CN202496003U - Antenna power supply device with current accurately controlled on satellite receiver television - Google Patents
Antenna power supply device with current accurately controlled on satellite receiver television Download PDFInfo
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- CN202496003U CN202496003U CN2012200679108U CN201220067910U CN202496003U CN 202496003 U CN202496003 U CN 202496003U CN 2012200679108 U CN2012200679108 U CN 2012200679108U CN 201220067910 U CN201220067910 U CN 201220067910U CN 202496003 U CN202496003 U CN 202496003U
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Abstract
The utility model discloses an antenna power supply device with current accurately controlled on a satellite receiver television. The antenna power supply device comprises an alternating current-direct current circuit, a direct current supply switch, an antenna power supply circuit with current accurately controlled, a power supply voltage detection circuit, a microprocessor unit, a user command receiving unit, a display processing unit and an LCD display; an output end of the alternating current-direct current circuit is respectively connected with the direct current power supply switch, the microprocessor unit, the user command receiving unit, the display processing unit and the LCD display. The antenna power supply device provided by the utility model, on the one hand, can precisely set power supply current of a satellite antenna and provide reliable hardware measures for overcurrent protection or short circuit protection so as to protect the power supply of front end from being affected; on the other hand, when the antenna power supply voltage is in a short circuit or a fault of the satellite antenna power supply voltage caused by other factors happens, the microprocessor can intelligently power down the antenna power supply, and at the same time, prompt a user with the information of the fault of the antenna power supply on a screen of the television.
Description
Technical field
The utility model relates to a kind of satellite and receives television set, particularly relates to a kind of satellite and receives on the television set antenna power supply device with accurate Current Control.
Background technology
The television set of satellite reception at present adopts common step-up DC-DC or rear end to add a LDO usually and supplies power to satellite earth antenna; There are some shortcomings in this supply power mode: can't accurately control the supply current size that satellite antenna is provided, the supply current of rough size can only be provided; In case antenna power supply overload or short circuit can't provide circuit protection timely, cause front end mains ripple or rush of current, thereby cause the fault of system for TV set.
The utility model content
The purpose of the utility model is to overcome the deficiency of prior art; Provide a kind of satellite to receive on the television set antenna power supply device with accurate Current Control; On the one hand; The supply current of satellite antenna can accurately be set, the hardware measure of reliable overcurrent protection or short-circuit protection is provided, unaffected with the power supply of protection front end; On the other hand, when the short circuit of antenna supply power voltage or other cause satellite antenna not have the fault of supply power voltage, can intelligently the antenna power supply be broken off, simultaneously the information of prompting user antenna power supply trouble on television screen through microprocessor.
The utility model solves the technical scheme that its technical problem adopted: with the antenna power supply device of accurate Current Control, comprise that alternating current changes direct current circuit, direct current supply switch, the antenna power supply circuits with accurate Current Control, supply power voltage testing circuit, microprocessor unit, user instruction receiving element, display processing unit and LCD display on a kind of satellite reception television set; The input that alternating current changes the direct current circuit is connected to external AC; The output that alternating current changes the direct current circuit is connected to direct current supply switch, microprocessor unit, user instruction receiving element, display processing unit and LCD display respectively, and the former converts the alternating current of input direct current into and to the latter direct current is provided; The output of direct current supply switch is connected to the input with the antenna power supply circuits of accurate Current Control, the switching that the dc signal that the antenna power supply circuits of the accurate Current Control of direct current supply switch subtend band provide opens or closes; Output with the antenna power supply circuits of accurate Current Control is connected to satellite earth antenna, and the former detects and provide to the latter dc signal that boosts to the direct current current signal of input; The input of supply power voltage testing circuit is connected to satellite earth antenna; The output of supply power voltage testing circuit is connected to microprocessor unit; The supply power voltage testing circuit detects the voltage signal of satellite earth antenna, and testing result is exported to microprocessor unit handle; The output of user instruction receiving element is connected to microprocessor unit, and the former exports to microprocessor unit with user's instruction and handles; The output of microprocessor unit is connected to the control end of direct current supply switch, and the former exports control signal to the latter, the switching that microprocessor unit control direct current supply switch opens or closes; The output of microprocessor unit is connected to the input of display processing unit, and the output of display processing unit is connected to LCD display.
The antenna power supply circuits of the accurate Current Control of said band are made up of step-up DC-DC unit that accurate electric current is provided with unit and belt current detection; The input that accurate electric current is provided with the unit is connected to the output of said direct current supply switch, and the output that accurate electric current is provided with the unit is connected to the current detecting end of the step-up DC-DC unit of belt current detection; Step-up DC-the input of DC unit that belt current detects is connected to the output of said direct current supply switch, and the output of step-up DC-DC unit that belt current detects is connected to satellite earth antenna.
