CN110649927A - Open-air type frequency modulation transmitter - Google Patents
Open-air type frequency modulation transmitter Download PDFInfo
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- CN110649927A CN110649927A CN201910821381.2A CN201910821381A CN110649927A CN 110649927 A CN110649927 A CN 110649927A CN 201910821381 A CN201910821381 A CN 201910821381A CN 110649927 A CN110649927 A CN 110649927A
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- module
- transmitter
- frequency modulation
- power supply
- audio signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/44—Arrangements characterised by circuits or components specially adapted for broadcast
- H04H20/46—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95
- H04H20/47—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems
- H04H20/48—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems for FM stereophonic broadcast systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radio Relay Systems (AREA)
- Selective Calling Equipment (AREA)
Abstract
The invention discloses a field type frequency modulation transmitter which comprises a transmitter main body, wherein the transmitter main body comprises a high-performance frequency modulation module, a switching power supply module, a main control MCU module, a radio frequency power amplifier module, an IP streaming media receiving module, a satellite receiver, a 4G router and an MP3 local playing module, and the high-performance frequency modulation module and the main control MCU module are connected with each other. The invention has the automatic switching module of the main and standby power supplies, utilizes clean energy such as solar energy and the like, reduces energy consumption, has a power failure detection module inside, can ensure that equipment can send power failure alarm information to a remote monitoring center even under the condition of power failure, and has the design of a multi-audio signal source, wherein an audio signal provided by a satellite receiver is taken as a main audio signal source, an audio signal received by an IP audio stream module is taken as a standby audio signal source, an internal plug-in card type mp3 music local playing signal is taken as an audio signal source under an emergency state, and the automatically managed audio signal is automatically switched inside the equipment to realize all-weather safe and reliable.
Description
Technical Field
The invention relates to the technical field of broadcasting equipment, in particular to a field type frequency modulation transmitter.
Background
With the continuous development of science and technology, the broadcast television business of China has been developed further, the frequency modulation broadcast signals basically cover all corners of cities and villages, but due to the unbalanced economic development of vast areas of China, a large number of remote areas do not completely cover and allocate the broadcast signals. In the past, the frequency modulation broadcast transmitter is large in size, needs a fixed machine room, and is high in construction and maintenance cost, and the coverage of frequency modulation broadcast signals at remote addresses is greatly hindered by objective factors.
Due to the improvement of domestic satellite transmission and telecommunication infrastructure, the manufacture of a field type frequency modulation transmitter becomes possible. The audio signal source of the system is from a satellite receiver and a telecommunication 4G network, the automatic switching of the audio signal is realized inside the system, no cooling fan is arranged inside the system, and the surface of the equipment is subjected to waterproof and dustproof treatment by a full radiator. The field type FM transmitter can be simply installed on telegraph poles, house roofs and other places without transmitter rooms in remote areas, so that the construction and maintenance cost of coverage of broadcast FM signals in the remote areas is greatly reduced, and conditions are provided for comprehensive coverage of the deployed broadcast signals.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a field type frequency modulation transmitter.
In order to achieve the purpose, the invention adopts the following technical scheme:
a field type frequency modulation transmitter comprises a transmitter main body, wherein the transmitter main body comprises a high-performance frequency modulation module, a switch power supply module, a main control MCU module, a radio frequency power amplifier module, an IP stream media receiving module, a satellite receiver, a 4G router and an MP3 local playing module, the high-performance frequency modulation module and the main control MCU module are mutually connected, the satellite receiver and the MP3 local playing module are both connected with the high-performance frequency modulation module through an audio signal format conversion module, the 4G router is connected with the high-performance frequency modulation module through the IP stream media receiving module and the audio signal format conversion module in sequence, the output end of the high-performance frequency modulation module is connected with the input end of the radio frequency power amplifier module, the switch power supply module provides power for the radio frequency power amplifier module, and the switch power supply module is provided with a main power supply and standby power supply input automatic switching module, and the master control MCU module is connected with the radio frequency power amplifier module, and the 4G router can remotely control and measure the master control MCU module through IP remote control.
The high-performance frequency modulation module has excellent performance indexes, the ultrahigh index of which the stereo noise ratio reaches more than 91db provides excellent signal processing capacity for the device, the high-performance frequency modulation module adopts the joint design of a field programmable gate array and a multi-order Nyquist RF digital-to-analog converter (RF DAC), and the functions of an analog quadrature modulator and a agile Local Oscillator (LO) in the analog framework modulation module are shifted to a digital domain, so that common in-phase and quadrature errors and agile local oscillator LO feed-through in an analog up-conversion circuit are eliminated.
