CN208316856U - Audio-video signal automatic switchover device - Google Patents
Audio-video signal automatic switchover device Download PDFInfo
- Publication number
- CN208316856U CN208316856U CN201820697300.3U CN201820697300U CN208316856U CN 208316856 U CN208316856 U CN 208316856U CN 201820697300 U CN201820697300 U CN 201820697300U CN 208316856 U CN208316856 U CN 208316856U
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- China
- Prior art keywords
- voice
- signal source
- control circuit
- frequency relay
- output
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Abstract
The utility model discloses a kind of audio-video signal automatic switchover device, is mainly made of control circuit U1, input and output terminal and voice-frequency relay relay1, relay2, and control circuit includes single-chip microcontroller, charactron, key；Input and output terminal includes active and standby signal source and output end；Active and standby signal source is separately connected voice-frequency relay, and the audio input end of active and standby signal source is linked into the end A1-T and A2-T of control circuit U1；The output control terminal of U1 is separately connected voice-frequency relay, and single-chip microcontroller controls voice-frequency relay by cont1 and cont2 and selects the output of normal signal source in U1.The utility model uses audio signal automatic switchover device, interrupts within master source continuous 20~30 seconds or when insufficient amplitude, then automatically switches to space signal source；Do not change characteristics of signals with relay switching, as the control circuit of detection status input signal, normal signal source can be automatically selected, guarantees normal broadcast.
Description
Technical field
The utility model relates to electronic information technologies and field of automation technology, are particularly suitable for the broadcast system of radio relay broadcasting station
The audio-video signal automatic switchover device of system.
Background technique
Existing radio station, TV station, radio relay broadcasting station broadcast system audio-video signal automatic switching apparatus be manual switching behaviour
Make, due to being influenced by factors such as equipment fault, weather or human errors, signal source is caused to decline or interrupt and then cause to stop
Accident is broadcast, each radio station, TV station, relay station etc. are equipped with active and standby signal source thus, during program broadcasts, in signal
Manual switching is needed when disconnected, it is not only time-consuming and laborious, but also cannot be guaranteed uninterrupted broadcast.In order to guarantee safe broadcast, mitigate minder
The labor intensity of member shortens off-air time, designs a kind of sound view of at low cost, easy to operate and suitable radio and television station application
Frequency switching equipment is very necessary and professional electronics technical staff expected always.
Utility model content
The purpose of the utility model is to overcome defects of the existing technology, provide one kind and do not change characteristics of signals, work
Reliable and stable, the simple audiovideo switcher of structure.
The utility model aim is achieved through the following technical solutions: a kind of audio-video signal automatic switchover device, mainly by controlling
Circuit U 1, input and output terminal and voice-frequency relay composition processed, it is characterised in that: the control circuit U1 includes single-chip microcontroller
U2, U3, U4, charactron SEG7-1, SEG7-2, key K1~7；The input and output terminal includes master source A1, V1, standby
Signal source A2, V2 and output end V-m, A-m, A signal1, Asignal2, the voice-frequency relay is by relay1, relay2
Composition；Master source A1, V1, standby signal source A2, V2 are separately connected voice-frequency relay relay1 and relay2, active and standby signal source
In audio input end A1, A2 be linked into the end A1-T and A2-T of control circuit U1；The output control terminal cont1 of control circuit U1
It is separately connected voice-frequency relay relay1 and relay2 with cont2, the single-chip microcontroller in control circuit U1 passes through output control terminal
Cont1 and cont2 control voice-frequency relay relay1 and relay2 selection normal signal source output.
Master source A1, V1,1 foot of standby signal source A2, V2 be separately connected voice-frequency relay relay1 and
5,6,7,8 feet of relay2, the output control terminal cont1 and cont2 of control circuit U1 are connected respectively to voice-frequency relay
2 feet of relay1 and relay2,3,4 feet through relay1 are linked into output end V-m, A-m, Asignal1, Asignal2.
The utility model uses audio signal automatic switchover device, interruption in master source continuous 20~30 seconds or insufficient amplitude
When, then automatically switch to space signal source.This equipment is switched over using relay, and advantage is not change the characteristic of signal；Make
For the control circuit for detecting status input signal, normal signal source can be automatically selected, to guarantee normal broadcast；The equipment
Reliable and stable work, suitable for radio station, TV station, the broadcast system use for relaying the station.
Detailed description of the invention
Fig. 1 is the circuit structure block diagram of the utility model.
Fig. 2 is the utility model circuit diagram.
