CN201571151U - Multiway voltage switching circuit and television set test circuit - Google Patents
Multiway voltage switching circuit and television set test circuit Download PDFInfo
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- CN201571151U CN201571151U CN2010200013136U CN201020001313U CN201571151U CN 201571151 U CN201571151 U CN 201571151U CN 2010200013136 U CN2010200013136 U CN 2010200013136U CN 201020001313 U CN201020001313 U CN 201020001313U CN 201571151 U CN201571151 U CN 201571151U
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Abstract
The embodiment of the utility model discloses a multiway voltage switching circuit and a television set test circuit, which belongs to the field of electronic technology, and solves the technical problems of narrow application and poor reliability in the prior multiway voltage switching circuit. The multiway voltage switching circuit comprises at least two voltage signal input terminals connected with a circuit board, at least one voltage signal output terminal, and a relay (s) and a relay control module (s) which are connected between the voltage signal input terminals and the voltage signal output terminal (s). When the relay (s) is conducted, voltage signals input into the voltage signal input terminals by the circuit board are transmitted to the voltage signal output terminal via the relay (s) and are output by the voltage signal output terminals; and the relay control module (s) is used for controlling the relay (s) to be conducted or switched off. The utility model is applied to testing the performance of circuit boards.
Description
Technical field
The utility model belongs to electronic technology field, the tv test circuit that is specifically related to a kind of plurality of voltages commutation circuit and is provided with this plurality of voltages commutation circuit.
Background technology
Along with the continuous development of electronic technology, television set has become one of household electrical appliance the most common in people's daily life.
After various functional modules on the circuit board in the television set or function element assemble, need test, just can dispatch from the factory after the test passes circuit board.Involving great expense owing to testing apparatus (or claiming testing equipment) in the prior art, so when the TV set circuit plate is tested, the shared testing apparatus of circuit board that common polylith need be tested, like this when test, one of the selection earlier between the circuit board that polylith need be tested of plurality of voltages commutation circuit just need be set to be tested, after the circuit board testing of selecting finishes earlier, then switch another piece circuit board again and test, until all circuit board testings is intact.
Existing plurality of voltages commutation circuit, comprise voltage signal input, plurality of voltages signal output part that multichannel (multichannel refers to more than the two-way) links to each other with circuit board, be connected in cmos analog switch and switch control module between every road voltage signal input and the every road voltage signal output end, wherein: during the cmos analog switch conducting, the voltage signal of circuit board input voltage signal input transfers to voltage signal output end by cmos analog switch, and exports testing equipment to by voltage signal output end; Switch control module is used to control one or more cmos analog switch conducting or disconnection.
The inventor finds that there is following problem at least in prior art in realizing process of the present utility model:
The operating voltage of employed cmos analog switch and operating current are all smaller in the existing plurality of voltages commutation circuit, and conducting resistance is bigger, can't pass through magnitude of voltage, current value ratio higher voltage signal, and the scope of application is narrow; When if the voltage signal magnitude of voltage that passes through or current value are big, cause that easily cmos analog switch damages and lost efficacy, and causes the reliability of entire circuit poor.
The utility model content
The tv test circuit that the utility model embodiment provides a kind of plurality of voltages commutation circuit and has been provided with this plurality of voltages commutation circuit has solved existing plurality of voltages commutation circuit and has had the technical problem that the scope of application is narrow and reliability is poor.
For achieving the above object, embodiment of the present utility model adopts following technical scheme:
This plurality of voltages commutation circuit, comprise voltage signal input, at least one road voltage signal output end that two-way at least links to each other with circuit board, be connected in relay and relay control module between described voltage signal input in every road and the described voltage signal output end in every road, wherein:
During described relay conducting, the voltage signal that described circuit board is imported described voltage signal input transfers to described voltage signal output end by described relay, and by described voltage signal output end output;
Described relay control module is used to control one or more described relay conducting or disconnection.
Further, described relay is a solid-state relay.
