CN101101315A - Device for detecting connection state of audio-visual apparatus and external apparatus - Google Patents
Device for detecting connection state of audio-visual apparatus and external apparatus Download PDFInfo
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- CN101101315A CN101101315A CNA2006100615317A CN200610061531A CN101101315A CN 101101315 A CN101101315 A CN 101101315A CN A2006100615317 A CNA2006100615317 A CN A2006100615317A CN 200610061531 A CN200610061531 A CN 200610061531A CN 101101315 A CN101101315 A CN 101101315A
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Abstract
The invention discloses a device for detecting connecting state of audiovisual and external device, characterized in that: the device comprises: I/O socket, linked switch and MCU, where a contact of the linked switch is connected with detection level, and the other contact is connected with I/O port of the MCU and the linked switch is used to connect or disconnect the MCU with the detection level according to insert or a plug in the I/O socket or withdraw of the plug from the I/O socket' MUC is used to determine the connection state of the audiovisual and the external device according to the input level of the I/O port. And the invention has features of simple structure, reliable operation, high performance/cost tradeoff, etc.
Description
Technical field
The present invention relates to the audio visual technology field, specifically, relate to the detection and the judgment technology of the connection status of audio-visual equipment and external equipment.
Background technology
Along with the development of audio visual technology, the kind of audio-visual equipment is more and more, except televisor, also has sound equipment, video recorder, CD, VCD, DVD or the like, and is wherein universal with televisor especially.For this class consumption electronic product, common consumption mode generally all is to buy televisor earlier, progressively optionally buys support equipments such as sound equipment, DVD then, and utilizes these equipment to build the one family amusement platform together with televisor.
The connectivity problem that in the process that makes up amusement platform, just can occur thus, signal wire inevitably.Televisor in the past is little, AV terminal is few, moves a little can see just the terminal strip that is positioned on the back cover is finished one by one and patch, and now backward along with the replacement of televisor and increasing of support equipment, signal wire be coupled together more and more inconvenient.With the wall hanging flat TV is example, numerous AV input ports generally all are positioned on the back cover, face wall, and very little with the interval of wall, can't direct viewing, also be not easy to televisor is taken off operation from wall, install again after connecting, the operation that this situation of picture connects signal wire with regard to difficulty how, the user will be difficult to signal wire is inserted corresponding terminal one by one, therefore seeking easily, solution is exactly manufacturer and user's a common aspiration.
For addressing the above problem, more solution has also been arranged in the prior art, the components and parts of needs are more, circuit is complicated or use limited defective but these schemes all exist, therefore, its practical application is restricted, for example, one of existing scheme needs to adopt resistance pressure-dividing network, reference voltage source or reference current source and A/D conversion, and such circuit cost is higher.
Summary of the invention
The object of the present invention is to provide a kind of device that detects audio-visual equipment and external equipment connection status, thereby help the user correctly to be connected the problem of audio-visual equipment and external equipment with the connection status of external equipment to solve detection audio-visual equipment.
For achieving the above object, the present invention adopts following technical scheme:
A kind of device that detects audio-visual equipment and external equipment connection status, described device comprises: I/O socket, linked switch and MCU, wherein,
A contact of linked switch connects the detection level, another contact and microprocessor MCU I/O I/O port link, and are used for inserting or extracting closure or disconnect described MCU and the connection that detects level according to plug in the I/O socket of audio-visual equipment;
MCU is used for according to the described audio-visual equipment of electrical level judging of described I/O port input and the connection state of external equipment.
Wherein said I/O socket is the port that described audio-visual equipment is used for input/output signal.
Wherein said signal input port comprises RCA socket, S terminal and SCART terminal.
Wherein, when described linked switch when being a plurality of, a contact of each linked switch connects the detection level, and another contact links to each other with the I/O port of described MCU respectively.
Wherein, when described linked switch when being a plurality of, a contact of each linked switch connects the detection level, and another contact links to each other with the I/O port of described MCU by multiselect one switch.
Wherein said detection level is the low level of 5V level or ground connection.
