WO2016086462A1 - 电视机及电视机馈电检测方法 - Google Patents

电视机及电视机馈电检测方法 Download PDF

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Publication number
WO2016086462A1
WO2016086462A1 PCT/CN2014/094145 CN2014094145W WO2016086462A1 WO 2016086462 A1 WO2016086462 A1 WO 2016086462A1 CN 2014094145 W CN2014094145 W CN 2014094145W WO 2016086462 A1 WO2016086462 A1 WO 2016086462A1
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WIPO (PCT)
Prior art keywords
polarization voltage
power supply
supply circuit
communication command
circuit
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PCT/CN2014/094145
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English (en)
French (fr)
Inventor
李志强
安慎华
方庆
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深圳Tcl数字技术有限公司
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Publication of WO2016086462A1 publication Critical patent/WO2016086462A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers

Definitions

  • the present invention relates to the field of power supply technologies, and in particular, to a television and television feed detection method.
  • the main board receiving circuit of satellite TV is usually divided into three parts: satellite TV tuner, channel demodulator and satellite power supply circuit.
  • satellite TV tuner In the process of using satellite TV, when the feeder circuit is abnormal, or the external satellite receiving antenna is short-circuited or disconnected, the feeder circuit is abnormal, so that the user cannot watch the satellite TV. Therefore, when the factory produces satellite TV, it needs to detect this. Whether the function of the three module circuits is normal.
  • the existing detection method is simply detected by a dedicated external device, so that the detection efficiency is low.
  • the main object of the present invention is to provide a television and television feed detection method, which aims to simplify the process and operation time of manual detection.
  • the present invention provides a television feed detection method, the television set comprising a satellite tuner, a channel demodulator, an MCU, and a power supply circuit, and the television feed detection method includes the following steps:
  • polarization voltage is a voltage output by the MCU controlling the power supply circuit
  • DiSEqC communication command is a command output by the MCU control channel demodulator
  • the acquired polarization voltage and the DiSEqC communication command are detected. If the detected polarization voltage and the DiSEqC communication command are normal, it is determined that the power supply circuit is normal.
  • the polarization voltage is a corresponding polarization voltage output by the power supply circuit controlled by the channel demodulator after the MCU outputs a polarization voltage command to the channel demodulator.
  • the polarization voltage comprises a horizontal polarization voltage and a vertical polarization voltage.
  • the DiSEqC communication command is a corresponding DiSEqC communication command output by the channel demodulator after the DiSEqC communication command is output to the channel demodulator by the MCU.
  • the step of determining that the power supply circuit is normal includes:
  • the acquired polarization voltage is detected, and if the polarization voltage is within a preset range, the control channel demodulator outputs a DiSEqC communication command;
  • the DiSEqC communication command outputted by the power supply circuit and the satellite tuner is detected. If the DiSEqC communication command outputted by the power supply circuit and the satellite tuner is within a preset range, the power supply circuit is judged to be normal.
  • the step of detecting the acquired polarization voltage comprises:
  • Attenuating the polarization voltage after the attenuation voltage is obtained by the detection circuit attenuating the obtained polarization voltage
  • the polarization voltage after the attenuation processing is detected and judged whether it is within a preset range.
  • the step of detecting the polarization voltage after the attenuation processing and determining whether it is within a preset range further comprises:
  • the power supply circuit polarization voltage abnormality is displayed in the on-screen menu.
  • the step of detecting the acquired DiSEqC communication command comprises:
  • the step of detecting whether the acquired data information is within a preset range further comprises:
  • the acquired data information includes a frequency of the DiSEqC communication command and a command content.
  • the step of determining that the power supply circuit is normal further includes:
  • the response analysis information is received and the response analysis information is correct, it is determined that the line state of the satellite antenna is normal, and the line of the satellite antenna is displayed in the on-screen menu.
  • the present invention further provides a television set comprising a channel demodulator, a power supply circuit and an MCU, one end of the channel demodulator is electrically connected to a satellite tuner, and the other end of the channel demodulator Connected to the MCU, the two ends of the power supply circuit are respectively connected to the satellite tuner and the channel demodulator, and the television further includes a detecting circuit, wherein the input end of the detecting circuit is electrically connected to the satellite tuner, and the output ends are respectively The channel demodulator and the MCU are electrically connected, and the detecting circuit is configured to detect the polarization voltage transmitted by the satellite tuner and the DiSEqC communication command.
  • the MCU is configured to control a power supply circuit output polarization voltage and a control channel demodulator to output a DiSEqC communication command.
  • the detection circuit includes an attenuation circuit and an amplification circuit, and an input end of the attenuation circuit is electrically connected to the satellite tuner, and an output end of the attenuation circuit is electrically connected to the MCU, and the attenuation circuit, And obtaining a polarization voltage and attenuating the obtained polarization voltage to obtain a polarization voltage after the attenuation processing; the input end of the amplifying circuit is electrically connected to the satellite tuner, and the output end of the amplifying circuit is The channel demodulator is electrically connected, and the amplifying circuit is configured to acquire a DiSEqC communication command and perform amplification processing on the obtained voltage signal of the DiSEqC communication command.