It is 1% precision current-limiting resistance that said accurate electric current is provided with the unit, and one of this 1% precision current-limiting resistance is connected to and is connected to said direct current supply switch, and the other end of this 1% precision current-limiting resistance is connected to the current detecting end of the step-up DC-DC unit of belt current detection.
The resistance R of said 1% precision current-limiting resistance is obtained by formula:
Io=Ii*Vi*A%/Vo;------------formula one
Ii=B/R;-------------------------formula two
Wherein, the demand current value that Io supplies power for the satellite antenna of setting, Vo is the supply power voltage value of the satellite antenna of setting, and Ii is the input current value of step-up DC-DC unit, and Vi is the input voltage value of step-up DC-DC unit; A% is the conversion efficiency of step-up DC-DC unit; B is the input current definite value parameter of step-up DC-DC unit.
Said direct current supply switch is the PMOS pipe, and the switch control pin of direct current supply switch is connected with the IO1 port of microprocessor unit.
Said supply power voltage testing circuit is made up of resistance R 1 and resistance R 2, and each end of resistance R 1 and resistance R 2 is connected to form and connects end altogether, and the end that connects altogether of resistance R 1 and resistance R 2 is connected with the IO2 port of microprocessor unit; The other end of resistance R 1 is connected to satellite earth antenna, the other end ground connection of resistance R 2.
With the antenna power supply device of accurate Current Control, its course of work is following on a kind of satellite reception television set of the utility model:
A. microprocessor unit receives the signal that the user instruction receiving element is defeated by;
B. the not instruction for opening of the microprocessor unit judges command reception unit signal of being defeated by is if continue next step, if not then returning steps A;
C. microprocessor unit drives the state that the direct current supply switch switches to out to direct current supply switch output control signal;
D. supply power to satellite earth antenna.
With the antenna power supply device of accurate Current Control, in the process of satellite earth antenna power supply, comprise as follows on a kind of satellite reception television set of the utility model:
D1. the supply power voltage testing circuit is gathered the voltage signal of satellite earth antenna in real time;
D2. microprocessor unit is monitored the level of the port that joins with the supply power voltage testing circuit;
D3. microprocessor unit judges whether this level is low level, if continue next step, if not then returning step D2;
D4. microprocessor unit drives the state that the direct current supply switch switches to the pass to direct current supply switch output control signal;
D5. microprocessor unit is exported control signal to display processing unit, microprocessor unit notice display processing unit process information;
D6. display processing unit is exported process information to LCD display, shows the information of antenna power supply trouble on the LCD display.
A kind of satellite of the utility model receives on the television set antenna power supply device with accurate Current Control; In the antenna power supply circuits with accurate Current Control; The size of monitoring supply current Ii in real time is responsible in step-up DC-DC unit that belt current detects; Simultaneously input voltage Vi is boosted into the supply power voltage Vo that satellite earth antenna needs, voltage Vo can regulate through non-essential resistance according to the supply power voltage demand and be provided with.Current detecting part in step-up DC-DC unit that belt current detects is in case find supply current Io overcurrent (＞Io
(setting)), the supply power voltage Vo of satellite earth antenna will reduce, Io further strengthens along with supply current, the supply power voltage Vo of satellite earth antenna will continue to reduce, thus the value of the input current Ii of protection DC-DC always＜=Ii
(setting), and then the source current of protection DC-DC front end can not impacted.When the supply power voltage Vo of satellite earth antenna is shorted to ground; The current detecting part will let boost DC-DC quit work immediately; Thereby the input voltage Vi of protection front end is unaffected, can not cause the fluctuation of input voltage Vi, thereby ensure the safety of TV set power system.
The beneficial effect of the utility model is; Constitute antenna power supply device owing to adopted alternating current to change direct current circuit, direct current supply switch, antenna power supply circuits, supply power voltage testing circuit, microprocessor unit, user instruction receiving element, display processing unit and LCD display with accurate Current Control; On the one hand; The supply current of satellite antenna can accurately be set, the hardware measure of reliable overcurrent protection or short-circuit protection is provided, unaffected with the power supply of protection front end; On the other hand, when the short circuit of antenna supply power voltage or other cause satellite antenna not have the fault of supply power voltage, can intelligently the antenna power supply be broken off, simultaneously the information of prompting user antenna power supply trouble on television screen through microprocessor.
Below in conjunction with accompanying drawing and embodiment the utility model is done further explain; The antenna power supply device with accurate Current Control is not limited to embodiment on the television set but a kind of satellite of the utility model receives.