Wherein said device also comprises storer, is used for storing the corresponding relation of the I/O port address of the numbering of described linked switch and described MCU.
Wherein said audio-visual equipment is televisor.
Wherein said MCU also is used for controlling display result and shows on screen behind the state that detects audio-visual equipment and external equipment.
The present invention overcomes the deficiencies in the prior art, adopt the switch that links with the I/O socket to detect the I/O port that whether has plug to insert and testing result is delivered to MCU, judge the technical scheme of the connection status of audio-visual equipment and external equipment by MCU, use device of the present invention can detect the connection status of any external equipment and televisor, no matter these equipment are simulation or digital, also no matter its output signal is any form, such as primary colours, component, separation etc., also whether signal output is arranged, all extensively be suitable for no matter whether signal source equipment starts shooting; In addition, device construction of the present invention is simple, and is reliable, more possesses cost advantage with respect to prior art, the cost performance height, thereby be more conducive to promote.
Description of drawings
Fig. 1 is the circuit theory diagrams of the I/O port of the corresponding MCU of a linked switch of the present invention;
Fig. 2 is the circuit theory diagrams of the I/O port of the corresponding MCU of a plurality of linked switch of the present invention.
Embodiment
Ultimate principle of the present invention is to set up a switch with its interlock in the I/O socket of audio-visual equipment, when having plug to insert in the I/O socket, linked switch moves and detection signal is transferred to MCU, and MCU judges the connection status of audio-visual equipment and external equipment according to detection signal.
Fig. 1 is the circuit theory diagrams of the I/O port of the corresponding MCU of a linked switch, by the AV I/O socket that has linked switch, compositions such as MCU and storer.
The AV input socket is the splicing ear that televisor is used from outside input audio/video signal, and at present, widely used is RCA socket and S terminal socket, in addition, also has the habitual SCART socket in Europe.
The RCA socket has three jacks: a video input terminal and two audio input end, each terminal all is independently, need patch respectively, thereby according to requirement of the present invention, each input terminal all is equipped with a linked switch, S terminal socket and SCART socket then are polycore cable formula sockets, the audio frequency terminal, video terminal is all concentrated and is arranged in a circle or the square plug receptacle, compact conformation, as long as supporting with it plug has connected, audio frequency, video has all been connected simultaneously, unlike the audio frequency in the RCA socket, vision signal will patch respectively singly, and therefore whole socket only needs a linked switch just enough.
In order to realize detecting, need connect relevant circuit according to following method: a contact of linked switch connects detects level (in the embodiment of the invention with its ground connection, its level is 0, certainly can also adopt other level, as the 5V level, can directly use Vcc power supply the most frequently used in the digital circuit), another contact is connected to the I/O port of MCU, when having plug to insert in the socket, this linked switch just can be connected, then just transmit a low level signal (actual is 0 level) to the I/O of MCU port, therefore, as long as MCU reads low level detection signal on corresponding ports, just know that corresponding signal input device connects.
Will know further that input equipment (signal source) is to be connected on which or which socket actually, this can differentiate according to the numbering of linked switch.
Among Fig. 1, establishing AV1 is the RCA socket, its
The linked switch of L channel input end correspondence be numbered 1;
The linked switch of R channel input end correspondence be numbered 2;
The linked switch of video inputs correspondence be numbered 3;
The linked switch of S terminal input socket correspondence be numbered 4;
The linked switch of SCART socket input socket correspondence be numbered 5;
When the L channel L of AV1 (RCA socket) has plug to insert, K11 UNICOM, when the R channel R of AV1 has plug to insert, K12 UNICOM, by that analogy, the UNICOM of each linked switch all can send a low level to the I/O port of MCU, supposes that the quantity of I/O port of MCU is corresponding one by one with linked switch, so, according to the numbering of the address of I/O port or linked switch with regard to telling which input socket or/and jack (with regard to the RCA socket) UNICOM.The address of I/O port or the numbering of linked switch can be distributed in programming and be stored in the storer.
