EM line splitter for sharing transceiver to receive and transmit audio and control

Abstract

The utility model provides an EM line splitter for sharing audio receiving and transmitting and controlling of a transceiver, which relates to the technical field of wireless communication and comprises a transceiver EM interface, a single-pole multi-throw analog switch, a single-chip microcomputer, a first variable gain amplification assembly, a second variable gain amplification assembly and a plurality of talkback terminal EM interfaces. The transceiver EM interface and the talkback terminal EM interface are respectively provided with an audio input end, an audio output end, a PTT end and a BUSY end. The audio input end of the talkback terminal EM interface is connected with the input end of the first variable gain amplification assembly, the first variable gain amplification assembly is connected with the single-pole four-throw analog switch, and the single-pole four-throw analog switch is connected with the audio output end of the transceiver EM interface. The transceiver is simple in structure, and can communicate with a plurality of talkback terminals at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless communication, and particularly relates to an EM line splitter for sharing the audio transceiver and control of a transceiver. Background Art

[0002] It is a supporting device for a very high frequency (VHF) band transceiver, and realizes the sharing of a transceiver by multiple seat devices through automatically switching audio channels. The main function of the VHF transceiver is to realize voice and data communication, and support two-way voice and data communication between airplanes, ships and base stations. The VHF transceiver is applied to fields that require fast and reliable communication. For example, integrated security warning systems for offshore oil platforms, fishery administration monitoring and command systems, etc. all rely on the VHF communication system to realize functions such as full-time receiving of distress, emergency, safety alarms, search and rescue command communication, search and rescue coordination communication, broadcasting safety information, providing ship dynamics and daily safety management communication, etc.

[0003] Existing high-power VHF transceivers used in base stations all have expansion E&M (Ear&Mouth) interfaces. E&M includes analog audio transceiver channels and PTT and BUSY signals. Under the control of the PTT and BUSY signals, a wireless half-duplex intercom function can be realized. Since the transceiver has only one E&M interface, it is inconvenient to use as the intercom terminal needs to be passed back and forth during multi-person intercom.

[0004] Therefore, there is an urgent need for an EM line splitter for sharing the audio transceiver and control of a transceiver to solve the problem that the existing VHF transceiver has only one E&M interface, and the intercom terminal needs to be passed back and forth during multi-person intercom, which is inconvenient to use. Summary of the Utility Model

[0005] The utility model provides an EM line splitter for sharing the audio transceiver and control of a transceiver to solve the problem that the existing VHF transceiver has only one E&M interface, and the intercom terminal needs to be passed back and forth during multi-person intercom, which is inconvenient to use.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] An EM line splitter for sharing the audio transceiver and control of a transceiver includes a transceiver EM interface, a single-pole multi-throw analog switch, a single-chip microcomputer, a first variable gain amplification component, a second variable gain amplification component, and multiple intercom terminal EM interfaces;

[0008] Both the transceiver EM interface and the intercom terminal EM interface have an audio input end, an audio output end, a PTT end, and a BUSY end;

[0009] The audio input end of the EM interface of the intercom terminal is connected to the input end of the first variable gain amplification component. The first variable gain amplification component is connected to a single-pole multi-throw analog switch, and the single-pole multi-throw analog switch is connected to the audio output end of the transceiver EM interface;

[0010] The audio input end of the transceiver EM interface is connected to the input end of the second variable gain amplification component, and the output end of the second variable gain amplification component is connected to the audio input end of the intercom terminal EM interface;

[0011] The PTT end of the transceiver EM interface is connected to the single-chip microcomputer, and the PTT end of the intercom terminal EM interface is connected to the single-chip microcomputer;

[0012] The BUSY end of the transceiver EM interface is connected to the BUSY end of the intercom terminal EM interface.

[0013] Further, the single-pole multi-throw analog switch is a single-pole four-throw analog switch. There are four EM interfaces of the intercom terminal, and both the first variable gain amplification component and the second variable gain amplification component are provided with four variable gain amplifiers.

[0014] Further, the single-chip microcomputer is provided with an RS485 interface and an LED display.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows:

[0016] The structure of the present utility model is simple, and it can realize simultaneous communication between the transceiver and multiple intercom terminals, and its use is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic composition diagram of an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will describe the present utility model in detail with reference to the drawings.