  • the MCU includes a first detecting module electrically connected to the attenuation circuit, and the first detecting module is configured to detect a polarization voltage after the attenuation processing by the attenuation circuit, and according to the polarization after the attenuation processing The voltage determines the polarization voltage state of the power supply circuit.
  • the MCU further includes a second detecting module electrically connected to the channel demodulator, the second detecting module is configured to detect, after being amplified by the amplifying circuit and parsed by the channel demodulator
  • the voltage signal of the DiSEqC communication command determines the voltage state of the DiSEqC communication command of the power supply circuit based on the data information obtained after the analysis.
  • the MCU further includes a transmitting module and a third detecting module electrically connected to the satellite tuner, the sending module, configured to send a DiSEqC query LNB status header command of the satellite antenna; the third detecting module And configured to receive response analysis information returned by the satellite tuner, and detect a line state of the satellite antenna according to the received response analysis information.
  • a transmitting module and a third detecting module electrically connected to the satellite tuner, the sending module, configured to send a DiSEqC query LNB status header command of the satellite antenna; the third detecting module And configured to receive response analysis information returned by the satellite tuner, and detect a line state of the satellite antenna according to the received response analysis information.
  • the invention detects the acquired polarization voltage and the DiSEqC communication command through the detection circuit after entering the detection mode, and the DiSEqC communication command after the normal detection of the polarization voltage and after passing through the channel demodulator and the power supply circuit is normal. It is judged that the power supply circuit is normal, so that the television can automatically detect the state of the internal power supply circuit, thereby simplifying the process and operation time of the manual detection, thereby improving the user experience.
  • FIG. 1 is a schematic flow chart of an embodiment of a television feed detection method according to the present invention.
  • FIG. 2 is a schematic diagram of a refinement process of step S120 in FIG. 1;
  • FIG. 3 is a schematic flow chart of another embodiment of a television feed detection method according to the present invention.
  • FIG. 4 is a schematic diagram of functional modules of a television set according to the present invention.
  • Figure 5 is a circuit diagram of the detecting circuit of Figure 4.
  • FIG. 6 is a schematic diagram of functional modules of the MCU of FIG. 4.
  • the television feed detection method includes the following steps:
  • Step S110 acquiring a polarization voltage and a DiSEqC communication command transmitted by the satellite tuner;
  • the polarization voltage is a voltage output by the MCU controlling the power supply circuit, and specifically, the MCU outputs an output polarization voltage command to the channel demodulator.
  • the DiSEqC communication command is a command output by the MCU control channel demodulator, specifically, the MCU outputs an output DiSEqC communication The command is commanded to the channel demodulator and then the corresponding DiSEqC communication command is output by the channel demodulator.
  • satellite television is taken as an example for description.
  • the usual satellite television includes a satellite tuner, a channel demodulator, a power supply circuit, and a main chip.
  • the present invention sets the MCU (Micro Control Unit, micro control unit) is built in the main chip, so there is no need to add additional.
  • MCU Micro Control Unit, micro control unit
  • a detection circuit is added, the input end of which is electrically connected to the satellite tuner, and the output end is electrically connected to the channel demodulator and the MCU, respectively.
  • the main function of the satellite tuner is to receive 950 ⁇ 2150MHZ digital TV high-frequency signals, and perform channel selection and high-frequency signal amplification and frequency conversion processing.
  • the function of the channel demodulator is to perform channel demodulation and decoding on the IF signal of the satellite TV, and output the transport stream to the backend distributor for processing, while receiving the MCU control command and outputting the polarization voltage and the DiSEqC communication command.
  • the function of the power supply circuit is to provide a horizontal polarization voltage of 18.5V and a vertical polarization voltage of 13.5V, and output DiSEqC signal command.
  • the DiSEqC signal command is controlled by the digital satellite television receiver to issue a command set (control command) to the corresponding device, such as a switch, a switcher, an antenna drive device, a satellite tuner for querying a satellite antenna, and a communication command.
  • a command set control command
  • DiSEqC is a control protocol.
  • Step S120 detecting the acquired polarization voltage and the DiSEqC communication command. If the detected polarization voltage and the DiSEqC communication command are both normal, it is determined that the power supply circuit is normal.
  • the invention After entering the detection mode, the invention detects the acquired polarization voltage and the DiSEqC communication command through the detection circuit, and determines that the power supply circuit is normal when the polarization voltage is normal and the DiSEqC communication command is normal, so that the television can automatically Detecting the state of the internal power supply circuit simplifies the process and operation time of the manual detection, thereby improving the user experience.
  • the step S120 includes:
  • Step S121 detecting the acquired polarization voltage, if the polarization voltage is within a preset range, controlling outputting the DiSEqC communication command, in this embodiment, the DiSEqC communication command is output by the MCU control channel demodulator;
  • Step S122 detecting a DiSEqC communication command outputted by the channel demodulator and the power supply circuit. If the DiSEqC communication command outputted by the channel demodulator and the power supply circuit is within a preset range, it is determined that the power supply circuit is normal.
