CN210781072U - Multi-frequency medium wave broadcast transmitting system - Google Patents
Multi-frequency medium wave broadcast transmitting system Download PDFInfo
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- CN210781072U CN210781072U CN201921784433.5U CN201921784433U CN210781072U CN 210781072 U CN210781072 U CN 210781072U CN 201921784433 U CN201921784433 U CN 201921784433U CN 210781072 U CN210781072 U CN 210781072U
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Abstract
The utility model discloses a ripples broadcast transmitting system in multifrequency, include: control room control box, computer lab control box, transmitting antenna, a plurality of coaxial control box, the transmitter that corresponds different frequency, the network is transferred in the antenna feed, coaxial switch, wherein: the control room control box is electrically connected with the machine room control box, the machine room control box is respectively electrically connected with a plurality of coaxial control boxes with different frequencies and a plurality of transmitters with different frequencies, each transmitter is electrically connected with a corresponding antenna feed adjusting network and a coaxial switch, each coaxial control box is respectively electrically connected with a corresponding coaxial switch, and the coaxial switches are electrically connected with the transmitting antennas in parallel. The multi-frequency medium wave broadcast transmitting system can use one transmitting antenna to transmit and play different medium wave frequencies, and can realize the transmission and play of the frequencies only by pressing a button of the corresponding frequency on a control box of a control room, and the operation is simple and quick.
Description
Technical Field
The utility model relates to a medium wave broadcasting communication technology field, more specifically relates to a multi-frequency medium wave broadcasting transmitting system.
Background
With the rapid development of the broadcast television industry, the original working mode begins to show shortcomings. Generally, in order to achieve the best transmission effect and larger transmission power, some parameters of the transmitting antenna, such as the directional coefficient, effective height, impedance, etc., must be adjusted according to the transmitting frequency. Thus, in the general case, one antenna tower is used for transmission play-out of only 1 to 2 frequencies.
In order to meet the demand of people for more and more abundant cultural life, a television station needs to transmit medium wave broadcast by using a plurality of different frequencies. The television station needs to use eight broadcasting frequencies to transmit the medium wave broadcast, the frequency span is from 540KHz to 1422KHz, the prior art is difficult to meet the requirement, and the medium wave broadcast transmission of different frequencies is realized on one antenna.
Disclosure of Invention
The utility model provides a multifrequency medium wave broadcast transmitting system can carry out the medium wave broadcast transmission of different frequencies on an antenna.
The utility model discloses a multi-frequency medium wave broadcasting transmitting system realizes through following technical scheme:
a multi-frequency medium wave broadcast transmission system comprising: control room control box, computer lab control box, the coaxial control box of a plurality of different frequencies, the transmitter of a plurality of different frequencies, the antenna of a plurality of different frequencies is fed and is transferred network, a plurality of coaxial switch and transmitting antenna, wherein:
the control room control box is electrically connected with the machine room control box,
the machine room control box is respectively and electrically connected with a plurality of coaxial control boxes with different frequencies through coaxial control signal wires and is respectively and electrically connected with a plurality of transmitters with different frequencies through transmitting control signal wires,
the transmitter of each frequency in the plurality of transmitters with different frequencies is respectively electrically connected with the antenna feed adjusting network of the corresponding frequency, the antenna feed adjusting network of the corresponding frequency is electrically connected with the corresponding coaxial switch,
each of the plurality of coaxial control boxes with different frequencies is electrically connected with a corresponding coaxial switch, each of the plurality of coaxial control boxes with different frequencies is also electrically connected with a transmitter with corresponding frequency,
a plurality of coaxial switches are electrically connected in parallel with the transmit antennas.
According to the utility model discloses an among the multifrequency medium wave broadcast transmitting system, preferably, coaxial control box, transmitter, antenna are presented and are transferred the network, and coaxial switch's number is eight.