Further, described relay control module comprises industrial computer and the level output unit that links to each other with described industrial computer, wherein:
Described industrial computer is used to receive the control command of user's input, and according to described control command described level output unit is exported control command;
Described level output unit is used to receive described control command, and according to described control command by the mode of described relay input high level or low level signal being selected, is controlled one or more described relay conducting or disconnection.
Further, described industrial computer links to each other with described level output unit by the RS232 interface.
Further, described single-chip microcomputer is 51 series monolithics.
Further, this plurality of voltages commutation circuit comprises the described voltage signal input of at least 4 groups and 1 group of described voltage signal output end, wherein:
Every group of described voltage signal input comprises 24 road voltage signal inputs;
1 group of described voltage signal output end comprises 24 road voltage signal output ends;
Each described relay connects 2 road voltage signal inputs and 2 road voltage signal output ends respectively;
Described relay control module be used to control wherein one group of described voltage signal input and described relay conducting or the disconnection between 1 group of described voltage signal output end.
Further, described voltage signal is an audio signal.
Further, described voltage signal output end links to each other with the A/D integrated circuit board, and described A/D integrated circuit board is used to receive the voltage signal of described voltage signal output end output and described voltage signal decoding back is play by playback equipment.
Further, described circuit board is the mainboard of television set.
This tv test circuit comprises the plurality of voltages commutation circuit that above-mentioned the utility model embodiment is provided.
Compared with prior art, the utility model provides the arbitrary technical scheme in the technique scheme to have following advantage:
Be connected with relay between every road voltage signal input and the every road voltage signal output end in the plurality of voltages commutation circuit that the utility model embodiment is provided, by controlling one or more relay conducting or disconnecting and just can control voltage signal output end and export the voltage signal which or which road voltage signal input is imported, and relay is compared with cmos analog switch used in the prior art and is had the surge voltage height, the characteristics that conduction impedance is little, and operating voltage and operating current are also bigger, so can pass through magnitude of voltage and current value ratio higher voltage signal, the scope of application is wider; Normally used voltage signal all can not cause damage to relay in this technical field, and then the reliability of entire circuit is relatively good, has the technical problem that the scope of application is narrow and reliability is poor so solved existing plurality of voltages commutation circuit.
Description of drawings
Fig. 1 is the schematic diagram of the plurality of voltages commutation circuit internal structure that embodiment of the present utility model provided;
Fig. 2 is the schematic diagram of a kind of execution mode of the plurality of voltages commutation circuit that embodiment of the present utility model provided;
Fig. 3 is the schematic diagram of another execution mode of the plurality of voltages commutation circuit that embodiment of the present utility model provided;
Fig. 4 is the schematic diagram of the embodiment circuit of the plurality of voltages commutation circuit repeat circuit that embodiment of the present utility model provided.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is described in detail.
The utility model embodiment provides that a kind of scope of application is relatively wide, the reasonable plurality of voltages commutation circuit of reliability and the tv test circuit that is provided with this plurality of voltages commutation circuit.
As shown in Figure 1, the plurality of voltages commutation circuit that the utility model embodiment is provided, comprise voltage signal input 1, at least one road voltage signal output end 2 that two-way at least links to each other with circuit board 8, be connected in relay 3 and relay control module 4 between every road voltage signal input 1 and the voltage signal output end 2, wherein: during relay 3 conductings, the voltage signal of circuit board 8 input voltage signal inputs 1 transfers to voltage signal output end 2 by relay 3, and by voltage signal output end 2 outputs; Relay control module 4 is used to control one or more relay 3 conductings or disconnection.
