A single booth dual machine switching and interlocking system

Abstract

This application relates to the field of high-power long-wave transmitters, and in particular to a single kiosk dual-machine switching interlock system. The system includes a first transmitter, a second transmitter, and a tuning kiosk, and further includes: a control and drive unit, a first operation unit, a second operation unit, and a switching unit; the switching unit can maintain a communication connection between the first transmitter and the tuning kiosk or maintain a communication connection between the second transmitter and the tuning kiosk; the control and drive unit receives a first control signal to control the switching unit to disconnect the communication connection between the tuning kiosk and the first transmitter and establish a communication connection between the second transmitter and the tuning kiosk; or the control and drive unit receives a second control signal to control the switching unit to disconnect the communication connection between the tuning kiosk and the second transmitter and establish a communication connection between the first transmitter and the tuning kiosk. This application can reduce the number of connections of the lines in the tuning kiosk and simplify the lines.

Description

Technical Field

[0001] This application relates to the field of transmitter control systems, and particularly to a single booth dual - machine switching and interlocking system. Background Art

[0002] At present, high - power long - wave transmitter systems in China include two transmitters, a set of tuning systems (tuning booths), and an antenna device, that is, two machines, one booth, and one antenna.

[0003] Refer to Figure 1 , in the related art, all devices in the tuning booth need to be connected to two transmitters respectively. The transmitters are used for sampling, driving, and power supply of each device in the tuning booth. Usually, to ensure the normal operation of the tuning booth, a transmitter system is equipped with two transmitters at the same time, that is, one main transmitter and one standby transmitter. A switching switch is set in the tuning booth. Under normal operation, the main transmitter is put into operation and the standby transmitter does not work; when devices such as the excitation, power amplifier, and power supply of the main transmitter fail, through the switching switch, the standby transmitter is controlled to be put into operation and the main transmitter exits the operation, so that the tuning booth can still work normally when one transmitter fails.

[0004] However, there are many devices inside the tuning booth. The main transmitter is connected to each device in the tuning booth through cables, and the standby transmitter is also connected to each device in the tuning booth through cables. To achieve the switching of the main transmitter, two sets of connecting cables need to be set. After both the main transmitter and the standby transmitter are connected to each device in the tuning booth, the circuit is relatively complex, prone to problems, and difficult for construction and maintenance. Summary of the Invention

[0005] To simplify the connection circuit between each device in the tuning booth and the transmitter, this application provides a single booth dual - machine switching and interlocking system.

[0006] This application provides a single booth dual - machine switching and interlocking system, adopting the following technical solutions:

[0007] A single booth dual - machine switching and interlocking system includes a first transmitter, a second transmitter, and a tuning booth, and further includes:

[0008] A control and drive unit, a first operation unit, a second operation unit, and a switching unit;

[0009] The first operation unit can output a first control signal;

[0010] The second operation unit can output a second control signal;

[0011] The switching unit is connected to the tuning booth, the first transmitter, and the second transmitter;

[0012] The control and drive unit is connected to the first operation unit, the second operation unit, and the tuning booth;

[0013] The control and drive unit receives a first control signal to control the switching unit to disconnect the communication connection between the tuning booth and the first transmitter, and establish the communication connection between the second transmitter and the tuning booth;

[0014] Or the control and drive unit receives a second control signal to control the switching unit to disconnect the communication connection between the tuning booth and the second transmitter, and establish the communication connection between the first transmitter and the tuning booth.

[0015] By adopting the above technical solution, the control and drive unit can output a first control signal to control the switching unit to switch the communication connection with the tuning booth from the first transmitter to the second transmitter, and can also output a second control signal to control the switching unit to switch the communication connection with the tuning booth from the second transmitter to the first transmitter. Furthermore, by making the tuning booth only connected to the switching unit, the primary switching between the first transmitter and the second transmitter can be realized, reducing the number of connections of the lines in the tuning booth and simplifying the lines.

[0016] In a possible implementation manner, the single-booth dual-transmitter switching interlock system further includes:

[0017] A monitoring unit, disposed in the tuning booth, capable of acquiring the status information of the operation of each device in the tuning booth and outputting it to the control and drive unit;

[0018] Both the first operation unit and the second operation unit are industrial control touch screens;

[0019] The control and drive unit can receive all the status information and output it to the first operation unit and / or the second operation unit for display.