If the limited amount of the I/O port of MCU is not enough to correspondingly one by one with linked switch, maybe can only provide 2 ports and be used for described task, so, can set up a multiselect one K switch s this moment between the I/O of each interchange switching and MCU port, as shown in Figure 2.
Wherein, the end that each linked switch was connected on the I/O port of MCU is originally received each input end of multiselect one K switch s now successively, and its numbering is constant; The output coupled of multiselect one K switch s is to the I/O port (being made as data-in port I/Od) of MCU; The selection control end of multiselect one K switch s is attached to another I/O port (being made as control signal output ends mouth I/Oc) of MCU, under the control of MCU, multiselect one K switch s can read the state of linked switch from this port one by one with the data-in port UNICOM of the non-earthing contact and the MCU of each linked switch.
In addition, have the numbering table of comparisons of linked switch in the storer, MCU reads after the state of linked switch, accesses the numbering table of comparisons again from storer, and the two contrast can conclude it is which input terminal or socket UNICOM actually.
At last, for the connection work of giving the user to help intuitively, can try to locate by following up a clue, MCU will detect and judgment result displays on screen, contrasting demonstration for the user and finishing correct connection.
As for display mode, simple some also can use graphic presentation image a bit just with the literal demonstration, and the realization technically of which kind of mode all is the technology of knowing for those of ordinary skills, so do not give unnecessary details.
Claims (9)
1, a kind of device that detects audio-visual equipment and external equipment connection status is characterized in that described device comprises: I/O socket, linked switch and MCU, wherein,
A contact of linked switch connects the detection level, another contact and microprocessor MCU I/O I/O port link, and are used for inserting or extracting closure or disconnect described MCU and the connection that detects level according to plug in the I/O socket of audio-visual equipment;
MCU is used for according to the described audio-visual equipment of electrical level judging of described I/O port input and the connection state of external equipment.
2, device according to claim 1 is characterized in that, described I/O socket is the port that described audio-visual equipment is used for input/output signal.
3, device according to claim 2 is characterized in that, the port of described input signal comprises RCA socket, S terminal and SCART terminal.
4, device according to claim 1 is characterized in that, when described linked switch when being a plurality of, a contact of each linked switch connects the detection level, and another contact links to each other with the I/O port of described MCU respectively.
5, device according to claim 1 is characterized in that, when described linked switch when being a plurality of, a contact of each linked switch connects the detection level, and another contact links to each other with the I/O port of described MCU by multiselect one switch.
6, device according to claim 1 is characterized in that, described detection level is the low level of 5V level or ground connection.
7, device according to claim 1 is characterized in that, described device also comprises storer, is used for storing the corresponding relation of the I/O port address of the numbering of described linked switch and described MCU.
8, device according to claim 1 is characterized in that, described audio-visual equipment is televisor.
9, device according to claim 1 is characterized in that, described MCU also is used for controlling display result and shows on screen behind the state that detects audio-visual equipment and external equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100615317A CN100514077C (en) | 2006-07-03 | 2006-07-03 | Device for detecting connection state of audio-visual apparatus and external apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100615317A CN100514077C (en) | 2006-07-03 | 2006-07-03 | Device for detecting connection state of audio-visual apparatus and external apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101101315A true CN101101315A (en) | 2008-01-09 |
| CN100514077C CN100514077C (en) | 2009-07-15 |
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ID=39035688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100615317A Expired - Fee Related CN100514077C (en) | 2006-07-03 | 2006-07-03 | Device for detecting connection state of audio-visual apparatus and external apparatus |
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| Country | Link |
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| CN (1) | CN100514077C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102141593A (en) * | 2010-12-24 | 2011-08-03 | 华为终端有限公司 | Device and method for detecting extrapolation connection of radio frequency interface |
-
2006
- 2006-07-03 CN CNB2006100615317A patent/CN100514077C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102141593A (en) * | 2010-12-24 | 2011-08-03 | 华为终端有限公司 | Device and method for detecting extrapolation connection of radio frequency interface |
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| Publication number | Publication date |
|---|---|
| CN100514077C (en) | 2009-07-15 |
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