  • the detection polarization voltage and the order of detecting the DiSEqC communication command may be reversed.
  • the step S121 includes:
  • Step S1211 the polarization voltage after the attenuation process is obtained by attenuating the acquired polarization voltage by the detecting circuit;
  • step S1212 the polarization voltage after the attenuation processing is detected and it is determined whether it is in a preset range.
  • the attenuation circuit is composed of resistors R7 and R8.
  • the attenuation circuit attenuates the horizontal polarization voltage of 18.5V or the vertical polarization voltage of 13.5V provided by the power supply circuit to about 3V, and then inputs the ADC to the MCU (Analog-to-digital).
  • the 0 port of the converter, the analog-to-digital converter detects the power supply circuit by detecting the voltage of the ADC0.
  • the LNB that supplies the power supply circuit to the satellite antenna is detected (ie, the low noise down converter: Low) Noise Block) voltage.
  • the attenuation effect of the attenuation circuit composed of resistors R7 and R8 is 7.3 times, that is, the ADC0 input voltage corresponding to the horizontal polarization voltage of 18.0 ⁇ 19.5V is 2.47 ⁇ 2.67V, and the vertical polarization voltage is 13.0 ⁇ 14.5V.
  • the corresponding ADC0 input voltage is 1.78 ⁇ 1.99V.
  • the specific power supply voltage detection process is as follows: first, the power supply circuit is turned on, and the MCU controls the power supply circuit to output a horizontal polarization voltage of 18.5V, and then detects the corresponding voltage value of the ADC0 conversion to determine whether it is within the range of 2.47 to 2.67V. If the horizontal polarization voltage after the attenuation processing is not within the preset range, it indicates that the horizontal polarization voltage is abnormal, and then displays "the power supply circuit horizontal polarization voltage abnormality" in the on-screen menu; if the level after the attenuation processing If the polarization voltage is within the preset range, the horizontal polarization voltage is normal.
  • control the power supply circuit to output a vertical polarization voltage of 13.5V, and then detect the corresponding voltage value of the ADC0 conversion, and determine whether the vertical polarization voltage after the attenuation processing is in the range of 1.78 ⁇ 1.99V, if the vertical pole after the attenuation processing The voltage is not within the preset range, indicating that the vertical polarization voltage is abnormal, and then the "power supply circuit vertical polarization voltage abnormality" is displayed in the on-screen menu. If the vertical polarization voltage after the attenuation processing is within a preset range, it indicates The vertical polarization voltage is normal. When the horizontal polarization voltage or the vertical polarization voltage after the attenuation process is normal, the MCU controls the channel demodulator to issue a DiSEqC communication command.
  • the power supply circuit detection flow is automatically entered, and the MCU outputs a command to the channel demodulator through the I2C to output the horizontal polarization voltage to the power supply circuit. Then, the input voltage of ADC0 is detected to determine whether it is in the preset range. When it is in the preset range, the next step of issuing the DiSEqC communication command is performed. If it is not in the range, it indicates that the power supply circuit is abnormal, and the "power supply circuit polarization voltage abnormality" is displayed in the on-screen menu.
  • the polarization voltage comprises a horizontal polarization voltage and a vertical polarization voltage.
  • the polarization voltage may also be other types according to actual needs, and the embodiment does not limit the detection order of the horizontal polarization voltage and the vertical polarization voltage.
  • the step of detecting the polarization voltage after the attenuation processing and determining whether it is within a preset range further includes :
  • step S1213 if the polarization voltage after the attenuation processing is not in the preset range, it is determined that the power supply circuit is abnormal, and the power supply circuit polarization voltage abnormality is displayed in the screen menu.
  • the step of detecting the acquired DiSEqC communication command in step S120 includes:
  • Step S1221 If the polarization voltage after the attenuation processing is in a preset range, the voltage signal of the DiSEqC communication command is amplified;
  • Step S1222 parsing the amplified voltage signal to obtain data information
  • DiSEqC detection circuit is the amplifier circuit by transistors Q1 and Q2, resistors R1 ⁇ R6, capacitors C1 and C2 Composition.
  • the DiSEqC detection circuit has a voltage peak that amplifies the DiSEqC voltage peak of only 0.65V to 3.3V.
  • the signals output by the satellite tuner include the polarization voltage and the DiSEqC communication command.
  • the DiSEqC communication command is an AC signal. Therefore, the DC signal and the AC signal can be separated by the capacitor C2. They are sent to the ADC0 [analog-to-digital converter] port and channel demodulator of the MCU.
  • Step S1223 It is detected whether the acquired data information is in a preset range.
  • the data information includes the frequency and command information of the DiSEqC communication command
  • the preset frequency of the communication command is 21 ⁇ 23KHZ
  • the command information corresponds to the hexadecimal code value of the DiSEqC communication command.
  • Framing, Address, Command, and Data can be included, where Framing refers to the command format, Address refers to the device address to accept the command, Command refers to the command content, and Data refers to the data content.
  • Step S1224 If the acquired data information is in a preset range, it is determined that the power supply circuit is normal;
  • step S1225 if the acquired data information is not within the preset range, it is determined that the power supply circuit is abnormal and displayed.