[0020] By adopting the above technical solution, the monitoring unit can acquire the status information of the operation of each device in the tuning booth and output it to the control and drive unit. The control and drive unit can output the received status information to the first operation unit and / or the second operation unit for display, and the status information of the operation of each device in the tuning booth will be displayed on the touch screen, facilitating the operator to understand the specific working status of each device in the tuning booth.

[0021] In a possible implementation manner, the control and drive unit includes:

[0022] The control and drive unit is one or more of a PLC, a single-chip microcomputer, and a CPU;

[0023] The control and drive unit can compare all the state information with preset standard state information, where the standard state information includes the state information of each device in the tuning booth during normal operation. When any of the state information does not match the corresponding standard state information, a first control signal or a second control signal is generated.

[0024] By adopting the above technical solution, the control and drive unit compares all the state information obtained by the monitoring unit with the preset standard state information, and can detect whether there is a fault in the communication system. When any state information does not match the corresponding standard state information, a first control signal or a second control signal is generated. If a fault still occurs after switching the transmitter, it indicates that there is a fault in the equipment in the tuning booth, which is convenient for maintenance personnel to find the faulty equipment and is beneficial for maintenance.

[0025] In a possible implementation manner, the single-booth dual-transmitter switching and interlocking system further includes:

[0026] A power supply unit, where the power supply unit includes a first power supply unit and a second power supply unit;

[0027] The first power supply unit is connected to the first transmitter, the control and drive unit, the second power supply unit, the first operation unit, and the tuning booth; the second power supply unit is connected to the second transmitter, the second operation unit, and the first power supply unit;

[0028] The first transmitter or the second power supply unit supplies power to the first power supply unit, and the first power supply unit supplies power to the control and drive unit, the first operation unit, and the tuning booth;

[0029] When the control and drive unit receives or generates a first control signal, the first transmitter stops supplying power to the first power supply unit, and the second power supply unit supplies power to the first power supply unit;

[0030] When the control and drive unit receives or generates a second control signal, the second power supply unit stops supplying power to the first power supply unit, and the first transmitter supplies power to the first power supply unit.

[0031] By adopting the above technical solution, when the control and drive unit receives or generates a first control signal, the first transmitter stops supplying power to the first power supply unit, and the second power supply unit supplies power to the first power supply unit, realizing the switching of the power supply unit after switching from the first transmitter as the primary to the second transmitter as the primary; when the control and drive unit receives or generates a second control signal, the second power supply unit stops supplying power to the first power supply unit, and the first transmitter supplies power to the first power supply unit, realizing the switching of the power supply unit after switching from the second transmitter as the primary to the first transmitter as the primary.

[0032] In a possible implementation manner, the switching unit includes:

[0033] A single-pole double-throw switch and a driving motor;

[0034] The first stationary terminal B of the single-pole double-throw switch is connected to the communication main circuit of the first transmitter, the second stationary terminal C of the single-pole double-throw switch is connected to the communication main circuit of the second transmitter, one end of the knife switch of the single-pole double-throw switch is A and is connected to the communication main circuit of the tuning booth, and the output shaft of the driving motor is fixed to the other end of the knife switch;

[0035] When the control and drive unit receives or generates a first control signal, the driving motor is powered on and rotates forward so that the knife switch abuts against the second stationary terminal C;

[0036] Or when the control and drive unit receives or generates a second control signal, the driving motor is powered on and rotates reversely so that the knife switch abuts against the first stationary terminal B.

[0037] By adopting the above technical solution, based on the forward and reverse rotation of the driving motor, the knife switch of the single-pole double-throw switch can abut against the first stationary terminal B or the second stationary terminal C, realizing the communication switching between the first transmitter and the second transmitter.

[0038] In a possible implementation manner, the switching unit includes:

[0039] A wireless switch, including a first wireless switch K1 and a second wireless switch K2;

[0040] When the control and drive unit receives or generates a first control signal, the first wireless switch K1 disconnects and the second wireless switch K2 closes;

[0041] Or when the control and drive unit receives or generates a second control signal, the second wireless switch K2 disconnects and the first wireless switch K1 closes.