Specific embodiment
As shown in Figure 1, the utility model audio-video signal automatic switchover device is mainly by input and output terminal, voice-frequency relay
And control circuit U1 composition, control circuit U1 includes single-chip microcontroller U2 (atmega8), U3, U4 (74ls164), charactron SEG7-
1, SEG7-2, key K1~7；Input and output terminal by lotus type socket A1, V1, A2, V2, V-m, A-m, A signal1,
Asignal2 composition；Voice-frequency relay is made of relay1, relay2；Outside source in Fig. 1 be respectively master source and
Standby signal source, is separately input to connection terminal A1, V1, A2, V2 of equipment, 1 foot of these terminals is connected respectively to audio relay
5,6,7,8 feet of device relay1, relay2 connect respectively as input terminal, i.e. master source A1, V1,1 foot of standby signal source A2, V2
Connect 5,6,7,8 feet of voice-frequency relay relay1 and relay2, the audio and video of active and standby signal source through terminal A1, V1, A2,
V2 input, 1 foot of these terminals are respectively connected to voice-frequency relay relay1, relay2, and 3,4 feet of voice-frequency relay connect respectively
Output end V-m, A-m, A signal1, Asignal2 are met, audio input end A1, A2 in active and standby signal source are linked into control electricity
Terminal A1-T, A2-T of road U1 is used for the amplitude of sensed signal sources, wherein monitoring and prison of V-m, the A-m of output end for signal
Depending on facilitating signal to debug and be arranged.Control circuit U1 is connected respectively to audio relay by output control terminal cont1 and cont2
2 feet of device relay1 and relay2, by the state of control circuit U1 detection input signal, to select normal signal source to export,
3,4 feet of voice-frequency relay relay1 are linked into output end V-m, A-m, Asignal1, Asignal2,3,4 feet through relay1
V-m, A-m are output to for monitoring, monitoring, while 3 through relay2,4 feet are output to Asignal1 and A signal2 for broadcasting
Signal source out.When interruption in master source continuous 20~30 seconds or insufficient amplitude, then space signal source is automatically switched to.
As shown in Fig. 2, utility model works principle is: A1, A2 are the audio signals of input, and 2 road signals are sent to control
The end A1-T, A2-T of plate, the signal are sent to the 23 of U2,24 feet, and U2 detects the amplitude of signal, are more than when amplitude is less than setting thresholding
At 30 seconds, that is, think signal fault or interruption, controls voice-frequency relay movement at once, be oriented to space signal source, be simultaneously emitted by sound
Visual alarm prompts staff's handling failure；U3, U4 are 8 bit string line shift registers (74ls164), for driving 7 sections
Led charactron seg7-1, seg7-2,12,13 1,2 feet and 8 feet as serial ports output pin connection U3, U4 of U2.Fig. 2's
Led1, led2 respectively correspond master source and standby signal source, and operating time is bright, and when failure flashes.FM1 is buzzer, for event
Prompt tone is issued when barrier.1,2,3,9,10,11,30,31,32 feet of U2 are separately connected key k1-7, these keys are for being delayed
The functions such as time setting, equipment starting/stopping, ann reset, manual switching.25,26 feet of U2 connect voice-frequency relay
2 feet of relay1 and relay2 control the movement of relay to select normal audio signal.Equipment is carried out using relay
Switching, feature is not change the characteristic of signal, reliable and stable work.
Claims (2)
1. a kind of audio-video signal automatic switchover device, mainly by control circuit U1, input and output terminal and voice-frequency relay group
At, it is characterised in that: the control circuit U1 include single-chip microcontroller U2, U3, U4, charactron SEG7-1, SEG7-2, key K1~
7；The input and output terminal includes master source A1, V1, standby signal source A2, V2 and output end V-m, A-m, A signal1,
Asignal2, the voice-frequency relay are made of relay1, relay2；Master source A1, V1, standby signal source A2, V2 are distinguished
Voice-frequency relay relay1 and relay2 are connected, audio input end A1, A2 in active and standby signal source are linked into control circuit U1's
The end A1-T and A2-T；The output control terminal cont1 and cont2 of control circuit U1 be separately connected voice-frequency relay relay1 and
Single-chip microcontroller in relay2, control circuit U1 by output control terminal cont1 and cont2 control voice-frequency relay relay1 and
Relay2 selects the output of normal signal source.
2. audio-video signal automatic switchover device according to claim 1, it is characterised in that: master source A1, V1,
1 foot of standby signal source A2, V2 is separately connected 5,6,7,8 feet of voice-frequency relay relay1 and relay2, and control circuit U1's is defeated
Control terminal cont1 and cont2 is connected respectively to 2 feet of voice-frequency relay relay1 and relay2 out, and 3,4 feet through relay1 connect
Enter to output end V-m, A-m, Asignal1, Asignal2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820697300.3U CN208316856U (en) | 2018-04-27 | 2018-04-27 | Audio-video signal automatic switchover device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820697300.3U CN208316856U (en) | 2018-04-27 | 2018-04-27 | Audio-video signal automatic switchover device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208316856U true CN208316856U (en) | 2019-01-01 |
Family
ID=64712392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820697300.3U Expired - Fee Related CN208316856U (en) | 2018-04-27 | 2018-04-27 | Audio-video signal automatic switchover device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208316856U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113163270A (en) * | 2020-01-22 | 2021-07-23 | 中国电信股份有限公司 | Method and system for repairing video signal |
-
2018
- 2018-04-27 CN CN201820697300.3U patent/CN208316856U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113163270A (en) * | 2020-01-22 | 2021-07-23 | 中国电信股份有限公司 | Method and system for repairing video signal |
| CN113163270B (en) * | 2020-01-22 | 2022-10-25 | 中国电信股份有限公司 | Method and system for repairing video signal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190101 |
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| CF01 | Termination of patent right due to non-payment of annual fee |