  • the channel demodulator itself has the function of receiving and parsing DiSEqC commands.
  • the sampling frequency of the DiSEqC can be detected by the sampling module of the ADC analog-to-digital converter inside the channel demodulator, and the command information of the DiSEqC command can be parsed by the DiSEqC demodulation module inside the channel demodulator.
  • MCU then passes I2C (Inter Integrated Circuit, the internal integrated circuit) accesses the DiSEqC register in the channel demodulator to obtain the command information of DiSEqC.
  • I2C Inter Integrated Circuit, the internal integrated circuit
  • the horizontal voltage and the vertical voltage are detected, and the DiSEqC frequency is not tested in the order, and the order can be reasonably adjusted according to actual needs.
  • the detection condition of the automatic trigger is: when entering the factory mode, and the current source is triggered under the satellite television source, and then detecting the polarization voltage and The frequency and command content of the DiSEqC communication command.
  • the step of detecting whether the acquired data information is in a preset range further includes:
  • Step S1226 sending DiSEqC to query the LNB status command of the satellite antenna
  • Step S1227 receiving response analysis information returned by the satellite tuner, and determining whether the line state of the satellite antenna is normal according to the received response analysis information;
  • step S1228 if the response analysis information is received and the parsed response analysis information is correct, it is determined that the line state of the satellite antenna is normal, and the line of the satellite antenna is displayed in the on-screen menu.
  • the MCU sends the DiSEqC to query the LNB status command of the satellite antenna, and receives the response analysis information sent by the LNB of the satellite antenna and returned by the satellite tuner, and determines whether the satellite antenna line is normal and displays the corresponding according to the received response analysis information.
  • Information First check if the small loop of the internal circuit of the TV is normal, and then check if the large loop of the satellite antenna is normal.
  • the internal small loop refers to a circuit composed of a channel demodulator, a satellite tuner, a power supply circuit, a detection circuit, and an MCU in the main board of the television.
  • the large loop of the satellite antenna is composed of: a small loop, an external signal cable, and a satellite antenna.
  • the DiSEqC communication protocol "queries the LNB status of the satellite antenna" and issues the DiSEqC commands: Framing, Address, Command, and Data, where Framing refers to the command format, Address refers to the device address to accept the command, and Command refers to the command content.
  • Data refers to the data content, for example, its corresponding communication protocol is E2, 11, 10, 1.
  • the LNB of the satellite antenna After receiving the communication command of "Querying the LNB status of the satellite antenna", the LNB of the satellite antenna returns whether the current state is normal.
  • the content of the corresponding reply is E4, 1; when the status is abnormal, there is no reply.
  • the MCU can receive the DiSEqC command sent back from the LNB of the satellite antenna (not shown) through the satellite tuner, and the parsed response information is E4, 1 means that the satellite antenna is normal; when the command from the satellite tuner is not received, it indicates that the satellite antenna is abnormal, and then the satellite antenna is abnormal in the on-screen menu to remind the user to check the external line.
  • the television set includes a channel demodulator 1, a power supply circuit 2, a main chip 3, and a micro control unit built in the main chip 3.
  • MCU4 Micro Control Unit, micro control unit, one end of the channel demodulator 1 is electrically connected to the satellite tuner 5, the other end of the channel demodulator 1 is connected to the MCU 4, and the two ends of the power supply circuit 2 are respectively connected to the antenna satellite tuner 5 and a channel demodulator 1,
  • the television set further comprising a detecting circuit 6, the input end of the detecting circuit 6 is electrically connected to the satellite tuner 5, and the output end is electrically connected to the channel demodulator 1 and the MCU 4, respectively.
  • the detecting circuit 6 is configured to detect the polarization voltage transmitted by the satellite tuner 5 and the DiSEqC communication command. If the detected polarization voltage and the DiSEqC communication command are normal, it is determined that the power supply circuit 2 is normal, and the MCU4 is used for The control power supply circuit 2 outputs a polarization voltage and the control channel demodulator 1 outputs a DiSEqC communication command.
  • satellite television is taken as an example for description.
  • a typical satellite television includes a satellite tweeter satellite tuner 5, a channel demodulator 1, a power supply circuit 2, and a main chip 3.
  • the present invention sets an MCU. (Micro Control Unit, Micro Control Unit) 4 It is built in the main chip 3 and thus does not need to be additionally added.
  • a detection circuit 6 is provided in which the input terminal is electrically connected to the satellite tuner 5 and the output terminal is electrically connected to the channel demodulator 1 and the MCU 4, respectively.
  • the main function of the satellite tuner 5 is to receive 950 ⁇ 2150MHZ digital TV high-frequency signals, and perform channel selection and high-frequency signal amplification and frequency conversion processing.
  • the function of the channel demodulator 1 is to perform channel demodulation and decoding on the intermediate frequency signal of the satellite television, and output the transport stream to the backend distributor for processing.
  • the function of the power supply circuit 2 is to provide a horizontal polarization voltage of 18.5V and a vertical polarization voltage of 13.5V, and output DiSEqC signal command.
