Transmitter main / standby switching circuit and switching machine

Abstract

The utility model relates to the field of audio playing switching, in particular to a transmitter main / standby switching circuit and a switching machine, which comprise a controlled power supply interface, a radio frequency control port and a switch assembly, and the controlled power supply interface is used for connecting a power supply interface of a main transmitter and is provided with a power supply switch for controlling whether the controlled power supply interface has power supply output or not; the radio frequency control port is used for being connected with a radio frequency output port of a standby transmitter and is provided with a radio frequency switch used for controlling whether the radio frequency output port connected with the radio frequency control port has radio frequency output or not. The switch assembly is connected with the power switch and the radio frequency switch at the same time, and is used for controlling the switching of the power switch and the radio frequency switch at the same time, so that at most one of the controlled power interface and the radio frequency output port of the standby transmitter has output. According to the utility model, switching between power supply of the main transmitter and radio frequency output of the standby transmitter can be realized simultaneously, only one of the main transmitter and the standby transmitter is ensured to work, same-frequency interference of the main transmitter and the standby transmitter can be prevented, and starting delay of the high-power transmitter during switching can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of audio playing switching, in particular to a transmitter main and standby switching circuit and switching machine. BACKGROUND

[0002] In the foreign language listening test in school, in order to deal with abnormal conditions, often equipped with a switching machine (switching intelligent control machine), at least two sound source equipment and at least two transmitters, at least two sound source equipment and at least two transmitters are connected on the switching machine (switching intelligent control machine) simultaneously, when the main sound source equipment fails, switch to the standby sound source equipment, when the main transmitter fails, switch to the standby transmitter, ensure that foreign language listening can be played reliably. Such as the patent with application number CN202322424145.1, patent name is playing switching circuit and playing switching intelligent control machine, which adopts this kind of scheme.

[0003] However, in the patent with application number CN202322424145.1, patent name is playing switching circuit and playing switching intelligent control machine, the main transmitter and the standby transmitter are connected with one controlled power supply interface respectively, and are connected with one sound source output interface signal respectively, after the main sound source output interface or the transmitter fails, the standby transmitter is connected with the controlled power supply interface, and the power supply of the main transmitter is disconnected, so that the standby transmitter is enabled. This way of replacing the main and standby transmitters by switching power supply is applicable for some small power transmitters, which can start instantly after being powered on. However, for some high-power transmitters, there is a delay from power-on to start after the standby transmitter is powered on, which causes an interruption in listening and affects the user experience. SUMMARY

[0004] The utility model wants to solve the technical problem of overcoming the defects of prior art, provides a kind of transmitter main and standby switching circuit, it can simultaneously realize the switching of whether the main transmitter is powered and whether the standby transmitter is powered, ensure that the main and standby transmitters only work, can prevent the main and standby same frequency interference, also can avoid the delay of high-power transmitter when switching.

[0005] To solve the above technical problems, the technical scheme of the utility model is: a transmitter main and standby switching circuit is used to switch the main transmitter and the standby transmitter, comprising:

[0006] The controlled power supply interface is used to connect the power supply interface of the main transmitter, and is provided with a power switch for controlling whether the power supply outputs or not;

[0007] A radio frequency control port is configured to connect a radio frequency output port of the standby transmitter, and is configured with a radio frequency switch for controlling whether the radio frequency output port connected thereto has radio frequency output.

[0008] A switch assembly is configured to simultaneously control the power switch and the radio frequency switch to switch, so that at most one of the controlled power interface and the radio frequency output port of the standby transmitter has output.

[0009] Further, a wiring mode of the radio frequency switch is provided, the radio frequency control port is a BNC port, and the radio frequency control port has an inner conductor pin and an outer conductor pin; the outer conductor pin is grounded, and the inner conductor pin is grounded through the radio frequency switch.

[0010] Further, a specific radio frequency switch is provided, and the radio frequency switch is a relay.

[0011] Further, a wiring mode of the power switch is provided, and the transmitter main / standby switching circuit further comprises a mains interface; and the controlled power interface is connected to the mains interface through the power switch.

[0012] Further, a specific power switch is provided, and the power switch is a relay.

[0013] Further, the switch assembly is a master control chip or a self-locking mutual exclusion switch.

[0014] Further, in order to enable the switching circuit to directly supply power to the standby transmitter, the transmitter main / standby switching circuit further comprises a direct power supply interface and a mains interface; the direct power supply interface is connected to the mains interface and is configured to connect a power supply interface of the standby transmitter.