Be connected with relay 3 between every road voltage signal input 1 and the every road voltage signal output end 2 in the plurality of voltages commutation circuit that the utility model embodiment is provided, just can control the voltage signal that voltage signal output end 2 output which or which road voltage signal inputs 1 are imported by controlling one or more relay 3 conductings or disconnection, and relay 3 is compared with cmos analog switch used in the prior art and is had the surge voltage height, the characteristics that conduction impedance is little, and operating voltage and operating current are also bigger, so can pass through magnitude of voltage and current value ratio higher voltage signal, the scope of application is wider; Normally used voltage signal all can not cause damage to relay 3 in this technical field, and then the reliability of entire circuit is relatively good, has the technical problem that the scope of application is narrow and reliability is poor so solved existing plurality of voltages commutation circuit.
As shown in Figure 2, relay control module 4 comprises industrial computer (Industrial Personal Computer, IPC) 5 and the level output unit 6 that links to each other with industrial computer 5, wherein: industrial computer 5 is used to receive the control command of user's input, and according to control command level output unit 6 is exported control commands; Level output unit 6 is used to receive control command, and according to control command by the mode of relay 3 input high levels or low level signal being selected, is controlled one or more relay 3 conductings or disconnection.
Single-chip microcomputer is 51 series monolithics.51 series monolithics are that a kind of data-handling capacity is more intense, the single-chip microcomputer of technology maturation and stable performance, and are suitable to level output unit 6.Certainly, the chip that level output unit 6 also can adopt other single-chip microcomputers outside 51 series monolithics or have similar functions in the present embodiment.
As shown in Figure 3, the plurality of voltages commutation circuit comprises at least 4 group voltage signal inputs 1 and 1 group of voltage signal output end 2 in the present embodiment, and wherein: every group of voltage signal input 1 comprises 24 road voltage signal inputs 1; 1 group of voltage signal output end 2 comprises 24 road voltage signal output ends 2; Each relay 3 connects 2 road voltage signal inputs 1 and 2 road voltage signal output ends 2 respectively; Relay control module 4 be used to control wherein one group of voltage signal input 1 and relay 3 conductings or the disconnection between 1 group of voltage signal output end 2.
Because the function element on the circuit board 8 is many, so voltage signal input 1 is also many usually, 1 group of voltage signal input 1 can satisfy the test needs of most television set interior circuit boards 8 basically.Connect 1 group of voltage signal input 1 on a circuit board 8 in the present embodiment, like this, present embodiment plurality of voltages commutation circuit as shown in Figure 3 can be used to test 4 circuit boards 8, with 4 circuit boards 8 wherein the voltage signal of 1 group of voltage signal input, 1 output that connected of circuit board 8 by 2 outputs of 1 group of voltage signal output end.
Voltage signal is an audio signal.The audio-frequency function module is the important component part on the TV set circuit plate 8, whether can normal play by test audio signal, can judge whether the audio-frequency function module can operate as normal.
Audio signal can be transmitted by voltage signal.Certainly, voltage signal also can be other low frequency signals outside the audio signal in the present embodiment.
Voltage signal output end 2 links to each other with as shown in Figure 3 A/D integrated circuit board 7, and A/D integrated circuit board 7 is used to receive the voltage signal of voltage signal output end 2 outputs and voltage signal decoding back is play by playback equipment.A/D integrated circuit board 7 analog signal can be converted into general television for play equipment (for example: the digital signal that can discern and play loud speaker), play by playback equipments such as sound equipments then.
The tv test circuit that the utility model embodiment is provided comprises the plurality of voltages commutation circuit that above-mentioned the utility model embodiment is provided.
Because the identical technical characterictic of plurality of voltages commutation circuit that is provided with above-mentioned the utility model embodiment is provided the utility model embodiment, so both not only have unicity, and can produce identical technique effect, solves identical technical problem.
The above; it only is embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claim.
Claims (10)
1. plurality of voltages commutation circuit, it is characterized in that: comprise voltage signal input, at least one road voltage signal output end that two-way at least links to each other with circuit board, be connected in relay and relay control module between described voltage signal input in every road and the described voltage signal output end in every road, wherein:
During described relay conducting, the voltage signal that described circuit board is imported described voltage signal input transfers to described voltage signal output end by described relay, and by described voltage signal output end output;
Described relay control module is used to control one or more described relay conducting or disconnection.