According to the utility model discloses an among the multi-frequency medium wave broadcast transmitting system, the control room control box is provided with eight frequency switch S1-S8 and eight LED lamps, and every frequency switch corresponds with corresponding LED lamp.
According to the utility model discloses an among the multi-frequency medium wave broadcasting transmitting system, the computer lab control box includes five MC1413 chips and eight relays PL1-PL 8.
One output terminal of the first MC1413 chip is electrically connected to one input terminal of the first relay PL 1; one output terminal of the second MC1413 chip is electrically connected to one input terminal of the second relay PL 2; two output ends of the third MC1413 chip are electrically connected to one input ends of a third relay PL3 and a fourth relay PL4, respectively; an output terminal of the fourth MC1413 chip is electrically connected to an input terminal of a fifth relay PL 5; three output terminals of the fifth MC1413 chip are electrically connected to one input terminal of the sixth relay PL6, the seventh relay PL7, and the eighth relay PL8, respectively.
MC1413 is a NOT gate circuit chip.
According to the utility model discloses an among the multi-frequency medium wave broadcast transmitting system, frequency switch S1-S8 corresponds eight frequencies 540kHz, 648kHz, 792kHz, 855kHz, 990kHz, 1197kHz, 1296kHz and 1422kHz respectively.
According to the utility model discloses an among the multi-frequency medium wave broadcast transmitting system, be provided with eight buttons on the panel of control room control box, it is corresponding with frequency switch S1-S8 and LED lamp respectively.
According to the utility model discloses an among the multi-frequency medium wave broadcasting transmitting system, preferably, the transmitting power of transmitting antenna is 5 kilowatts.
According to the utility model discloses an among the multi-frequency medium wave broadcast transmitting system, the external 24V power of control room control box. The utility model discloses can reach following beneficial effect:
the multi-frequency medium wave broadcast transmitting system uses one transmitting antenna to realize the broadcast transmission of different medium wave frequencies, and the selection of the broadcast frequency can realize the broadcast of the frequency only by pressing a button of the corresponding frequency on a control box of a control room, and the operation is simple and quick. The system can be used for backup emergency broadcasting of the medium wave transmitting station, and when other antenna faults cannot be broadcasted, the multi-frequency medium wave broadcasting transmitting system can be quickly started to temporarily broadcast, so that the broadcasting stop time is reduced, and the broadcasting safety is guaranteed.
Drawings
Other features, objects and advantages of the invention will become more apparent from a reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.
Fig. 1 is the schematic diagram of the multi-frequency medium wave broadcasting transmission system of the present invention, in which 1 is a transmitting antenna, 2 is a coaxial switch, 3 is an antenna feeder network, 4 is a transmitter, 5 is a coaxial control box, 6 is a machine room control box, 7 is a control room control box, 8 is a transmitter control signal line, and 9 is a coaxial control signal line.
Fig. 2 is a schematic diagram of the structure and line connection relationship of the multi-frequency medium wave broadcasting transmission system of the present invention.
Fig. 3 is a circuit diagram of a control room control box in the multi-frequency medium wave broadcasting transmission system of the present invention.
Fig. 4 is a circuit diagram of a machine room control box in the multi-frequency medium wave broadcasting transmission system of the present invention.
Fig. 5 is a circuit diagram of a coaxial control box in the multi-frequency medium wave broadcasting transmission system of the present invention.
Detailed Description
The technical solution of the present invention is specifically described below with reference to the drawings of the specification.
The detailed features and advantages of the present invention are described in detail in the detailed description, which is sufficient for anyone skilled in the art to understand the technical content of the present invention and to implement the present invention, and the related objects and advantages of the present invention can be easily understood by those skilled in the art from the description, the claims and the accompanying drawings disclosed in the present specification.