[0042] By adopting the above technical solution, the communication switching between the first transmitter and the second transmitter is realized, and the circuit is simplified.

[0043] In a possible implementation manner, the monitoring unit includes:

[0044] The monitoring unit is a sensor and / or an electric control switch. The sensor can collect the operation parameters of the corresponding equipment in the tuning booth. After the control and drive unit receives the operation parameters, they are displayed by the first operation unit and / or the second operation unit;

[0045] Both the first operation unit and the second operation unit can output control signals corresponding to each of the electric control switches to achieve the switching of the states of each of the electric control switches.

[0046] By adopting the above technical solution, the first operation unit and / or the second operation unit can display the parameters of the corresponding devices in the tuning booth collected by the sensor on the touch screen; both the first operation unit and the second operation unit can output control signals corresponding to each of the electric control switches, facilitating the operator to switch the states of the electric control switches on the first operation unit and the second operation unit.

[0047] In summary, the present application includes at least one of the following beneficial technical effects:

[0048] 1. By adopting the above technical solution, the control and drive unit can output a first control signal to control the switching unit to switch the communication connection with the tuning booth from the first transmitter to the second transmitter, and can also output a second control signal to control the switching unit to switch the communication connection with the tuning booth from the second transmitter to the first transmitter. Furthermore, by enabling the tuning booth to be only connected to the switching unit, the primary switching between the first transmitter and the second transmitter can be achieved, reducing the number of connections of the lines in the tuning booth and simplifying the lines.

[0049] 2. The monitoring unit can obtain the status information of each device working in the tuning booth and output it to the control and drive unit. The control and drive unit can output the received status information to the first operation unit and / or the second operation unit for display, and the status information of each device working in the tuning booth will be displayed on the touch screen, facilitating the operator to understand the specific working status of each device in the tuning booth.

[0050] 3. The control and drive unit compares all the status information obtained by the monitoring unit with the preset standard status information, and can detect whether there is a fault in the communication system. When any status information does not match the corresponding standard status information, a first control signal or a second control signal is generated. If a fault still occurs after switching the transmitter, it indicates that there is a fault in the device in the tuning booth, facilitating the maintenance personnel to find the faulty device and being conducive to maintenance. Description of the Drawings

[0051] Figure 1 is a schematic diagram of the connection relationship between various devices in the related art;

[0052] Figure 2 is a schematic diagram of the connection relationship between various units in the embodiment of the present application;

[0053] Figure 3 is a schematic diagram of the structure of the monitoring unit in the embodiment of the present application;

[0054] Explanation of the accompanying drawings: 1. First transmitter; 2. Second transmitter; 3. Tuning booth; 4. Control drive unit; 5. First operating unit; 6. Second operating unit; 7. Power supply unit; 71. First power supply unit; 72. Second power supply unit; 8. Switching unit; 9. Monitoring unit. DETAILED DESCRIPTION

[0055] The following is combined with Figure 2 -Attached Figure 3 This application is described in further detail.

[0056] After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

[0057] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0058] In this document, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document, unless otherwise specified, generally indicates an "or" relationship between the related objects.

[0059] The present application embodiment provides a single booth dual machine switching interlocking system, referring to Figure 2 The system includes a first transmitter 1, a second transmitter 2 and a tuning booth 3, and also includes a control drive unit 4, a first operating unit 5, a second operating unit 6 and a switching unit 8, wherein:

[0060] a switching unit 8 connected to the tuning booth 3, the first transmitter 1 and the second transmitter 2;

[0061] a switching unit 8 capable of maintaining the communication connection between the first transmitter 1 and the tuning booth 3 or maintaining the communication connection between the second transmitter 2 and the tuning booth 3;

[0062] A control driving unit 4 connected to the first operating unit 5, the second operating unit 6 and the tuning booth 3;

[0063] The control driving unit 4 is capable of generating a first control signal or receiving the first control signal output by the first operation unit 5 to control the switching unit 8 to disconnect the communication connection between the tuning booth 3 and the first transmitter 1 and establish the communication connection between the second transmitter 2 and the tuning booth 3;

[0064] The control driving unit 4 is capable of generating a second control signal or receiving the second control signal output by the second operation unit 6 to control the switching unit 8 to disconnect the communication connection between the tuning booth 3 and the second transmitter 2 and establish the communication connection between the first transmitter 1 and the tuning booth 3.