  • the DiSEqC signal command is controlled by the digital satellite television receiver to issue a command set (control command) to the corresponding device, such as a switch, a switch, an antenna drive device, a satellite antenna LNB, and the like.
  • DiSEqC is a control protocol.
  • the invention After entering the detection mode, the invention detects the acquired polarization voltage and the DiSEqC communication command through the detection circuit 6, and determines that the power supply circuit 2 is normal when the polarization voltage is normal and the DiSEqC communication command is normal, so that the television
  • the state of the internal power supply circuit 2 can be automatically detected, thereby simplifying the flow and operation time of the manual detection, thereby improving the user experience.
  • the detecting circuit 6 includes an attenuating circuit 101 and an amplifying circuit 102, and the input of the attenuating circuit 101
  • the terminal is electrically connected to the satellite tuner 5, and the output of the attenuation circuit 101 is electrically connected to the MCU 4.
  • the attenuation circuit 101 is configured to acquire a polarization voltage and attenuate the obtained polarization voltage.
  • the input end of the amplifying circuit 102 is electrically connected to the antenna satellite tuner 5, and the output end of the amplifying circuit 102 is electrically connected to the channel demodulator 1
  • the circuit 102 is configured to acquire a DiSEqC communication command and amplify the voltage signal of the acquired DiSEqC communication command.
  • the polarization voltage comprises a horizontal polarization voltage and a vertical polarization voltage.
  • the polarization voltage may also be other types according to actual needs, and the embodiment does not limit the detection order of the horizontal polarization voltage and the vertical polarization voltage.
  • the attenuation circuit 101 is composed of resistors R7 and R8.
  • the attenuation circuit 101 attenuates the horizontal polarization voltage 18.5V or the vertical polarization voltage 13.5V supplied from the power supply circuit 2 to about 3V, and then inputs it to the ADC of the MCU4 (Analog-to-digital).
  • the 0 port of the converter, analog to digital converter, detects the power supply circuit by detecting the voltage of ADC0.
  • the attenuation effect of the attenuation circuit 101 composed of the resistors R7 and R8 is 7.3 times, that is, the ADC0 voltage corresponding to the horizontal polarization voltage of 18.0 to 19.5V is 2.47 to 2.67V, and the vertical polarization voltage is 13.0 to 14.5V.
  • the corresponding ADC0 voltage is 1.78 ⁇ 1.99V.
  • DiSEqC detection circuit 6 that is, amplifier circuit 102 is composed of transistors Q1 and Q2, resistors R1 to R6, capacitors C1 and C2 Composition.
  • the DiSEqC detecting circuit 6 has a voltage peak that amplifies the voltage peak of DiSEqC of only 0.65 V to 3.3 V.
  • the signal output from the satellite tuner 5 includes the polarization voltage and the DiSEqC communication command. Since the polarization voltage is a DC signal, the DiSEqC communication command is an AC signal. Therefore, the DC signal and the AC signal can be separated by the capacitor C2. And sent to the ADC0 port of MCU4 and channel demodulator 1, respectively.
  • the MCU 4 includes a first detecting module 401 electrically connected to the attenuation circuit 101, and the first detecting module 401 is configured to detect attenuated processing by the attenuation circuit 101.
  • the polarization voltage is measured, and the polarization voltage state of the power supply circuit 2 is judged based on the polarization voltage after the attenuation processing.
  • the specific power supply circuit 2 detection process is as follows: first open the power supply circuit 2, the MCU4 controls the power supply circuit 2 to output a horizontal polarization voltage of 18.5V, and then detects the corresponding voltage value of the ADC0 conversion to determine whether it is between 2.47 and 2.67V. Within the range, if the horizontal polarization voltage after the attenuation processing is not within the preset range, it indicates that the horizontal polarization voltage is abnormal, and then the "power supply circuit horizontal polarization voltage abnormality" is displayed in the on-screen menu; The horizontal polarization voltage is within a preset range, indicating that the horizontal polarization voltage is normal.
  • the power supply circuit 2 is further configured to output a vertical polarization voltage of 13.5V, and then detect a corresponding voltage value of the ADC0 conversion, and determine whether the vertical polarization voltage after the attenuation processing is in the range of 1.78 to 1.99V, if the vertical after the attenuation processing The polarization voltage is not within the preset range, indicating that the vertical polarization voltage is abnormal, and then the “vertical polarization vertical voltage abnormality of the power supply circuit” is displayed in the on-screen menu. If the vertical polarization voltage after the attenuation processing is within a preset range, then Indicates that the vertical polarization voltage is normal. When the horizontal polarization voltage or vertical polarization voltage after the attenuation process is normal, the MCU4 issues a DiSEqC communication command.
  • the feed circuit detection flow is automatically entered, and the MCU 4 outputs a command to the channel demodulator 1 through the I2C to output the horizontal electrode of the power supply circuit 2.
  • the voltage is measured, and then the input voltage of ADC0 is detected to determine whether it is in the preset range.
  • the next step of issuing the DiSEqC communication command is performed. If it is not in the range, it indicates that the power supply circuit is abnormal, and the "power supply circuit polarization voltage abnormality" is displayed in the on-screen menu.