The specific indexes of the high-performance frequency modulation module are as follows:
preferably, the main/standby power supply input automatic switching module includes a main circuit detection module and a relay switching module, the main circuit detection module is arranged on the main circuit power supply, and the relay switching module can switch the main circuit alternating current power supply to the standby circuit alternating current power supply and send power failure alarm information to the remote monitoring center.
Preferably, an external satellite antenna is arranged on the satellite receiver, and the satellite receiver can provide an analog signal to digital AES signal through an analog audio signal.
Preferably, a 3G/4G antenna is fixedly installed on the 4G router, the 4G router is further provided with a LAN1 port, a LAN2 port and a LAN3 port, the local LAN1 port from the 4G router provides an interface for the IP streaming media receiving module to use for IP audio streaming, the local LAN2 port from the 4G router provides the MCU main control module to use for remote control and telemetry, the local LAN3 port from the 4G router provides for local network connection, and local debugging parameters are modified.
Preferably, the master control MCU module can be remotely controlled through a network module, the output end of the master control MCU module is also respectively connected with the input ends controlled by the MP3 playing module, the SPI communication control frequency modulation module and the streaming media module, and the DC power supply of the master control MCU module is processed through the super capacitor power-off emergency power supply and the 12V input power supply in sequence.
Preferably, the radio frequency of the radio frequency power amplifier module is output after being processed by the preceding stage filter circuit, the preceding stage radio frequency power amplification, the subsequent stage radio frequency power amplification and the preceding stage filter circuit in sequence.
Preferably, the cover of the transmitter main body is set to be a solar panel, and the output end of the solar panel is electrically connected with the input end of the switching power supply module.
Compared with the prior art, the invention provides a field type frequency modulation transmitter, which has the following beneficial effects:
the field type frequency modulation transmitter of the invention does not need a machine room and can be independently arranged in the field, thereby greatly saving the construction and maintenance cost of the machine room of the transmitter, the device integration full radiator has no fan waterproof and dustproof design, the audio receiving device is used as the signal source of the transmitter and is arranged in the device, the device can continuously and stably work even in the full load state with severe environmental conditions, thereby greatly reducing the possibility of internal faults,
the device is provided with a main power supply and standby power supply automatic switching module, utilizes clean energy such as solar energy and the like to reduce energy consumption, is internally provided with a power failure detection module, can ensure that the device can send power failure alarm information to a remote monitoring center even under the condition of power failure,
the design of a multi-audio signal source is that an audio signal provided by a satellite receiver is used as a main audio signal source, an audio signal received by an IP audio stream module is used as a standby audio signal source, and an internal plug-in card type mp3 music local playing signal is used as an audio signal source in an emergency state, so that the three automatically managed audio signals are automatically switched inside the equipment to realize all-weather safe and reliable playing.
The high-performance frequency modulation transmitting module provides excellent user experience.
The IP remote management system realizes high-efficiency remote management and equipment fault discovery based on the 4G network.
The parts which are not related in the invention are the same as the prior art or can be realized by the prior art, and the invention has simple structure and convenient operation.
Drawings
FIG. 1 is an overall schematic view of the present invention;
FIG. 2 is a schematic structural diagram of an automatic input switching module for a main power supply and a standby power supply according to the present invention;
FIG. 3 is a schematic diagram of a satellite receiver according to the present invention;
FIG. 4 is a schematic diagram of a 4G router according to the present invention;
FIG. 5 is a schematic diagram of a master MCU module according to the present invention;
FIG. 6 is a flow chart of the RF power amplifier module of the present invention;
fig. 7 is a diagram showing a structure of a transmitter main body of the present invention.