Fig. 1 is the schematic diagram of the multi-frequency medium wave broadcasting transmission system of the present invention, in the drawing, 1 is a transmitting antenna, 2 is a coaxial switch, 3 is an antenna feeder network, 4 is a transmitter, 5 is a coaxial control box, 6 is a machine room control box, 7 is a control room control box, 8 is a transmitter control signal line, and 9 is a coaxial control signal line. Fig. 2 is a schematic diagram of the structure and line connection relationship of the multi-frequency medium wave broadcasting transmission system of the present invention. As shown in fig. 1 and 2, the present invention provides a multi-frequency medium wave broadcasting transmission system, including: the control room comprises a control room control box 7, a machine room control box 6, a plurality of coaxial control boxes 5 with different frequencies, a plurality of transmitters 4 with different frequencies, a plurality of antenna feed and tuning networks 3 with different frequencies, a plurality of coaxial switches 2 and a transmitting antenna 1. Wherein: the control room control box is electrically connected with the machine room control box; the machine room control box is respectively and electrically connected with a plurality of coaxial control boxes with different frequencies through coaxial control signal wires and is respectively and electrically connected with a plurality of transmitters with different frequencies through transmitting control signal wires; the transmitter of each frequency in the transmitters with different frequencies is respectively electrically connected with the antenna feed adjusting network with the corresponding frequency, and the antenna feed adjusting network with the corresponding frequency is electrically connected with the corresponding coaxial switch; each frequency coaxial control box in the plurality of coaxial control boxes with different frequencies is electrically connected with a corresponding coaxial switch, and each frequency coaxial control box in the plurality of coaxial control boxes with different frequencies is also electrically connected with a transmitter with corresponding frequency; a plurality of coaxial switches are electrically connected in parallel with the transmit antennas.
In the embodiment shown in fig. 1, the number of the coaxial control boxes, transmitters, antenna feed networks and coaxial switches of the multi-frequency medium wave broadcasting transmission system is eight.
The control box in the control room controls the broadcast of a certain frequency broadcast signal in the whole multi-frequency medium wave broadcast transmitting system. The control room control box is connected with the machine room control box, a starting signal output by the control room control box is sent to the machine room control box, the machine room control box controls starting of the transmitter with corresponding frequency and starting of the coaxial control box, and the coaxial control box controls action of the coaxial switch to connect the antenna feed adjusting network with the transmitting antenna with the frequency. The radio signal output by the transmitter is transmitted to the outside through the antenna feed adjusting network, the coaxial switch and the transmitting antenna.
In the whole system for transmitting multi-frequency medium wave broadcast, a transmitter, an antenna feed adjusting network and a transmitting antenna form a transmitting part of medium wave radio broadcast, and the three parts are connected together and powered on to start up so as to carry out broadcast broadcasting. The control room control box, the machine room control box and the coaxial control box form a control part of the system and determine which frequency of 8 frequencies in the system is played.
The control box is installed in the machine room control room of the broadcasting station, and buttons corresponding to different frequencies are arranged on the control box and used for operating the on-off of the transmitter with the corresponding frequency.
Fig. 3 is a circuit diagram of a control room control box in the multi-frequency medium wave broadcasting transmission system of the present invention. As shown in fig. 3, the control room control box includes eight frequency switches S1-S8, each frequency switch corresponding to a respective LED lamp, and eight LED lamps. Each frequency switch corresponds to a different frequency. In an embodiment of the invention, the eight frequencies correspond to 540kHz, 648kHz, 792kHz, 855kHz, 990kHz, 1197kHz, 1296kHz, and 1422kHz, respectively.
When a button with a certain frequency on a control room control box is pressed, a starting signal with a corresponding frequency is sent to a machine room control box, the machine room control box is provided with an interlocking circuit, the interlocking circuit ensures that only one transmitter corresponding to the frequency can be started to work, simultaneously, a coaxial switch at the outlet of an antenna feed adjusting network of the transmitter can rotate and is in a communication state, the transmitter is connected with a transmitting antenna, and a broadcast signal transmitted by the transmitter is transmitted outwards through the corresponding antenna feed adjusting network, the coaxial switch and the transmitting antenna. The coaxial control box corresponding to the transmitter outputs a coaxial control signal to the coaxial switch to enable the coaxial switch to be in a communication state.