  • the MCU 4 further includes a second detecting module 402 electrically connected to the channel demodulator 1, and the second detecting module 402 is configured to detect amplification by the amplifying circuit 102.
  • the voltage signal of the DiSEqC communication command parsed by the channel demodulator 1 is used to determine the voltage state of the DiSEqC communication command of the power supply circuit 2 based on the parsed data information.
  • the channel demodulator 1 itself has a function of receiving and parsing DiSEqC communication commands.
  • the modulation frequency of DiSEqC can be detected by the ADC sampling module inside the channel demodulator 1, and the command information of the DiSEqC command can be parsed by the DiSEqC demodulation module inside the channel demodulator 1.
  • MCU4 passes I2C again (Inter Integrated Circuit, the internal integrated circuit) accesses the DiSEqC register in the demodulator to obtain the DiSEqC data information.
  • the second detection module 402 of the MCU 4 detects that the input waveform is within the preset range 21 ⁇ 23KHZ, and the content of the parsed DiSEqC command is correct, it indicates that the voltage of the DiSEqC communication command is also normal.
  • the data information includes the frequency and command content of the DiSEqC communication command
  • the preset frequency of the communication command is 21 ⁇ 23KHZ
  • the command content corresponds to the hexadecimal code value of the DiSEqC communication command.
  • Framing, Address, Command, and Data can be included, where Framing refers to the command format, Address refers to the device address to accept the command, Command refers to the command content, and Data refers to the data content.
  • the MCU 4 is configured to control the channel demodulator 1 to output the DiSEqC communication command when detecting that the polarization voltage is normal, but detecting the horizontal polarization voltage, the vertical polarization voltage, and then testing the DiSEqC communication command are not in the order.
  • the order can be adjusted reasonably according to actual needs.
  • the detection condition of the automatic trigger is: when entering the factory mode, and the current source is triggered under the satellite television source, and then detecting the polarization voltage and The frequency and command content of the DiSEqC communication command.
  • the MCU 4 further includes a transmitting module 403 and a third detecting module 404 electrically connected to the satellite tuner 5, and the sending module 403 is configured to send a DiSEqC query satellite antenna.
  • the third detection module 404 is configured to receive the response analysis information returned by the satellite tuner 5, and detect the line state of the satellite antenna according to the received response analysis information.
  • the MCU 4 receives the response analysis information returned by the LNB of the satellite antenna and returned by the satellite tuner 5, and receives the response analysis information to determine whether the satellite antenna line is normal and displays the corresponding information. First check if the small loop of the internal circuit of the TV is normal, and then check if the large loop of the satellite antenna is normal.
  • the internal small loop refers to a circuit composed of a channel demodulator 1, a satellite tuner 5, a power supply circuit 2, a detection circuit 6, and an MCU 4 in the main board of the television.
  • the large loop of the satellite antenna is composed of: a small loop, an external signal cable, and a satellite antenna.
  • the MCU4 sends a DiSEqC communication protocol to the LNB of the satellite antenna.
  • the LNB status of the satellite antenna and the DiSEqC commands issued: Framing, Address, Command, and Data, where Framing refers to the command format, Address refers to the device address to accept the command, Command refers to the command content, and Data refers to the data content.
  • the corresponding communication protocol is E2, 11, 10, 1.
  • the LNB of the satellite antenna After receiving the communication command of "Querying the LNB status of the satellite antenna", the LNB of the satellite antenna returns whether the current state is normal.
  • the content of the corresponding reply is E4, 1; when the status is abnormal, there is no reply.
  • the MCU4 can receive the DiSEqC command sent by the LNB of the satellite antenna and sent back through the satellite tuner 5, and the parsed response information is E4, 1 means that the satellite antenna is normal; when the command of the satellite tuner 5 is not received, it indicates that there is an abnormality in the satellite antenna, and then the satellite antenna is abnormal in the on-screen menu, thereby reminding the user to check the external line.