In the figure: 1. a transmitter main body; 2. a high-performance frequency modulation module; 3. a switching power supply module; 4. a main control MCU module; 5. a radio frequency power amplifier module; 6. an audio signal format conversion module; 7. a satellite receiver; 8. an IP stream media receiving module; 9. an MP3 local play module; 10. a 4G router; 11. the main and standby power supply input automatic switching module; 12. a relay switching module; 13. an external satellite antenna; 14. a 3G/4G antenna; 15. MP3 playing module control; 16. the SPI communication controls a frequency modulation module; 17. controlling a streaming media module; 18. a solar panel; 19. and a main path detection module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
As shown in fig. 1 to 7, a field-type fm transmitter includes a transmitter main body 1, wherein: the transmitter main body 1 comprises a high-performance frequency modulation module 2, a switch power module 3, a main control MCU module 4, a radio frequency power amplifier module 5, an IP stream media receiving module 8, a satellite receiver 7, a 4G router 10 and an MP3 local playing module 9, wherein the high-performance frequency modulation module 2 is connected with the main control MCU module 4, the satellite receiver 7 and the MP3 local playing module 9 are connected with the high-performance frequency modulation module 2 through an audio signal format conversion module 6, the 4G router 10 is connected with the high-performance frequency modulation module 2 through the IP stream media receiving module 8 and the audio signal format conversion module 6 in sequence, the output end of the high-performance frequency modulation module 2 is connected with the input end of the radio frequency power amplifier module 5, the switch power module 3 provides power for the radio frequency power amplifier module 5, and the main and standby power input automatic switching module 11 is arranged on the switch power module 3, and, the master control MCU module 4 is connected with the radio frequency power amplifier module 5.
The field type frequency modulation transmitter does not need a machine room and can be independently installed in the field, so that the construction and maintenance cost of the machine room of the transmitter is greatly saved, the device is integrated, the radiator is in a fan-free waterproof and dustproof design, the audio receiving device is used as a signal source of the transmitter and is installed in the device, the device can continuously and stably work even in a full-load state with severe environmental conditions, and the possibility of internal faults is greatly reduced;
the main and standby power input automatic switching module 11 comprises a main circuit detection module 19 and a relay switching module 12, the main circuit detection module 19 is arranged on main circuit power supply, and the relay switching module 12 can switch a main circuit alternating current power supply to a standby circuit alternating current power supply and send power failure alarm information to a remote monitoring center;
the main/standby power input automatic switching module 11 uses an independent main/standby alternating current power detection switching module, when the module works in the main circuit, the module detects the alternating current input of the main circuit in real time, and immediately switches to the standby alternating current power input circuit when the main alternating current power input circuit is in a power failure or low power state, and if the module works in the standby circuit, the module switches back to the main circuit to work after the power supply of the main circuit is recovered. The stable operation greatly reduces the possibility of internal failure.
The cover of the transmitter body 1 is set to be a solar cell panel 18, and the output end of the solar cell panel 18 is electrically connected with the input end of the switching power supply module 3.
The intelligent power failure monitoring system has an automatic main power supply and standby power supply switching module, clean energy such as solar energy is utilized, energy consumption is reduced, a large-capacity super capacitor is arranged in the intelligent power failure monitoring system, and a power failure detection module can ensure that equipment can send power failure alarm information to a remote monitoring center even under the power failure condition.
The satellite receiver 7 is provided with an external satellite antenna 13, the satellite receiver 7 can provide an analog signal to digital AES signal through an analog audio signal, and the 4G router 10 can realize high-efficiency remote management and equipment fault discovery based on a 4G network through the IP remote control and remote measurement main control MCU module 4 and an IP remote management system.
The 4G router 10 is fixedly provided with a 3G/4G antenna 14, the 4G router 10 is further provided with a LAN1 port, a LAN2 port and a LAN3 port, a local LAN1 port from the 4G router 10 provides an interface for an IP streaming media receiving module to be used for IP audio streaming, a local LAN2 port from the 4G router 10 provides an MCU main control module to be used for remote control and remote measurement, a local LAN3 port from the 4G router 10 is used for local network connection, and local debugging parameters are modified.
The master control MCU module 4 can be remotely controlled through a network module, the output end of the master control MCU module 4 is also respectively connected with the input ends of an MP3 playing module control 15, an SPI communication control frequency modulation module 16 and a streaming media module control 17, and the DC power supply of the master control MCU module 4 is processed through super capacitor power-off emergency power supply and 12V input power supply in sequence.
The design of a multi-audio signal source is that an audio signal provided by a satellite receiver is used as a main audio signal source, an audio signal received by an IP audio stream module is used as a standby audio signal source, and an internal plug-in card type mp3 music local playing signal is used as an audio signal source in an emergency state, so that the three automatically managed audio signals are automatically switched inside the equipment to realize all-weather safe and reliable playing.
