CN203233424U - Automatic switcher applied to medium wave transmitter - Google Patents
Automatic switcher applied to medium wave transmitter Download PDFInfo
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- CN203233424U CN203233424U CN201320302222XU CN201320302222U CN203233424U CN 203233424 U CN203233424 U CN 203233424U CN 201320302222X U CN201320302222X U CN 201320302222XU CN 201320302222 U CN201320302222 U CN 201320302222U CN 203233424 U CN203233424 U CN 203233424U
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Abstract
The utility model, which relates to the automatic switching technology of the medium wave transmitter, provides an automatic switcher applied to a medium wave transmitter, so that a problem that a fault can not be dealt with timely because mis-determination frequently occurs due to manual signal source switching when there is no sound during broadcasting can be solved. The provided automatic switcher comprises an optical cable electric signal monitoring circuit, a satellite electric signal monitoring circuit, a frequency modulation electric signal monitoring circuit, a carrier signal monitoring circuit, a single-chip microcomputer circuit, a relay control circuit and an indicator; monitoring signal output terminals of the optical cable electric signal monitoring circuit, the satellite electric signal monitoring circuit, the frequency modulation electric signal monitoring circuit, and the carrier signal monitoring circuit are respectively connected with an optical cable electric signal input terminal, a satellite electric signal input terminal, a frequency modulation electric signal input terminal, and a carrier signal input terminal of the single-chip microcomputer circuit; and a control signal output terminal and an indication signal output terminal of the single-chip microcomputer circuit are respectively connected with a control signal input terminal of the relay control circuit and an indication signal input terminal of the indicator. The provided automatic switcher is suitable for the filed of the control technology of transmitter working.
Description
Technical field
The utility model relates to a kind of medium wave transmitter automatic switchover technology, belongs to the control technology field of transmitter work.
Background technology
In MW Transmitting Station, the audio signal source of transmitter is divided into the optical cable signal of telecommunication, satellite electric signal and the frequency modulation signal of telecommunication three tunnel usually, and custom is referred to as circuit 1, circuit 2 and circuit 3 in order.The operator on duty is when finding to broadcast voiceless sound, at first can select the method for switching signal source to solve, if when after switching optical cable, satellite and frequency modulation three tunnel signal sources, still broadcasting voiceless sound, then can start standby transmitter work, and close master transmitter, thereby guarantee that program broadcasts without interruption.Adopt the manual switching mode owing to can be subjected to the influence of people's reaction speed, and be prone to the disconnected situation of erroneous judgement, poor reliability causes troubleshooting untimely, thereby index is broken in influence,
Summary of the invention
The purpose of this utility model is in order to solve when broadcasting voiceless sound, and it is disconnected that the manual switching signal source is prone to erroneous judgement, causes troubleshooting untimely, thereby the problem of index is broken in influence, and a kind of automatic switchover device that is applied to medium wave transmitter is provided.
A kind of automatic switchover device that is applied to medium wave transmitter described in the utility model comprises optical cable signal of telecommunication observation circuit 1, satellite electric signal observation circuit 2, frequency modulation signal of telecommunication observation circuit 3, carrier signal observation circuit 4, single chip circuit 5, control relay circuit 6 and indicating device 7, the monitor signal output of optical cable signal of telecommunication observation circuit 1 connects the optical cable electric signal input end of single chip circuit 5, the monitor signal output of satellite electric signal observation circuit 2 connects the satellite electric signal input of single chip circuit 5, the monitor signal output of frequency modulation signal of telecommunication observation circuit 3 connects the frequency modulation electric signal input end of single chip circuit 5, the monitor signal output of carrier signal observation circuit 4 connects the carrier wave electric signal input end of single chip circuit 5, the control signal output of single chip circuit 5 connects the control signal input of control relay circuit 6, control relay circuit 6 is used for realization to switching and the startup of standby transmitter and the cutting out of master transmitter of transmitter audio signal source circuit, the index signal input of the index signal output link indicator 7 of single chip circuit 5.
The optical cable signal of telecommunication observation circuit 1 of a kind of automatic switchover device that is applied to medium wave transmitter described in the utility model is by sample circuit 1-1, trap circuit 1-2, amplifying circuit 1-3, comparison circuit 1-4 and monostable flipflop 1-5 form, the sampled signal output of sample circuit 1-1 connects the signal input part of trap circuit 1-2, the signal output part of trap circuit 1-2 connects the signal input part of amplifying circuit 1-3, the signal output part of amplifying circuit 1-3 connects the signal input part of comparison circuit 1-4, the signal output part of comparison circuit 1-4 connects the signal input part of monostable flipflop 1-5, and the signal output part of monostable flipflop 1-5 is the monitor signal output of optical cable signal of telecommunication observation circuit 1.