[0019] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0020] In this embodiment, an EM line splitter for sharing the transceiver to receive and transmit audio and control is provided, which includes a transceiver EM interface, a single-pole multi-throw analog switch, a single-chip microcomputer, a first variable gain amplification component, a second variable gain amplification component and multiple intercom terminal EM interfaces;

[0021] Both the transceiver EM interface and the intercom terminal EM interface have an audio input terminal, an audio output terminal, a PTT terminal, and a BUSY terminal;

[0022] The audio input terminal of the intercom terminal EM interface is connected to the input terminal of the first variable gain amplification component. The first variable gain amplification component is connected to a single-pole multi-throw analog switch, and the single-pole multi-throw analog switch is connected to the audio output terminal of the transceiver EM interface;

[0023] The audio input terminal of the transceiver EM interface is connected to the input terminal of the second variable gain amplification component, and the output terminal of the second variable gain amplification component is connected to the audio input terminal of the intercom terminal EM interface;

[0024] The PTT terminal of the transceiver EM interface is connected to the single-chip microcomputer, and the PTT terminal of the intercom terminal EM interface is connected to the single-chip microcomputer;

[0025] The BUSY terminal of the transceiver EM interface is connected to the BUSY terminal of the intercom terminal EM interface.

[0026] The structure of the present utility model is simple, and it can realize the communication between the transceiver and multiple intercom terminals simultaneously, which is more convenient in actual use.

[0027] Further optimizing the above embodiment, the single-pole multi-throw analog switch is a single-pole four-throw analog switch, there are four intercom terminal EM interfaces, and both the first variable gain amplification component and the second variable gain amplification component are provided with four variable gain amplifiers.

[0028] Further optimizing the above embodiment, the single-chip microcomputer is provided with an RS485 interface and an LED display.

[0029] As Figure 1 shown, the "transceiver EM interface" in the figure is connected to a VHF transceiver, and the 4-way "intercom terminal EM interface" in the figure is connected to an intercom terminal.

[0030] The intercom terminal has two control signals: PTT and BUSY. PTT is a request call signal output by the intercom terminal. When pulled to a low level, it indicates that the call button of the intercom terminal has been pressed to request a call. BUSY is a signal for the intercom terminal to detect the status of the transceiver. When BUSY is low, it indicates that the transceiver is in the transmitting state.

[0031] The MCU (single-chip microcomputer) detects the PTT signals of the 4-way "intercom terminal E&M interface", and through an internal priority-based scheduling algorithm, determines which "intercom terminal" the upstream (red part) audio channel is switched to. The user can configure the priority of each terminal interface through RS485.

[0032] Since the transceiver and the intercom terminal may be products of different manufacturers, there is a problem of audio level mismatch. To adapt the audio level, eight variable gain amplifiers are provided in the upstream (red) and downstream (green) audio paths, and the upstream and downstream levels of each path can be separately configured through the RS485 port. The configuration data is stored in the FLASH of the single-chip microcomputer.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An EM line splitter for sharing audio and control transceiver of a transceiver, characterized in that It includes a transceiver EM interface, a single-pole multi-throw analog switch, a single-chip microcomputer, a first variable gain amplification component, a second variable gain amplification component, and multiple intercom terminal EM interfaces; Both the transceiver EM interface and the intercom terminal EM interface have an audio input terminal, an audio output terminal, a PTT terminal, and a BUSY terminal; The audio input terminal of the intercom terminal EM interface is connected to the input terminal of the first variable gain amplification component. The first variable gain amplification component is connected to the single-pole multi-throw analog switch, and the single-pole multi-throw analog switch is connected to the audio output terminal of the transceiver EM interface; The audio input terminal of the transceiver EM interface is connected to the input terminal of the second variable gain amplification component, and the output terminal of the second variable gain amplification component is connected to the audio input terminal of the intercom terminal EM interface; The PTT terminal of the transceiver EM interface is connected to the single-chip microcomputer, and the PTT terminal of the intercom terminal EM interface is connected to the single-chip microcomputer; The BUSY terminal of the transceiver EM interface is connected to the BUSY terminal of the intercom terminal EM interface.

2. The EM line splitter for sharing a transceiver to transmit and receive audio and control according to claim 1, characterized in that, The single-pole multi-throw analog switch is a single-pole four-throw analog switch. There are four intercom terminal EM interfaces, and both the first variable gain amplification component and the second variable gain amplification component are provided with four variable gain amplifiers.

3. The EM line splitter for sharing a transceiver to transmit and receive audio and control according to claim 2, wherein The single-chip microcomputer is provided with an RS485 interface and an LED display.

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