[0015] Further, in order to enable the switching circuit to directly output an audio source to the main transmitter and the standby transmitter, the transmitter main / standby switching circuit further comprises an audio source output port configured to connect an audio source interface of the main transmitter and the standby transmitter.

[0016] Further, in order to improve the reliability of the circuit, the switch assembly and the corresponding power switch and radio frequency switch jointly form a switching assembly, and the switching assembly is configured with two sets of independent switching assemblies; the two sets of switching assemblies are powered by one power supply unit respectively, and the two power supply units are connected to the mains interface through a switching switch.

[0017] The utility model further relates to a switching machine, which comprises a transmitter main / standby switching circuit.

[0018] After the technical scheme is used, during use, the power supply interface of the main transmitter is connected to the controlled power supply interface, and the sound source interface of the main transmitter is always inputted with a sound source, the radio frequency output port of the standby transmitter is connected to the radio frequency control port, and the power supply interface of the standby transmitter is always in a powered state, and the sound source interface of the standby transmitter is always inputted with a sound source. When the main transmitter needs to work, the switch assembly simultaneously controls the power switch and the radio frequency switch to switch, so that the controlled power supply interface has a power output, and the radio frequency control port controls the radio frequency output port of the standby transmitter to have no radio frequency output, at this time, the main transmitter can work normally, although the standby transmitter is powered on and has a sound source input, but the radio frequency output port cannot output radio frequency, so it cannot work; when the main transmitter fails, the switch assembly simultaneously controls the power switch and the radio frequency switch to switch, so that the controlled power supply interface has no power output, and the radio frequency control port controls the radio frequency output port of the standby transmitter to have radio frequency output, at this time, the main transmitter is powered off and closed, and the standby transmitter is put into work because it can normally output radio frequency. This switching mode can well prevent the main and standby same frequency interference; and even for a high-power transmitter, because the standby transmitter is in a hot backup state, the power-on starting step is saved, so there is no delay, and the switching effect is better. In addition, for a small-power transmitter, it is also applicable, and the versatility is stronger. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A principle block diagram of a transmitter main and standby switching circuit provided with a switching assembly of the utility model;

[0020] Figure 2 A principle block diagram of a transmitter main and standby switching circuit provided with two switching assemblies of the utility model;

[0021] Figure 3 A circuit diagram of a radio frequency control port of the transmitter main and standby switching circuit in Figure 2

[0022] Figure 4 A wiring diagram of a controlled power supply interface and a direct power supply interface of the transmitter main and standby switching circuit in Figure 2

[0023] Figure 5 A wiring diagram of a switch assembly of the transmitter main and standby switching circuit in Figure 2

[0024] Figure 6 A wiring diagram of a power supply unit of two switching assemblies of the transmitter main and standby switching circuit in Figure 2

[0025] ​​​​In the figure, 100, main transmitter; 200, standby transmitter; 1, controlled power supply interface; 2, power supply switch; 3, radio frequency control port; 4, radio frequency switch; 5, switch assembly; 6, audio source output port; 7, mains interface; 8, direct power supply interface; 9, power supply unit; 10, switching switch. DETAILED DESCRIPTION

[0026] In order to make the content of the utility model more easily be clearly understood, the following according to specific embodiment and combining the drawings, the utility model is further detailed.

[0027] As Figures 1 to 6 Indicated, a kind of transmitter main standby switching circuit, for realizing the switching of main transmitter 100 and standby transmitter 200, include:

[0028] Controlled power supply interface 1 is used to connect the power supply interface of main transmitter 100, is equipped with power supply switch 2 for controlling whether it has power output;

[0029] Radio frequency control port 3 is used to connect the radio frequency output port of standby transmitter 200, is equipped with radio frequency switch 4 for controlling whether the radio frequency output port connected with it has radio frequency output;

[0030] Switch assembly 5 is simultaneously connected power supply switch 2 and radio frequency switch 4, for simultaneously controlling power supply switch 2 and radio frequency switch 4 switching, to make controlled power supply interface 1 and the radio frequency output port of standby transmitter 200 most one has output.

[0031] It needs to be noted that, after transmitter main standby switching circuit is put into use, main transmitter 100 is configured, its audio source interface is always in the state of having audio source input;The standby transmitter 200 is configured, its power supply interface uses in the state of being powered, its audio source interface is always in the state of having audio source input.