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Abstract

本发明公开了一种电视机馈电检测方法，所述电视机馈电检测方法包括以下步骤：电视机获取卫星高频头输送的极化电压；通过检测电路对获取的极化电压以及DiSEqC通信命令进行检测，若检测的极化电压且DiSEqC通信命令均正常，则判断供电电路正常。本发明还公开了一种电视机。本发明在进入检测模式后通过检测电路对获取的极化电压以及DiSEqC通信命令进行检测，并在检测到极化电压正常情况下且DiSEqC通信命令正常情况下判断供电电路正常，使电视机可以自动检测内部供电电路的状态，从而简化了人工检测的流程和操作时间，进而提高了用户体验。

Description

电视机及电视机馈电检测方法
技术领域
本发明涉及供电技术领域，尤其涉及一种电视机及电视机馈电检测方法。
背景技术
卫星电视的主板接收电路通常分为三部分：卫星电视高频头、信道解调器以及卫星供电电路。用户在使用卫星电视的过程中，当馈电电路发生异常，或外部的卫星接收天线短路或断路导致馈电电路异常时，使用户无法观看卫星电视，因此工厂在生产卫星电视时，需要检测这三个模块电路功能是否正常。现有的检测方法简单地通过专用的外用设备进行检测，从而检测效率低。
上述内容仅用于辅助理解本发明的技术方案，并不代表承认上述内容是现有技术。
发明内容
本发明的主要目的在于提供一种电视机及电视机馈电检测方法，旨在简化人工检测的流程和操作时间。
为实现上述目的，本发明提供一种电视机馈电检测方法，所述电视机包括卫星高频头、信道解调器、MCU以及供电电路，所述电视机馈电检测方法包括以下步骤：
获取卫星高频头输送的极化电压和DiSEqC通信命令，所述的极化电压是由MCU控制供电电路输出的电压，所述DiSEqC通信命令是由MCU控制信道解调器输出的命令；
对获取的极化电压以及DiSEqC通信命令进行检测，若检测的极化电压且DiSEqC通信命令均正常，则判断供电电路正常。
优选地，所述极化电压为在所述MCU输出极化电压命令给所述信道解调器后，由所述信道解调器控制所述供电电路输出的对应的极化电压。
优选地，所述极化电压包括水平极化电压和垂直极化电压。
优选地，所述DiSEqC通信命令为在所述MCU输出DiSEqC通信命令给所述信道解调器后，由所述信道解调器输出的对应的DiSEqC通信命令。
优选地，所述对获取的极化电压以及DiSEqC通信命令进行检测，若检测的极化电压且DiSEqC通信命令均正常，则判断供电电路正常的步骤包括：
对获取的极化电压进行检测，若极化电压在预设范围内，则控制信道解调器输出DiSEqC通信命令；
检测通过供电电路和卫星高频头输出的DiSEqC通信命令，若通过供电电路和卫星高频头输出的DiSEqC通信命令在预设的范围内，则判断供电电路正常。
优选地，所述对获取的极化电压进行检测的步骤包括：
通过检测电路对获取的极化电压进行衰减处理得到衰减处理后的极化电压；
检测衰减处理后的极化电压并判断是否在预设范围。
优选地，所述检测衰减处理后的极化电压并判断是否在预设范围的步骤之后还包括：
若衰减处理后的极化电压不在预设范围，则判断所述供电电路异常，并在屏幕菜单中显示供电电路极化电压异常。
优选地，所述对获取的DiSEqC通信命令进行检测的步骤包括：
对所述DiSEqC通讯命令的电压信号进行放大处理；
解析经放大处理后的电压信号得到数据信息；
检测获取的数据信息是否在预设范围。
优选地，所述检测获取的数据信息是否在预设范围的步骤之后还包括：
若获取的数据信息在预设范围，则判断供电电路正常；
若获取的数据信息不在预设的范围内，则判断供电电路异常并在屏幕菜单中进行显示。
优选地，所述获取的数据信息包括DiSEqC通讯命令的频率和命令内容。
优选地，所述若获取的数据信息在预设范围，则判断供电电路正常的步骤之后还包括：
发送DiSEqC查询卫星天线的LNB状态命令；
接收卫星高频头返回的应答解析信息，并根据接收的应答解析信息判断卫星天线的线路状态是否正常；
若接收到应答解析信息，且应答解析信息正确，则判断卫星天线的线路状态正常，并在屏幕菜单中显示卫星天线的线路正常。
此外，为实现上述目的，本发明还提供一种电视机，包括信道解调器、供电电路以及MCU，所述信道解调器的一端与卫星高频头电连接，信道解调器的另一端与MCU连接，供电电路的两端分别连接卫星高频头和信道解调器，所述电视机还包括检测电路，所述检测电路的输入端与卫星高频头电连接，而输出端分别与信道解调器以及MCU电连接，所述检测电路用于对卫星高频头输送的极化电压以及DiSEqC通信命令进行检测，若检测的极化电压且DiSEqC通信命令均正常，则判断供电电路正常，所述MCU用于控制供电电路输出极化电压以及控制信道解调器输出DiSEqC通信命令。
优选地，所述检测电路包括衰减电路和放大电路，所述衰减电路的输入端与所述卫星高频头电连接，所述衰减电路的输出端与所述MCU电连接，所述衰减电路，用于获取极化电压并对获取的极化电压进行衰减处理得到衰减处理后的极化电压；所述放大电路的输入端与所述卫星高频头电连接，所述放大电路的输出端与所述信道解调器电连接，所述放大电路用于获取DiSEqC通讯命令并对获取的DiSEqC通讯命令的电压信号进行放大处理。
优选地，所述MCU包括与所述衰减电路电连接的第一检测模块，所述第一检测模块用于检测经所述衰减电路衰减处理后的极化电压，并根据衰减处理后的极化电压判断供电电路的极化电压状态。