2. plurality of voltages commutation circuit according to claim 1 is characterized in that: described relay is a solid-state relay.
3. plurality of voltages commutation circuit according to claim 1 is characterized in that: described relay control module comprises industrial computer and the level output unit that links to each other with described industrial computer, wherein:
Described industrial computer is used to receive the control command of user's input, and according to described control command described level output unit is exported control command;
Described level output unit is used to receive described control command, and according to described control command by the mode of described relay input high level or low level signal being selected, is controlled one or more described relay conducting or disconnection.
4. plurality of voltages commutation circuit according to claim 3 is characterized in that: described industrial computer links to each other with described level output unit by the RS232 interface.
5. plurality of voltages commutation circuit according to claim 4 is characterized in that: described single-chip microcomputer is 51 series monolithics.
6. plurality of voltages commutation circuit according to claim 1 is characterized in that: this plurality of voltages commutation circuit comprises the described voltage signal input of at least 4 groups and 1 group of described voltage signal output end, wherein:
Every group of described voltage signal input comprises 24 road voltage signal inputs;
1 group of described voltage signal output end comprises 24 road voltage signal output ends;
Each described relay connects 2 road voltage signal inputs and 2 road voltage signal output ends respectively;
Described relay control module be used to control wherein one group of described voltage signal input and described relay conducting or the disconnection between 1 group of described voltage signal output end.
7. plurality of voltages commutation circuit according to claim 1 is characterized in that: described voltage signal is an audio signal.
8. plurality of voltages commutation circuit according to claim 1, it is characterized in that: described voltage signal output end links to each other with the A/D integrated circuit board, and described A/D integrated circuit board is used to receive the voltage signal of described voltage signal output end output and described voltage signal decoding back is play by playback equipment.
9. plurality of voltages commutation circuit according to claim 1 is characterized in that: described circuit board is the mainboard of television set.
10. a tv test circuit is characterized in that: comprise the arbitrary described plurality of voltages commutation circuit of claim 1 to 9.
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CN2010200013136U CN201571151U (en) | 2010-01-04 | 2010-01-04 | Multiway voltage switching circuit and television set test circuit |
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CN2010200013136U CN201571151U (en) | 2010-01-04 | 2010-01-04 | Multiway voltage switching circuit and television set test circuit |
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CN2010200013136U Expired - Fee Related CN201571151U (en) | 2010-01-04 | 2010-01-04 | Multiway voltage switching circuit and television set test circuit |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108234905A (en) * | 2018-03-22 | 2018-06-29 | 四川金网通电子科技有限公司 | Multichannel audio-video frequency On-line Product aging switching circuit with interlock function |
CN108710327A (en) * | 2018-05-28 | 2018-10-26 | 湖北三江航天万峰科技发展有限公司 | A kind of Small Universal multibus control device |
CN109738676A (en) * | 2019-03-06 | 2019-05-10 | 湖南省湘电试验研究院有限公司 | A kind of frequency signal wiring switching device and its application method |
-
2010
- 2010-01-04 CN CN2010200013136U patent/CN201571151U/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108234905A (en) * | 2018-03-22 | 2018-06-29 | 四川金网通电子科技有限公司 | Multichannel audio-video frequency On-line Product aging switching circuit with interlock function |
CN108710327A (en) * | 2018-05-28 | 2018-10-26 | 湖北三江航天万峰科技发展有限公司 | A kind of Small Universal multibus control device |
CN109738676A (en) * | 2019-03-06 | 2019-05-10 | 湖南省湘电试验研究院有限公司 | A kind of frequency signal wiring switching device and its application method |
CN109738676B (en) * | 2019-03-06 | 2023-11-24 | 湖南省湘电试验研究院有限公司 | Frequency signal wiring switching device and application method thereof |
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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: 20100901 Termination date: 20130104 |
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CF01 | Termination of patent right due to non-payment of annual fee |