[0032] Specifically, when using the switching machine including the transmitter master-slave switching circuit in the embodiment, the power supply interface of the master transmitter 100 is connected to the controlled power supply interface 1, and the audio source interface of the master transmitter 100 is always connected to an audio source input (the audio source interface of the master transmitter 100 can be connected to the audio source output port 8 of the switching machine, or directly connected to the audio source output port of the audio source device, etc.), the radio frequency output port of the standby transmitter 200 is connected to the radio frequency control port 3, and the power supply interface of the standby transmitter 200 is always in a powered state (the power supply interface of the standby transmitter 200 can be connected to the direct power supply interface 8 of the switching machine, and can also be connected to the mains output port of the site), and the audio source interface of the standby transmitter 200 is always connected to an audio source input (the audio source interface of the standby transmitter 200 can be connected to the audio source output port 8 of the switching machine, or directly connected to the audio source output port of the audio source device, etc.). When the master transmitter 100 needs to work, the switch assembly 5 simultaneously controls the power switch 2 and the radio frequency switch 4 to switch, so that the controlled power supply interface 1 has a power output, and the radio frequency control port controls the radio frequency output port of the standby transmitter 200 to have no radio frequency output. At this time, the master transmitter 100 can work normally, although the standby transmitter 200 is powered on and has an audio source input, but its radio frequency output port cannot output radio frequency, so it cannot work. When the master transmitter 100 fails, the switch assembly 5 can simultaneously control the power switch 2 and the radio frequency switch 4 to switch, so that the controlled power supply interface 1 has no power output, and the radio frequency control port controls the radio frequency output port of the standby transmitter 200 to have radio frequency output. At this time, the master transmitter 100 is powered off and closed, and the standby transmitter 200 is put into work because it can normally output radio frequency. This switching mode can well prevent the master-slave same frequency interference; and even for high-power transmitters, because the standby transmitter 200 is in a hot backup state, the power-on startup step is saved, so there is no delay, and the switching effect is better. In addition, for small-power transmitters, it is also applicable, and the versatility is stronger.

[0033] Among them, the switch assembly 5 is a master control chip, which can also be a self-locking mutual exclusion switch.

[0034] Figure 5 The main control chip is shown, which controls the radio frequency switch 4 and the power switch 2 through a driving signal, and the main control chip is also configured with at least two buttons, of which two buttons are respectively a master transmitter button and a standby transmitter button.

[0035] When the main transmitter button is pressed once, the driving signal output by the master control chip controls the power switch 2 to switch so that the controlled power interface 1 has power output, and controls the radio frequency switch 4 to switch so that the radio frequency control port 3 controls the radio frequency output port of the standby transmitter 200 to have no radio frequency output; when the standby transmitter button is pressed once, the driving signal output by the master control chip controls the power switch 2 to switch so that the controlled power interface 1 has no power output, and controls the radio frequency switch 4 to switch so that the radio frequency control port 3 controls the radio frequency output port of the standby transmitter 200 to have radio frequency output.

[0036] In one embodiment, as shown in Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , the switch assembly 5 and the corresponding power switch 2 and radio frequency switch 4 together form a switching assembly, and the switching assembly is configured with two independent sets, and the two sets of switching assemblies are powered by a power supply unit 9, and the two power supply units 9 are connected to the mains interface 7 through a switching switch 10.

[0037] The switching assembly is set to two independent sets, so that the circuit has redundancy, and when one set of switching assembly fails, the other set of switching assembly can be used for control, thereby improving the use reliability of the switching machine.

[0038] As shown in Figure 6 , the power supply unit 9 mainly converts 220V AC mains into a power source suitable for the switching assembly.

[0039] In one embodiment, as shown in Figure 1 , Figure 2 and Figure 3 , the radio frequency control port 3 is a BNC port, which has an inner conductor pin and an outer conductor pin, and the outer conductor pin is grounded, and the inner conductor pin is grounded through the radio frequency switch 4. The radio frequency switch 4 can be a relay.

[0040] In the case of the switch assembly 5 being a master control chip, the driving signal output end of the master control chip can be directly connected to the coil of the relay, or can be connected to the coil of the relay through a driving circuit. By controlling the power supply of the coil of the relay, the radio frequency switch 4 is closed, so that the inner conductor pin is grounded, and the radio frequency output port of the standby transmitter 200 has no radio frequency output. In the case that the coil of the relay is not powered, the radio frequency switch 4 is open, and the radio frequency output port of the standby transmitter 200 can normally output radio frequency.