Description of drawings
Fig. 1 is the theory diagram of the device of the utility model;
Fig. 2 is the theory diagram of antenna power supply circuits of the accurate Current Control of band of the utility model;
Fig. 3 is the connection sketch map between direct current supply switch, supply power voltage testing circuit and the microprocessor unit of the utility model;
Fig. 4 is the sketch map that user interface is selected power supply;
Fig. 5 is the sketch map at the prompting interface of antenna power supply trouble.
Embodiment
Embodiment; Shown in Figure 3 referring to Fig. 1, Fig. 2; With the antenna power supply device of accurate Current Control, comprise that alternating current changes direct current circuit 1, direct current supply switch 2, the antenna power supply circuits 3 with accurate Current Control, supply power voltage testing circuit 4, microprocessor unit 5, user instruction receiving element 6, display processing unit 7 and LCD display 8 on a kind of satellite reception television set of the utility model; The input that alternating current changes direct current circuit 1 is connected to external AC; The output that alternating current changes direct current circuit 1 is connected to direct current supply switch 2, microprocessor unit 5, user instruction receiving element 6, display processing unit 7 and LCD display 8 respectively, and the former converts the alternating current of input direct current into and to the latter direct current is provided; The output of direct current supply switch 2 is connected to the input with the antenna power supply circuits 3 of accurate Current Control, the switching that the dc signal that the antenna power supply circuits 3 of the accurate Current Control of direct current supply switch 2 subtend bands provide opens or closes; Output with the antenna power supply circuits 3 of accurate Current Control is connected to satellite earth antenna 9, and the former detects and provide to the latter dc signal that boosts to the direct current current signal of input; The input of supply power voltage testing circuit 4 is connected to satellite earth antenna 9; The output of supply power voltage testing circuit 4 is connected to microprocessor unit 5; The voltage signal of 4 pairs of satellite earth antennas 9 of supply power voltage testing circuit detects, and testing result is exported to microprocessor unit 5 handle; The output of user instruction receiving element 6 is connected to microprocessor unit 5, and the former exports to microprocessor unit 5 with user's instruction and handles; The output of microprocessor unit 5 is connected to the control end of direct current supply switch 2, and the former exports control signal to the latter, the switching that microprocessor unit 5 control direct current supply switches 2 open or close; The output of microprocessor unit 5 is connected to the input of display processing unit 7, and the output of display processing unit 7 is connected to LCD display 8.
The antenna power supply circuits 3 of the accurate Current Control of said band are provided with unit 31 by accurate electric current and form with step-up DC-DC unit 32 that belt current detects; The input that accurate electric current is provided with unit 31 is connected to the output of said direct current supply switch 2, and the output that accurate electric current is provided with unit 31 is connected to the current detecting end of the step-up DC-DC unit 32 of belt current detection; Step-up DC-the input of DC unit 32 that belt current detects is connected to the output of said direct current supply switch 2, and the output of step-up DC-DC unit 32 that belt current detects is connected to satellite earth antenna 9.
It is 1% precision current-limiting resistance that said accurate electric current is provided with unit 31; One of this 1% precision current-limiting resistance is connected to and is connected to said direct current supply switch 2, and the other end of this 1% precision current-limiting resistance is connected to the current detecting end of the step-up DC-DC unit 32 of belt current detection.
The resistance R of said 1% precision current-limiting resistance is obtained by formula:
Io=Ii*Vi*A%/Vo;------------formula one
Ii=B/R;-------------------------formula two
Wherein, the demand current value that Io supplies power for the satellite antenna of setting, Vo is the supply power voltage value of the satellite antenna of setting, and Ii is the input current value of step-up DC-DC unit, and Vi is the input voltage value of step-up DC-DC unit; A% is the conversion efficiency of step-up DC-DC unit; B is the input current definite value parameter of step-up DC-DC unit;
Supposing to be provided with satellite antenna supply current demand is Io
(setting), bringing formula one into, can to calculate the input current value of DC-DC be Ii
(setting)Can further calculate the resistance value R of 1% precision that needs setting through formula two.
Said direct current supply switch 2 is the PMOS pipe, and the switch control pin of direct current supply switch 2 is connected with the IO1 port of microprocessor unit 5.
Said supply power voltage testing circuit 4 is made up of resistance R 1 and resistance R 2, and each end of resistance R 1 and resistance R 2 is connected to form and connects end altogether, and the end that connects altogether of resistance R 1 and resistance R 2 is connected with the IO2 port of microprocessor unit 5; The other end of resistance R 1 is connected to satellite earth antenna 9, the other end ground connection of resistance R 2.