[0065] In the related art, the lines connecting the transmitter and the tuning booth are relatively complex. One transmitter is connected to each device in the tuning booth, and the other transmitter is also connected to each device in the tuning booth. To realize the main use switching of the two transmitters, two sets of connection cables need to be set. The lines are complex and it is also difficult to construct and maintain. In the solution of the embodiment of the present application, the control driving unit 4 can output a first control signal to control the switching unit 8 to switch the communication connection with the tuning booth 3 from the first transmitter 1 to the second transmitter 2, and can also output a second control signal to control the switching unit 8 to switch the communication connection with the tuning booth 3 from the second transmitter 2 to the first transmitter 1. Furthermore, the tuning booth 3 is only connected to the switching unit 8, so that the main use switching between the first transmitter 1 and the second transmitter 2 can be realized, the number of connections of the lines in the tuning booth 3 is reduced, the lines are simplified, and the convenience of construction and maintenance is improved.

[0066] Further, referring to Figure 3 , the single-booth dual-transmitter switching and interlocking system further includes a monitoring unit 9. The monitoring unit 9 is arranged in the tuning booth 3 and can obtain the status information of each device working in the tuning booth 3 and output the obtained status information to the control driving unit 4.

[0067] In the embodiment of the present application, the monitoring unit 9 is a sensor and / or an electric control switch. The sensor can collect the operation parameters of the corresponding device in the tuning booth 3. When the control driving unit 4 receives the operation parameters, they are displayed by the first operation unit 5 and / or the second operation unit 6.

[0068] Both the first operation unit 5 and the second operation unit 6 can output the control signals corresponding to each electric control switch to realize the switching of the states of each electric control switch.

[0069] Referring to Figure 2, both the first operation unit 5 and the second operation unit 6 are industrial control touch screens, which can display the status information received by the control and drive unit 4 on the touch screen. The control and drive unit 4 communicates with the first operation unit 5 and the second operation unit 6 through a network. When the first transmitter 1 is the main one, the device status information received by the control and drive unit 4 is output to the first operation unit 5 for display. When the second transmitter 2 is the main one, the device status information received by the control and drive unit 4 is output to the second operation unit 6 for display, and can also be output to the first operation unit 5 for display, facilitating the operator to view the specific working status of each device in the tuning booth 3.

[0070] The first operation unit 5 can output a first control signal. When the operator clicks a button similar to the function of "the second transmitter 2 is the main one" on the touch screen of the first operation unit 5, the first control signal is output. The second operation unit 6 can output a second control signal. When the operator clicks a button similar to the function of "the first transmitter 1 is the main one" on the touch screen of the second operation unit 6, the second control signal is output.

[0071] The control and drive unit 4 can compare the sampled status information with the preset standard status information. The standard status information here includes the status information of each device in the tuning booth 3 during normal operation. When it is detected that any status information does not match the corresponding standard information, the control and drive unit 4 will generate a first control signal or a second control signal. When the first transmitter 1 is the main one, a first control signal is generated. When the second transmitter 2 is the main one, a second control signal is generated.

[0072] In the embodiment of the present application, the control and drive unit 4 can be one or more of a PLC, a single-chip microcomputer, and a CPU. For the specific device used by the control and drive unit 4, no specific limitation is made in the embodiment of the present application.

[0073] Specifically, referring to Figure 2 , the switching unit 8 includes a single-pole double-throw switch and a driving motor. Among them, the first fixed end B of the single-pole double-throw switch is connected to the communication main circuit of the first transmitter 1, the second fixed end C of the single-pole double-throw switch is connected to the communication main circuit of the second transmitter 2, one end A of the switch blade of the single-pole double-throw switch is connected to the communication main circuit of the tuning booth 3, and the output shaft of the driving motor is fixed to the other end of the switch blade. When the control and drive unit 4 receives or generates a first control signal, the control and drive unit 4 controls the driving motor to be energized and rotate forward, so that the switch blade abuts against the second fixed end C to realize the communication connection between the second transmitter 2 and the tuning booth 3. When the control and drive unit 4 receives or generates a second control signal, the control and drive unit 4 controls the driving motor to be energized and rotate reversely, so that the switch blade abuts against the first fixed end B to realize the communication connection between the first transmitter 1 and the tuning booth 3.