The LED lamp is arranged in the button, and the button can be lightened when pressed down, so that the indicating function is achieved. When the button is pressed again, the transmitter is turned off, the coaxial switch disconnects the transmitter from the transmitting antenna, and the system is reset to stand by for the next starting up and broadcasting.
The working principle of the control room control box is that under the driving of an external 24V power supply, when a switch with a certain frequency is pressed, the control room control box outputs a corresponding control signal to a machine room control box in the system, and the machine room control box controls the whole system to work with the corresponding frequency.
An interlocking circuit is arranged in the machine room control box, and the interlocking circuit ensures that only one transmitter can be started at the same time and only the coaxial switch of the transmitter is in a connected state. When a transmitter with a certain frequency is broadcasting, transmitters with other frequencies are always in a power-off state, the coaxial switch cannot act, and the transmitters with other frequencies in the system cannot be started until the transmitter with the certain frequency is powered off.
The control box of the control room is also provided with a talkback and alarm bell button for realizing the functions of calling and sounding the alarm bell in the control room and providing convenience for the daily work of the launching pad.
Fig. 4 shows a circuit diagram of a machine room control box in the multi-frequency medium wave broadcasting transmission system of the present invention.
As shown in fig. 4, eight relays RL1-RL8 of respective frequencies are provided in the machine room control box, and these relays are driven by a control signal of the control room control box. When a control signal with a certain frequency is transmitted into the machine room control box, the relay with the corresponding frequency acts, and simultaneously, a coaxial control signal and a transmitter broadcasting control signal are output. The coaxial control signal is input into the coaxial control box to drive the coaxial switch to act so as to switch on the transmitting antenna; the transmitter broadcasting control signal is input into the transmitter and used for controlling the startup of the transmitter. In addition, the machine room control box also forms an indication signal, and an LED lamp on the front panel of the control room control box is lightened for indication. Besides the three control signals, the relay of the machine room control box can also be connected with a transmitter radio frequency sampling circuit for radio frequency sampling and monitoring of the corresponding frequency transmitter.
Five MC1413 chip modules are arranged in the machine room control box. The switch of the control room control box sends out 24V voltage, and the voltage is sent to the MC1413 chip module through the J1 and J2 circuit modules, the MC1413 is a NOT gate circuit chip, and the high level input is output as low level after passing through the chip. The outputs of the five MC1413 chips are connected to one end of one of the eight relays. When the chip output is low level, the other end of the relay is connected with +24V high level voltage, the relay coil loop is connected, the relay acts to connect the switch contact, and a 24V frequency control signal is output.
According to the utility model discloses coaxial control box possesses automatic control and manual control function, except can receiving the coaxial control signal of computer lab control box output, drives coaxial switch's disconnection and closure, can also be through switch manual control coaxial switch's on the front panel disconnection and closure.
Fig. 5 is a circuit diagram of a coaxial control box in the multi-frequency medium wave broadcasting transmission system according to the present invention.
The utility model discloses a multi-frequency medium wave broadcasting emission system can use a transmitting antenna to carry out the transmission of different medium wave frequencies and broadcast, and the selection of broadcasting frequency only needs to press the button of corresponding frequency on the control room control box, just can realize transmission broadcast, easy operation, the speed of this frequency. The system can be used for backup emergency broadcasting of the medium wave transmitting station, and when other antenna faults cannot be broadcasted, the multi-frequency medium wave broadcasting transmitting system can be quickly started to temporarily broadcast, so that the broadcasting stop time is reduced, and the broadcasting safety is guaranteed.
Finally, it should be noted that, although the present invention has been described with reference to the present specific embodiments, it should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that various equivalent changes or substitutions can be made without departing from the spirit of the present invention, and therefore, the changes and modifications to the above embodiments within the spirit of the present invention are all within the scope of the claims of the present invention.