The satellite electric signal observation circuit 2 of a kind of automatic switchover device that is applied to medium wave transmitter described in the utility model is identical with the structure of optical cable signal of telecommunication observation circuit 1.
The frequency modulation signal of telecommunication observation circuit 3 of a kind of automatic switchover device that is applied to medium wave transmitter described in the utility model is identical with the structure of optical cable signal of telecommunication observation circuit 1.
The carrier signal observation circuit 4 of a kind of automatic switchover device that is applied to medium wave transmitter described in the utility model is by sample circuit 4-1, detecting circuit 4-2, filter circuit 4-3, comparison circuit 4-4 and monostable flipflop 4-5 form, sample circuit 4-1 is used for gathering the transmitter outgoing carrier, the sampled signal output of sample circuit 4-1 connects the signal input part of detecting circuit 4-2, the signal output part of detecting circuit 4-2 connect filter circuit 4-3 signal input part, the signal output part of filter circuit 4-3 connects the signal input part of comparison circuit 4-4, the signal output part of comparison circuit 4-4 connects the signal input part of monostable flipflop 4-5, and the signal output part of monostable flipflop 4-5 is the monitor signal output of carrier signal observation circuit 4.
A kind of single chip circuit 5 that is applied to the automatic switchover device of medium wave transmitter described in the utility model adopts the chip microcontroller of AT89S51 model.
A kind of automatic switchover device that is applied to medium wave transmitter described in the utility model can be judged system failure reason according to transmitter outgoing carrier situation and three tunnel signal source testing results, and produce the corresponding actuating of relay, finish the switching of audio signal source or switch standby host work.The mistake of having avoided artificial monitoring to cause is cut off the functional reliability height.
Description of drawings
Fig. 1 is a kind of theory diagram that is applied to the automatic switchover device of medium wave transmitter described in the utility model;
Fig. 2 is the theory diagram of optical cable signal of telecommunication observation circuit;
Fig. 3 is the theory diagram of carrier signal observation circuit.
Embodiment
Embodiment one: present embodiment is described in conjunction with Fig. 1, the described a kind of medium wave transmitter automatic switchover device that is applied to of present embodiment comprises optical cable signal of telecommunication observation circuit 1, satellite electric signal observation circuit 2, frequency modulation signal of telecommunication observation circuit 3, carrier signal observation circuit 4, single chip circuit 5, control relay circuit 6 and indicating device 7, the monitor signal output of optical cable signal of telecommunication observation circuit 1 connects the optical cable electric signal input end of single chip circuit 5, the monitor signal output of satellite electric signal observation circuit 2 connects the satellite electric signal input of single chip circuit 5, the monitor signal output of frequency modulation signal of telecommunication observation circuit 3 connects the frequency modulation electric signal input end of single chip circuit 5, the monitor signal output of carrier signal observation circuit 4 connects the carrier wave electric signal input end of single chip circuit 5, the control signal output of single chip circuit 5 connects the control signal input of control relay circuit 6, control relay circuit 6 is used for realization to switching and the startup of standby transmitter and the cutting out of master transmitter of transmitter audio signal source circuit, the index signal input of the index signal output link indicator 7 of single chip circuit 5.
Optical cable signal of telecommunication observation circuit 1 is used for monitoring optical cable signal of telecommunication circuit, satellite electric signal observation circuit 2 is used for monitor satellite signal of telecommunication circuit, frequency modulation signal of telecommunication observation circuit 3 is used for monitoring frequency modulation signal of telecommunication circuit, and carrier signal observation circuit 4 is used for the outgoing carrier of monitoring transmitter.
The described a kind of medium wave transmitter automatic switchover device that is applied to of present embodiment is in actual application, the signal output part that the monitor signal input of optical cable signal of telecommunication observation circuit 1 is connected optical cable signal of telecommunication circuit, the monitor signal input of satellite electric signal observation circuit 2 connects the signal output part of satellite electric signal circuit, the monitor signal input of frequency modulation signal of telecommunication observation circuit 3 connects the signal output part of frequency modulation signal of telecommunication circuit, and the monitor signal input of carrier signal observation circuit 4 connects the carrier of transmitter signal output part.
