast slave machine in the front stage through the audio signal lines, and the first audio output interface is connected with the audio input interface of the broadcast slave machine in the rear stage through the audio signal lines; One end of the audio processing unit is connected with the audio input interface, and the other end of the audio processing unit is connected with the second audio output interface, and the audio output interface is connected with each loudspeaker.

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