Claims (10)
1. A multi-frequency medium wave broadcast transmission system, comprising: control room control box, computer lab control box, the coaxial control box of a plurality of different frequencies, the transmitter of a plurality of different frequencies, the antenna of a plurality of different frequencies is fed and is transferred network, a plurality of coaxial switch and transmitting antenna, wherein:
the control room control box is electrically connected with the machine room control box,
the machine room control box is respectively and electrically connected with a plurality of coaxial control boxes with different frequencies through coaxial control signal wires and is respectively and electrically connected with a plurality of transmitters with different frequencies through transmitting control signal wires,
the transmitter of each frequency in the plurality of transmitters with different frequencies is respectively electrically connected with the antenna feed adjusting network of the corresponding frequency, the antenna feed adjusting network of the corresponding frequency is electrically connected with the corresponding coaxial switch,
each of the plurality of coaxial control boxes with different frequencies is electrically connected with a corresponding coaxial switch, each of the plurality of coaxial control boxes with different frequencies is also electrically connected with a transmitter with corresponding frequency,
a plurality of coaxial switches are electrically connected in parallel with the transmit antennas.
2. The multi-frequency medium wave broadcast transmitting system of claim 1,
the coaxial control box, the transmitter, the antenna feed adjusting network, the number of the coaxial switches is eight.
3. The multi-frequency medium wave broadcast transmitting system of claim 2,
the control room control box is provided with eight frequency switches S1-S8 and eight LED lamps, each frequency switch corresponding to a respective LED lamp.
4. The multi-frequency medium wave broadcast transmitting system of claim 1,
the machine room control box comprises five MC1413 chips and eight relays PL1-PL 8.
5. The multi-frequency medium wave broadcast transmitting system of claim 4,
one output terminal of the first MC1413 chip is electrically connected to one input terminal of the first relay PL 1; one output terminal of the second MC1413 chip is electrically connected to one input terminal of the second relay PL 2; two output ends of the third MC1413 chip are electrically connected to one input ends of a third relay PL3 and a fourth relay PL4, respectively; an output terminal of the fourth MC1413 chip is electrically connected to an input terminal of a fifth relay PL 5; three output terminals of the fifth MC1413 chip are electrically connected to one input terminal of the sixth relay PL6, the seventh relay PL7, and the eighth relay PL8, respectively.
6. The multi-frequency medium wave broadcast transmitting system of claim 5,
MC1413 is a NOT gate circuit chip.
7. The multi-frequency medium wave broadcast transmitting system of claim 3,
the frequency switches S1-S8 correspond to eight frequencies of 540kHz, 648kHz, 792kHz, 855kHz, 990kHz, 1197kHz, 1296kHz and 1422kHz, respectively.
8. The multi-frequency medium wave broadcast transmitting system of claim 7,
eight buttons are arranged on the panel of the control room control box and respectively correspond to the frequency switches S1-S8 and the LED lamps.
9. The multi-frequency medium wave broadcast transmitting system of claim 1,
the transmitting power of the transmitting antenna is 5 kilowatts.
10. The multiple frequency medium wave broadcast transmitting system of claim 1 wherein the control room control box is externally connected to a 24V power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921784433.5U CN210781072U (en) | 2019-10-22 | 2019-10-22 | Multi-frequency medium wave broadcast transmitting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921784433.5U CN210781072U (en) | 2019-10-22 | 2019-10-22 | Multi-frequency medium wave broadcast transmitting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210781072U true CN210781072U (en) | 2020-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921784433.5U Active CN210781072U (en) | 2019-10-22 | 2019-10-22 | Multi-frequency medium wave broadcast transmitting system |
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| Country | Link |
|---|---|
| CN (1) | CN210781072U (en) |
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2019
- 2019-10-22 CN CN201921784433.5U patent/CN210781072U/en active Active
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