The radio frequency of the radio frequency power amplification module 5 sequentially passes through the front stage filter circuit, the front stage radio frequency power amplification, the rear stage radio frequency power amplification and the front stage filter circuit for processing and then outputting the radio frequency, and the high-performance frequency modulation emission module provides excellent user experience.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (7)
1. The utility model provides a field type frequency modulation transmitter, includes the transmitter main part, its characterized in that: the transmitter main body comprises a high-performance frequency modulation module, a switch power supply module, a main control MCU module, a radio frequency power amplifier module, an IP stream media receiving module, a satellite receiver, a 4G router and an MP3 local playing module, wherein the high-performance frequency modulation module is connected with the main control MCU module, the satellite receiver and the MP3 local playing module are both connected with the high-performance frequency modulation module through an audio signal format conversion module, the 4G router is connected with the high-performance frequency modulation module through the IP stream media receiving module and the audio signal format conversion module in sequence, the output end of the high-performance frequency modulation module is connected with the input end of the radio frequency power amplifier module, the switch power supply module provides power for the radio frequency power amplifier module, the main and standby power supply input automatic switching module is arranged on the switch power supply module, and the main control MCU module is connected with the radio frequency power amplifier module, the 4G router can remotely control and monitor the MCU module through IP.
2. The wild-type FM transmitter of claim 1, wherein: the main and standby power supply input automatic switching module comprises a main circuit detection module and a relay switching module, the main circuit detection module is arranged on main circuit power supply, and the relay switching module can switch a main circuit alternating current power supply to a standby circuit alternating current power supply and send power failure alarm information to a remote monitoring center.
3. The wild-type FM transmitter of claim 1, wherein: an external satellite antenna is arranged on the satellite receiver, and the satellite receiver can provide an analog signal to digital AES signal through an analog audio signal.
4. The wild-type FM transmitter of claim 1, wherein: fixed mounting has the 3G 4G antenna on the 4G router, still be provided with LAN1 mouth, LAN2 mouth and LAN3 mouth on the 4G router, the interface that IP streaming media receiving module is used for the IP audio stream is given to local LAN1 mouth that the 4G router came out, local LAN2 mouth that the 4G router came out is given MCU host control module and is used for remote control telemetering measurement, local LAN3 mouth that the 4G router came out is used for local network connection, and local debugging parameter is modified.
5. The wild-type FM transmitter of claim 1, wherein: the system comprises a master control MCU module, a MP3 playing module, an SPI communication control frequency modulation module and a streaming media module, wherein the master control MCU module can be remotely controlled through a network module, the output end of the master control MCU module is also connected with the input ends of the MP3 playing module control, the SPI communication control frequency modulation module and the streaming media module control respectively, and the DC power supply of the master control MCU module is processed through a super capacitor power-off emergency power supply and.
6. The wild-type FM transmitter of claim 1, wherein: and the radio frequency of the radio frequency power amplification module is output after being processed by the preceding stage filter circuit, the preceding stage radio frequency power amplification, the subsequent stage radio frequency power amplification and the preceding stage filter circuit in sequence.
7. The wild-type FM transmitter of claim 1, wherein: the cover of transmitter main part sets up to solar cell panel, solar cell panel output and switching power supply module's input electric connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910821381.2A CN110649927A (en) | 2019-09-02 | 2019-09-02 | Open-air type frequency modulation transmitter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910821381.2A CN110649927A (en) | 2019-09-02 | 2019-09-02 | Open-air type frequency modulation transmitter |
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| CN110649927A true CN110649927A (en) | 2020-01-03 |
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| CN201910821381.2A Pending CN110649927A (en) | 2019-09-02 | 2019-09-02 | Open-air type frequency modulation transmitter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112688748A (en) * | 2020-12-31 | 2021-04-20 | 上海东方明珠传输有限公司 | Audio transmission system and method |
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| CN204886984U (en) * | 2015-08-07 | 2015-12-16 | 马玉新 | FM transmitter |
| CN106301637A (en) * | 2015-06-09 | 2017-01-04 | 广州辉群智能科技有限公司 | Many net unification multifunctional digital emergent broadcast machines |
| CN210867655U (en) * | 2019-09-02 | 2020-06-26 | 杭州众传数字设备有限公司 | Open-air type frequency modulation transmitter |
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2019
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| CN202059423U (en) * | 2011-03-07 | 2011-11-30 | 浙江传媒学院 | Intelligent monitoring frequency modulation broadcast emitter |
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| CN112688748A (en) * | 2020-12-31 | 2021-04-20 | 上海东方明珠传输有限公司 | Audio transmission system and method |
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Application publication date: 20200103 |