[0074] In the single kiosk dual - machine switching interlock system, if two transmitters communicate with the tuning kiosk 3 simultaneously, it will cause system disorder. In the embodiment of the present application, when the switching unit 8 is a single - pole double - throw switch and a driving motor, the tuning kiosk 3 will only communicate and connect with the first transmitter 1 or the second transmitter 2, and the first transmitter 1 and the second transmitter 2 cannot communicate and connect with the tuning kiosk 3 simultaneously, reducing the probability of system disorder.

[0075] Further, the switching unit 8 can also be a wireless switch, that is, the switching unit 8 includes a first wireless switch K1 and a second wireless switch K2. When the control driving unit 4 receives or generates a first control signal, the first wireless switch K1 disconnects, and the second wireless switch K2 closes, realizing the communication connection between the second transmitter 2 and the tuning kiosk 3; when the control driving unit 4 receives or generates a second control signal, the second wireless switch K2 disconnects, and the first wireless switch K1 closes, realizing the communication connection between the first transmitter 1 and the tuning kiosk 3.

[0076] When the switching unit 8 is a wireless switch, since no wiring is required, remote control can be performed, and it is also convenient for maintenance. Even further, through program control, the first wireless switch K1 and the second wireless switch K2 cannot be closed simultaneously, so that the tuning kiosk 3 can only communicate and connect with one of the first transmitter 1 and the second transmitter 2 at the same time.

[0077] In the embodiment of the present application, the switch used in the switching unit 8 can be a single - pole double - throw switch or a wireless switch, and the specific type of the wireless switch is not specifically limited in the embodiment of the present application.

[0078] Specifically, referring to Figure 2 , the single kiosk dual - machine switching interlock system further includes a power supply unit 7, and the power supply unit 7 includes a first power supply unit 71 and a second power supply unit 72. The first power supply unit 71 is connected to the first transmitter 1, the control driving unit 4, the first operation unit 5, and the tuning kiosk 3. When the first transmitter 1 is the main one, the first transmitter 1 supplies power to the first power supply unit 71. Usually, the reason for switching the main transmitter may be that the current transmitter is faulty, or the current transmitter needs maintenance and debugging operations. For example: when the first transmitter 1 needs maintenance or debugging, the operator should control the switch to the second transmitter 2 as the main one, but if the first transmitter 1 still supplies power to the first power supply unit 71 at this time, it may cause unstable power supply or even power outage. Therefore, in order to improve the stability of power supply, the first power supply unit 71 is also connected to the second power supply unit 72. When switching from the first transmitter 1 to the second transmitter 2 as the main one, the second power supply unit 72 should supply power to the first power supply unit 71, that is, when the control driving unit 4 receives or generates a first control signal, the first transmitter 1 stops supplying power to the first power supply unit 71, and the second power supply unit 72 supplies power to the first power supply unit 71.

[0079] Furthermore, the switching of the power supply relationship between the first transmitter 1 and the second power supply unit 72 and the first power supply unit 71 can be achieved by a contactor switch or other types of switches.

[0080] When switching from the first transmitter 1 as the primary to the second transmitter 2 as the primary, the operator manually operates on the touch screen of the first operation unit 5, causing the first operation unit 5 to output a first control signal. When the control drive unit 4 receives or generates the first control signal, the control drive unit 4 controls the power supply unit, causing the first transmitter 1 to stop supplying power to the first power supply unit 71, and the second power supply unit 72 to supply power to the first power supply unit 71. Moreover, the control drive unit 4 controls the switching unit 8 to disconnect the communication connection between the tuning booth 3 and the first transmitter 1 and establish the communication connection between the second transmitter 2 and the tuning booth 3, thus achieving the switching from the first transmitter 1 as the primary to the second transmitter 2 as the primary.