In the MW Transmitting Station, when signal source or transmitter break down, all can cause broadcasting voiceless sound, when the signal source of circuit 1, circuit 2 and circuit 3 all just often, by control relay circuit 6 controls with the signal source of circuit 1 as transmitter; And when carrier signal observation circuit 4 monitors the outgoing carrier voiceless sound, single chip circuit 5 can be verified the monitor value of circuit 1, if circuit 1 empirical tests fault-free, illustrate that then carrier wave output voiceless sound is because transmitter failure causes, master transmitter is closed in then control relay circuit 6 control standby host work simultaneously; If circuit 1 has fault, illustrate that then circuit 1 signal source fault causes the outgoing carrier voiceless sound, then control relay circuit 6 control circuits 2 are as the signal source of transmitter; If circuit 2 is as still voiceless sound output after the signal source, then circuit switched 3 is as the signal source of transmitter; If when three circuits all open circuit or open circuit in a few road, can carry out corresponding demonstration by indicating device 7.
In addition, consider the characteristics of radio station sound programme, have of short duration pause in the program, this also meets the human speech custom, and two kinds of situations of the differentiation line broken circuit that observation circuit can be correct in the present embodiment and voice minibreak have been avoided misoperation.
In the present embodiment, single chip circuit 5 is by the state of three circuits of indicating device 7 indications, and according to the priority level of three circuits, the signal source of controlling a certain circuit by control relay circuit 6 is connected to transmitter to single chip circuit 5 simultaneously.
Embodiment two: present embodiment is described in conjunction with Fig. 2, present embodiment and execution mode one described a kind of difference that is applied to the automatic switchover device of medium wave transmitter are: described optical cable signal of telecommunication observation circuit 1 is by sample circuit 1-1, trap circuit 1-2, amplifying circuit 1-3, comparison circuit 1-4 and monostable flipflop 1-5 constitute, the sampled signal output of sample circuit 1-1 connects the signal input part of trap circuit 1-2, the signal output part of trap circuit 1-2 connects the signal input part of amplifying circuit 1-3, the signal output part of amplifying circuit 1-3 connects the signal input part of comparison circuit 1-4, the signal output part of comparison circuit 1-4 connects the signal input part of monostable flipflop 1-5, and the signal output part of monostable flipflop 1-5 is the monitor signal output of optical cable signal of telecommunication observation circuit 1.
The audio signal of the circuit of sample circuit 1-1 is gathered by transformer coupled mode; The series resonant circuit that trap circuit 1-2 adopts controllable impedance and electric capacity to constitute is realized the trap effect, interference that can a certain carrier signal of filtering; Amplifying circuit 1-3 adopts integrated operational amplifier LM324N to realize, realizes the amplification to sampled audio signal; The threshold value of the multiplication factor of amplifying circuit 1-3 and comparison circuit 1-4 need be carried out the numerical value adjustment according to the transmitting station actual environment; But monostable flipflop 1-5 is the monostable flipflop of repeated trigger, adopts LM555 to realize, can distinguish minibreak and line broken circuit situation in the voice signal.
Embodiment three: present embodiment is with execution mode one described a kind of difference that is applied to the automatic switchover device of medium wave transmitter: described satellite electric signal observation circuit 2 is identical with the structure of optical cable signal of telecommunication observation circuit 1.
Embodiment four: present embodiment is with execution mode one described a kind of difference that is applied to the automatic switchover device of medium wave transmitter: described frequency modulation signal of telecommunication observation circuit 3 is identical with the structure of optical cable signal of telecommunication observation circuit 1.
Embodiment five: present embodiment is described in conjunction with Fig. 3, present embodiment and execution mode one described a kind of difference that is applied to the automatic switchover device of medium wave transmitter are: described carrier signal observation circuit 4 is by sample circuit 4-1, detecting circuit 4-2, filter circuit 4-3, comparison circuit 4-4 and monostable flipflop 4-5 form, sample circuit 4-1 is used for gathering the transmitter outgoing carrier, the sampled signal output of sample circuit 4-1 connects the signal input part of detecting circuit 4-2, the signal output part of detecting circuit 4-2 connect filter circuit 4-3 signal input part, the signal output part of filter circuit 4-3 connects the signal input part of comparison circuit 4-4, the signal output part of comparison circuit 4-4 connects the signal input part of monostable flipflop 4-5, and the signal output part of monostable flipflop 4-5 is the monitor signal output of carrier signal observation circuit 4.
The transmitter outgoing carrier of sample circuit 4-1 signal is gathered by the capacitance partial pressure mode; Detecting circuit 4-2 adopts detector diode 2AP27 to realize, can finish detecting action, is used for obtaining exporting the audio signal of amplitude-modulated wave; Filter circuit 4-3 is low-pass filtered version, and the filtering high-frequency signal has only audio signal to pass through; Comparison circuit 4-4 compares speech signal level and particular threshold voltage, is used for exporting high level and low level, and described high level and low level have represented voice signal and voiceless sound signal respectively; But monostable flipflop 4-5 is the monostable flipflop of repeated trigger, adopts LM555 to realize.