[0041] In one embodiment, as shown in Figure 1 , Figure 2 and Figure 4As shown in the figure, the transmitter master-slave switching circuit further comprises a mains interface 7, and the controlled power supply interface 1 is connected to the mains interface 7 through a power switch 2. The power switch 2 can be a relay.

[0042] As shown in the figure, the transmitter master-slave switching circuit further comprises a mains interface 7, and the controlled power supply interface 1 is connected to the mains interface 7 through a power switch 2. The power switch 2 can be a relay. Figure 4 As shown in the figure, in the case that the switch assembly 5 is a master control chip, the driving signal output end of the master control chip is connected to the coil of the relay through a driving circuit, and the coil of the relay is powered to make the power switch 2 closed, so that the controlled power supply interface 1 has power output; in the case that the coil of the relay is not powered, the power switch 2 is opened, and the main transmitter 100 has no power supply.

[0043] In one embodiment, as shown in the figures, Figure 1 , Figure 2 and Figure 4 , the transmitter master-slave switching circuit further comprises a direct power supply interface 8 and a mains interface 7, and the direct power supply interface 8 is connected to the mains interface 7 and used to connect the power supply interface of the standby transmitter 200.

[0044] In this way, the power supply interface of the standby transmitter 200 can be directly connected to the direct power supply interface 8, reducing the dependence on the site jack. Of course, the power supply interface of the standby transmitter 200 can also be directly connected to other mains jacks outside.

[0045] In one embodiment, as shown in the figures, Figure 1 and Figure 2 , the transmitter master-slave switching circuit further comprises an audio source output port used to connect the audio source interface of the main transmitter 100 and the standby transmitter 200.

[0046] In this way, the audio source signal can be conveniently provided to the main transmitter 100 and the standby transmitter 200 through the transmitter master-slave switching circuit.

[0047] A switching machine comprising the transmitter master-slave switching circuit in any of the above embodiments.

[0048] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of the claims.

Claims

1. A main-backup switching circuit of a transmitter for switching between a main transmitter (100) and a backup transmitter (200), comprising: a controlled power supply interface (1) for connecting a power supply interface of the main transmitter (100) and configured with a power switch (2) for controlling whether the power supply interface has a power output; a radio frequency control port (3) for connecting a radio frequency output port of the backup transmitter (200) and configured with a radio frequency switch (4) for controlling whether the radio frequency output port has a radio frequency output; and a switch assembly (5) connected to both the power switch (2) and the radio frequency switch (4) for simultaneously controlling the power switch (2) and the radio frequency switch (4) to switch so that at most one of the controlled power supply interface (1) and the radio frequency output port of the backup transmitter (200) has an output.

2. The main-backup switching circuit of a transmitter according to claim 1, wherein the radio frequency control port (3) is a BNC port having an inner conductor pin and an outer conductor pin, the outer conductor pin is grounded, and the inner conductor pin is grounded through the radio frequency switch (4).

3. The main-backup switching circuit of a transmitter according to claim 2, wherein the radio frequency switch (4) is a relay.

4. The main-backup switching circuit of a transmitter according to claim 1, further comprising a mains power supply interface (7), and the controlled power supply interface (1) is connected to the mains power supply interface (7) through the power switch (2).

5. The main-backup switching circuit of a transmitter according to claim 4, wherein the power switch (2) is a relay.

6. The main-backup switching circuit of a transmitter according to any one of claims 1-5, wherein the switch assembly (5) is a master control chip or a self-locking mutual exclusion switch.

7. The main-backup switching circuit of a transmitter according to claim 1, further comprising a direct power supply interface (8) and a mains power supply interface (7), and the direct power supply interface (8) is connected to the mains power supply interface (7) for connecting a power supply interface of the backup transmitter (200).

8. The main-backup switching circuit of a transmitter according to claim 1, further comprising a sound source output port for connecting sound source interfaces of the main transmitter (100) and the backup transmitter (200).

9. The main-backup switching circuit of a transmitter according to claim 1, wherein the switch assembly (5) and the corresponding power switch (2) and radio frequency switch (4) together form a switching assembly, the switching assembly is configured with two independent sets, the two sets of switching assemblies are powered by one power supply unit (9) respectively, and the two power supply units (9) are connected to the mains power supply interface (7) through a switching switch (10).

10. A switching machine, comprising the main-backup switching circuit of a transmitter according to any one of claims 1-9. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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