User instruction receiving element 6 can be that satellite receives the button circuits for triggering on the television set, also can be the remote controller receiving circuit.
With the antenna power supply device of accurate Current Control, its course of work is following on a kind of satellite reception television set of the utility model:
A. microprocessor unit receives the signal that the user instruction receiving element is defeated by; At this moment, satellite receives television set explicit user operation interface, and is as shown in Figure 4;
B. the not instruction for opening of the microprocessor unit judges command reception unit signal of being defeated by is if continue next step, if not then returning steps A;
C. microprocessor unit drives the state that the direct current supply switch switches to out to direct current supply switch output control signal;
D. supply power to satellite earth antenna.
With the antenna power supply device of accurate Current Control, in the process of satellite earth antenna power supply, comprise as follows on a kind of satellite reception television set of the utility model:
D1. the supply power voltage testing circuit is gathered the voltage signal of satellite earth antenna in real time;
D2. microprocessor unit is monitored the level of the port that joins with the supply power voltage testing circuit;
D3. microprocessor unit judges whether this level is low level, if continue next step, if not then returning step D2;
D4. microprocessor unit drives the state that the direct current supply switch switches to the pass to direct current supply switch output control signal;
D5. microprocessor unit is exported control signal to display processing unit, microprocessor unit notice display processing unit process information;
D6. display processing unit is exported process information to LCD display, shows the information of antenna power supply trouble on the LCD display, and at this moment, satellite receives the prompting interface that television set provides the antenna power supply trouble, and is as shown in Figure 5.
A kind of satellite of the utility model receives on the television set antenna power supply device with accurate Current Control; In antenna power supply circuits 3 with accurate Current Control; The size of monitoring supply current Ii in real time is responsible in the step-up DC that belt current detects-DC unit 32; Simultaneously input voltage Vi is boosted into the supply power voltage Vo that satellite earth antenna 9 needs, voltage Vo can regulate through non-essential resistance according to the supply power voltage demand and be provided with.Current detecting part in the step-up DC that belt current detects-DC unit 32 is in case find supply current Io overcurrent (＞Io
(setting)), the supply power voltage Vo of satellite earth antenna 9 will reduce, Io further strengthens along with supply current, the supply power voltage Vo of satellite earth antenna 9 will continue to reduce, thus the value of the input current Ii of protection DC-DC always＜=Ii
(setting), and then the source current of protection DC-DC front end can not impacted.When the supply power voltage Vo of satellite earth antenna 9 is shorted to ground; The current detecting part will let boost DC-DC quit work immediately; Thereby the input voltage Vi of protection front end is unaffected, can not cause the fluctuation of input voltage Vi, thereby ensure the safety of TV set power system.The power supply that direct current supply switch 2 adopts a PMOS pipe to be responsible for opening and turn-offing antenna, its switch control pin is controlled by an IO mouth of microprocessor unit.Supply power voltage detects by an IO mouth sending into microprocessor unit behind two electric resistance partial pressures.Whether the user can be provided with antenna and supply power through the custom menu on the television set, in case select power supply, microprocessor unit control IO1 opens the direct current supply switch, passes through the supply power voltage of the real-time monitor satellite antenna of IO2 simultaneously.When IO2 detects supply power voltage and is low level; Microprocessing unit can be controlled IO1 and turn-off the direct current supply switch immediately; The information of notifying display processing unit on LCD display, to show the antenna power supply trouble simultaneously, failure cause possibly be that the satellite antenna supply power voltage is shorted to ground or other causes satellite antenna not have the fault of supply power voltage.
A kind of satellite that the foregoing description only is used for further specifying the utility model receives on the television set antenna power supply device with accurate Current Control; But the utility model is not limited to embodiment; Every technical spirit according to the utility model all falls in the protection range of the utility model technical scheme any simple modification, equivalent variations and modification that above embodiment did.