[0081] The above are only partial embodiments of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A single kiosk dual machine switching and interlocking system, comprising a first transmitter (1), a second transmitter (2) and a tuning kiosk (3), characterized in that, It further includes: a control drive unit (4), a first operation unit (5), a second operation unit (6), and a switching unit (8); the first operation unit (5) is capable of outputting a first control signal; the second operation unit (6) is capable of outputting a second control signal; the switching unit (8) is connected to the tuning booth (3), the first transmitter (1), and the second transmitter (2); the control drive unit (4) is connected to the first operation unit (5), the second operation unit (6), and the tuning booth (3); the control drive unit (4) receives the first control signal to control the switching unit (8) to disconnect the communication connection between the tuning booth (3) and the first transmitter (1), and establish the communication connection between the second transmitter (2) and the tuning booth (3); or the control drive unit (4) receives the second control signal to control the switching unit (8) to disconnect the communication connection between the tuning booth (3) and the second transmitter (2), and establish the communication connection between the first transmitter (1) and the tuning booth (3); the switching unit (8) includes: a single-pole double-throw switch and a drive motor; a first fixed terminal B of the single-pole double-throw switch is connected to the communication main circuit of the first transmitter (1), a second fixed terminal C of the single-pole double-throw switch is connected to the communication main circuit of the second transmitter (2), one end A of the knife switch of the single-pole double-throw switch is connected to the communication main circuit of the tuning booth (3), and the output shaft of the drive motor is fixed to the other end of the knife switch; when the control drive unit (4) receives or generates a first control signal, the drive motor is powered on and rotates forward to make the knife switch abut against the second fixed terminal C; or when the control drive unit (4) receives or generates a second control signal, the drive motor is powered on and rotates reversely to make the knife switch abut against the first fixed terminal B; alternatively, the switching unit (8) includes: a wireless switch including a first wireless switch K1 and a second wireless switch K2; when the control drive unit (4) receives or generates a first control signal, the first wireless switch K1 is disconnected and the second wireless switch K2 is closed; or when the control drive unit (4) receives or generates a second control signal, the second wireless switch K2 is disconnected and the first wireless switch K1 is closed.

2. The single kiosk dual machine switching interlock system according to claim 1, characterized in that, It further includes: a monitoring unit (9) arranged inside the tuning booth (3), capable of acquiring the status information of the operation of each device inside the tuning booth (3) and outputting it to the control drive unit (4); both the first operation unit (5) and the second operation unit (6) are industrial control touch screens; the control drive unit (4) can receive all the status information and output it to the first operation unit (5) and / or the second operation unit (6) for display.

3. A single-pavilion dual-machine switching and interlocking system according to claim 2, characterized in that, The monitoring unit (9) includes: The monitoring unit (9) is a sensor and / or an electrically controlled switch. The sensor can collect the operating parameters of the corresponding equipment in the tuning booth (3). After the control and drive unit (4) receives the operating parameters, it outputs them to the first operation unit (5) and / or the second operation unit (6) for display; Both the first operation unit (5) and the second operation unit (6) can output control signals corresponding to each electrically controlled switch to realize the switching of the states of each electrically controlled switch.

4. A single-pavilion dual-machine switching and interlocking system according to claim 2, characterized in that The control and drive unit (4) includes: The control and drive unit (4) is one or more of a PLC, a single-chip microcomputer, and a CPU; The control and drive unit (4) can compare all the state information with the preset standard state information. The standard state information includes the state information of each device in the tuning booth (3) during normal operation. When any state information does not match the corresponding standard state information, a first control signal or a second control signal is generated.

5. A single-pavilion dual-machine switching and interlocking system according to claim 1, characterized in that, It further includes: A power supply unit (7), and the power supply unit (7) includes a first power supply unit (71) and a second power supply unit (72); The first power supply unit (71) is connected to the first transmitter (1), the control and drive unit (4), the second power supply unit (72), the first operation unit (5), and the tuning booth (3); the second power supply unit (72) is connected to the second transmitter (2), the second operation unit (6), and the first power supply unit (71); The first transmitter (1) or the second power supply unit (72) supplies power to the first power supply unit (71), and the first power supply unit (71) supplies power to the control and drive unit (4), the first operation unit (5), and the tuning booth (3); When the control and drive unit (4) receives or generates a first control signal, the first transmitter (1) stops supplying power to the first power supply unit (71), and the second power supply unit (72) supplies power to the first power supply unit (71); When the control and drive unit (4) receives or generates a second control signal, the second power supply unit (72) stops supplying power to the first power supply unit (71), and the first transmitter (1) supplies power to the first power supply unit (71).

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