Embodiment six: present embodiment and execution mode one described a kind of difference that is applied to the automatic switchover device of medium wave transmitter are: described single chip circuit 5 adopts the chip microcontroller of AT89S51 model.
Claims (6)
1. automatic switchover device that is applied to medium wave transmitter, it is characterized in that, it comprises optical cable signal of telecommunication observation circuit (1), satellite electric signal observation circuit (2), frequency modulation signal of telecommunication observation circuit (3), carrier signal observation circuit (4), single chip circuit (5), control relay circuit (6) and indicating device (7), the monitor signal output of optical cable signal of telecommunication observation circuit (1) connects the optical cable electric signal input end of single chip circuit (5), the monitor signal output of satellite electric signal observation circuit (2) connects the satellite electric signal input of single chip circuit (5), the monitor signal output of frequency modulation signal of telecommunication observation circuit (3) connects the frequency modulation electric signal input end of single chip circuit (5), the monitor signal output of carrier signal observation circuit (4) connects the carrier wave electric signal input end of single chip circuit (5), the control signal output of single chip circuit (5) connects the control signal input of control relay circuit (6), control relay circuit (6) is used for realization to switching and the startup of standby transmitter and the cutting out of master transmitter of transmitter audio signal source circuit, the index signal input of the index signal output link indicator (7) of single chip circuit (5).
2. a kind of automatic switchover device that is applied to medium wave transmitter according to claim 1, it is characterized in that, described optical cable signal of telecommunication observation circuit (1) is by sample circuit (1-1), trap circuit (1-2), amplifying circuit (1-3), comparison circuit (1-4) and monostable flipflop (1-5) constitute, the sampled signal output of sample circuit (1-1) connects the signal input part of trap circuit (1-2), the signal output part of trap circuit (1-2) connects the signal input part of amplifying circuit (1-3), the signal output part of amplifying circuit (1-3) connects the signal input part of comparison circuit (1-4), the signal output part of comparison circuit (1-4) connects the signal input part of monostable flipflop (1-5), and the signal output part of monostable flipflop (1-5) is the monitor signal output of optical cable signal of telecommunication observation circuit (1).
3. a kind of automatic switchover device that is applied to medium wave transmitter according to claim 1 is characterized in that, described satellite electric signal observation circuit (2) is identical with the structure of optical cable signal of telecommunication observation circuit (1).
4. a kind of automatic switchover device that is applied to medium wave transmitter according to claim 1 is characterized in that, described frequency modulation signal of telecommunication observation circuit (3) is identical with the structure of optical cable signal of telecommunication observation circuit (1).
5. a kind of automatic switchover device that is applied to medium wave transmitter according to claim 1, it is characterized in that, described carrier signal observation circuit (4) is by sample circuit (4-1), detecting circuit (4-2), filter circuit (4-3), comparison circuit (4-4) and monostable flipflop (4-5) are formed, sample circuit (4-1) is used for gathering the transmitter outgoing carrier, the sampled signal output of sample circuit (4-1) connects the signal input part of detecting circuit (4-2), the signal output part of detecting circuit (4-2) connect filter circuit (4-3) signal input part, the signal output part of filter circuit (4-3) connects the signal input part of comparison circuit (4-4), the signal output part of comparison circuit (4-4) connects the signal input part of monostable flipflop (4-5), and the signal output part of monostable flipflop (4-5) is the monitor signal output of carrier signal observation circuit (4).
6. a kind of automatic switchover device that is applied to medium wave transmitter according to claim 1 is characterized in that, described single chip circuit (5) adopts the chip microcontroller of AT89S51 model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320302222XU CN203233424U (en) | 2013-05-29 | 2013-05-29 | Automatic switcher applied to medium wave transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320302222XU CN203233424U (en) | 2013-05-29 | 2013-05-29 | Automatic switcher applied to medium wave transmitter |
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| Publication Number | Publication Date |
|---|---|
| CN203233424U true CN203233424U (en) | 2013-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320302222XU Expired - Fee Related CN203233424U (en) | 2013-05-29 | 2013-05-29 | Automatic switcher applied to medium wave transmitter |
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| Country | Link |
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| CN (1) | CN203233424U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105939178A (en) * | 2016-06-21 | 2016-09-14 | 新疆维吾尔自治区广播电影电视局节目传输中心 | System and method for input audio switching and broadcasting state monitoring of frequency modulation transmitter |
-
2013
- 2013-05-29 CN CN201320302222XU patent/CN203233424U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105939178A (en) * | 2016-06-21 | 2016-09-14 | 新疆维吾尔自治区广播电影电视局节目传输中心 | System and method for input audio switching and broadcasting state monitoring of frequency modulation transmitter |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20150529 |
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| EXPY | Termination of patent right or utility model |