Claims (5)
1. a satellite receives on the television set with the antenna power supply device of accurate Current Control, it is characterized in that: comprise that alternating current changes direct current circuit, direct current supply switch, the antenna power supply circuits with accurate Current Control, supply power voltage testing circuit, microprocessor unit, user instruction receiving element, display processing unit and LCD display; The input that alternating current changes the direct current circuit is connected to external AC; The output that alternating current changes the direct current circuit is connected to direct current supply switch, microprocessor unit, user instruction receiving element, display processing unit and LCD display respectively, and the former converts the alternating current of input direct current into and to the latter direct current is provided; The output of direct current supply switch is connected to the input with the antenna power supply circuits of accurate Current Control, the switching that the dc signal that the antenna power supply circuits of the accurate Current Control of direct current supply switch subtend band provide opens or closes; Output with the antenna power supply circuits of accurate Current Control is connected to satellite earth antenna, and the former detects and provide to the latter dc signal that boosts to the direct current current signal of input; The input of supply power voltage testing circuit is connected to satellite earth antenna; The output of supply power voltage testing circuit is connected to microprocessor unit; The supply power voltage testing circuit detects the voltage signal of satellite earth antenna, and testing result is exported to microprocessor unit handle; The output of user instruction receiving element is connected to microprocessor unit, and the former exports to microprocessor unit with user's instruction and handles; The output of microprocessor unit is connected to the control end of direct current supply switch, and the former exports control signal to the latter, the switching that microprocessor unit control direct current supply switch opens or closes; The output of microprocessor unit is connected to the input of display processing unit, and the output of display processing unit is connected to LCD display.
2. with the antenna power supply device of accurate Current Control, it is characterized in that on the satellite reception television set according to claim 1: the antenna power supply circuits of the accurate Current Control of said band are made up of step-up DC-DC unit that accurate electric current is provided with unit and belt current detection; The input that accurate electric current is provided with the unit is connected to the output of said direct current supply switch, and the output that accurate electric current is provided with the unit is connected to the current detecting end of the step-up DC-DC unit of belt current detection; Step-up DC-the input of DC unit that belt current detects is connected to the output of said direct current supply switch, and the output of step-up DC-DC unit that belt current detects is connected to satellite earth antenna.
3. satellite according to claim 2 receives on the television set antenna power supply device with accurate Current Control; It is characterized in that: it is 1% precision current-limiting resistance that said accurate electric current is provided with the unit; One of this 1% precision current-limiting resistance is connected to and is connected to said direct current supply switch, and the other end of this 1% precision current-limiting resistance is connected to the current detecting end of the step-up DC-DC unit of belt current detection.
4. with the antenna power supply device of accurate Current Control, it is characterized in that: said direct current supply switch is the PMOS pipe, and the switch control pin of direct current supply switch is connected with the IO1 port of microprocessor unit on the satellite reception television set according to claim 1.
5. satellite according to claim 1 receives on the television set antenna power supply device with accurate Current Control; It is characterized in that: said supply power voltage testing circuit is made up of resistance R 1 and resistance R 2; Each end of resistance R 1 and resistance R 2 is connected to form and connects end altogether, and the end that connects altogether of resistance R 1 and resistance R 2 is connected with the IO2 port of microprocessor unit; The other end of resistance R 1 is connected to satellite earth antenna, the other end ground connection of resistance R 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200679108U CN202496003U (en) | 2012-02-27 | 2012-02-27 | Antenna power supply device with current accurately controlled on satellite receiver television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200679108U CN202496003U (en) | 2012-02-27 | 2012-02-27 | Antenna power supply device with current accurately controlled on satellite receiver television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202496003U true CN202496003U (en) | 2012-10-17 |
Family
ID=47002213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200679108U Expired - Fee Related CN202496003U (en) | 2012-02-27 | 2012-02-27 | Antenna power supply device with current accurately controlled on satellite receiver television |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202496003U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105657411A (en) * | 2014-12-02 | 2016-06-08 | 深圳Tcl数字技术有限公司 | TV and TV feed detection method |
| CN109935950A (en) * | 2018-08-29 | 2019-06-25 | 浙江科比特科技有限公司 | A kind of antenna feeding circuit and antenna |
| CN110933383A (en) * | 2018-09-19 | 2020-03-27 | 青岛海信电器股份有限公司 | Overcurrent protection method and device for antenna control chip and satellite television receiver |
-
2012
- 2012-02-27 CN CN2012200679108U patent/CN202496003U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105657411A (en) * | 2014-12-02 | 2016-06-08 | 深圳Tcl数字技术有限公司 | TV and TV feed detection method |
| CN109935950A (en) * | 2018-08-29 | 2019-06-25 | 浙江科比特科技有限公司 | A kind of antenna feeding circuit and antenna |
| CN109935950B (en) * | 2018-08-29 | 2024-03-15 | 浙江科比特科技有限公司 | Antenna power supply circuit and antenna |
| CN110933383A (en) * | 2018-09-19 | 2020-03-27 | 青岛海信电器股份有限公司 | Overcurrent protection method and device for antenna control chip and satellite television receiver |
| CN110933383B (en) * | 2018-09-19 | 2022-04-29 | 海信视像科技股份有限公司 | Overcurrent protection method and device for antenna control chip and satellite television receiver |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121017 Termination date: 20140227 |