优选地，所述MCU还包括与所述信道解调器电连接的第二检测模块，所述第二检测模块用于检测经所述放大电路放大处理后并经所述信道解调器解析的DiSEqC通讯命令的电压信号，并根据解析后得到的数据信息判断供电电路DiSEqC通讯命令的电压状态。
优选地，所述MCU还包括与所述卫星高频头电连接的发送模块和第三检测模块，所述发送模块，用于发送DiSEqC查询卫星天线的LNB状态头命令；所述第三检测模块，用于接收卫星高频头返回的应答解析信息，并根据接收的应答解析信息检测卫星天线的线路状态。
本发明在进入检测模式后通过检测电路对获取的极化电压以及DiSEqC通信命令进行检测，并在检测到极化电压正常情况下且通过信道解调器和供电电路之后的DiSEqC通信命令正常情况下判断供电电路正常，使电视机可以自动检测内部供电电路的状态，从而简化了人工检测的流程和操作时间，进而提高了用户体验。
附图说明
图1为本发明电视机馈电检测方法一实施例的流程示意图；
图2为图1中步骤S120的细化流程示意图；
图3为本发明电视机馈电检测方法另一实施例的流程示意图；
图4为本发明电视机的功能模块示意图；
图5为图4中检测电路的电路图；
图6为图4中MCU的功能模块示意图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
本发明提供一种电视机馈电检测方法，参照图1，在一实施例中，所述电视机馈电检测方法包括以下步骤：
步骤S110，获取卫星高频头输送的极化电压和DiSEqC通信命令；所述的极化电压是由MCU控制供电电路输出的电压，具体可以是MCU输出一输出极化电压命令给信道解调器然后控制供电电路输出对应的极化电压，或MCU直接控制供电电路输出极化电压的控制命令，所述DiSEqC通信命令是由MCU控制信道解调器输出的命令，具体是MCU输出一输出DiSEqC通信命令的指令给信道解调器然后由信道解调器输出对应的DiSEqC通信命令。
本实施例中，以卫星电视为例进行说明。通常的卫星电视包括卫星高频头、信道解调器、供电电路以及主芯片，本发明设置MCU (Micro Control Unit，微控制单元）内置于所述主芯片中，因而无需另外增设。此外，增加了一检测电路，其输入端与卫星高频头电连接，而输出端分别与信道解调器以及MCU电连接。
卫星高频头的主要功能是接收950~2150MHZ数字电视高频信号，并进行频道选择和高频信号放大及变频处理。信道解调器的功能是对卫星电视的中频信号进行信道解调和解码，并输出传送流给后端分配器处理，同时接收MCU控制指令并输出极化电压和DiSEqC通信命令。供电电路的功能是提供水平极化电压18.5V和垂直极化电压13.5V,并输出 DiSEqC信号命令。DiSEqC信号命令由数字卫星电视接收机控制，发出命令集（控制命令）给相应设备，如切换开关、切换器、天线驱动设备、查询卫星天线的卫星高频头、通信命令等。本实施例中，DiSEqC是一个控制协议。
步骤S120，对获取的极化电压以及DiSEqC通信命令进行检测，若检测的极化电压且DiSEqC通信命令均正常，则判断供电电路正常。
本发明在进入检测模式后通过检测电路对获取的极化电压以及DiSEqC通信命令进行检测，并在检测到极化电压正常情况下且DiSEqC通信命令正常情况下判断供电电路正常，使电视机可以自动检测内部供电电路的状态，从而简化了人工检测的流程和操作时间，进而提高了用户体验。
在一实施例中，如图2所示，在上述图1的实施例的基础上，本实施例中，所述步骤S120包括：
步骤S121，对获取的极化电压进行检测，若极化电压在预设范围内，则控制输出DiSEqC通信命令，本实施例中DiSEqC通信命令是由MCU控制信道解调器输出；
步骤S122，检测通过信道解调器和供电电路输出的DiSEqC通信命令，若通过信道解调器和供电电路输出的DiSEqC通信命令在预设的范围内，则判断供电电路正常。
本实施中通过在检测到极化电压正常时再对DiSEqC通信命令进行检测，也可以将检测极化电压与检测DiSEqC通信命令的顺序进行对调。
在一实施例中，如图3所示，在上述图2的实施例的基础上，本实施例中，所述步骤S121包括：
步骤S1211，通过检测电路对获取的极化电压进行衰减处理得到衰减处理后的极化电压；
步骤S1212，检测衰减处理后的极化电压并判断是否在预设范围。
本实施例中，衰减电路由电阻R7和R8组成。该衰减电路将供电电路提供的水平极化电压18.5V或垂直极化电压13.5V衰减到3V左右，然后输入到MCU的ADC（Analog-to-digital converter，模拟数字转换器）的0端口，通过检测ADC0的电压实现对供电电路的检测，本实施例中是检测供电电路提供给卫星天线的LNB（即低噪声下变频器：Low Noise Block）电压。电阻R7和R8组成的衰减电路的衰减效果为7.3倍，即水平极化电压18.0~19.5V对应的ADC0输入电压是2.47~2.67V，垂直极化电压13.0~14.5V 对应的ADC0输入电压是1.78~1.99V。当检测到ADC0 在2.47~2.67V和1.78~1.99V的范围内，表明供电电压的工作是正常的。
本实施例中，具体的供电电压检测过程如下：先打开供电电路，MCU控制供电电路输出水平极化电压18.5V，然后检测ADC0转换的对应的电压值，判断是否在2.47~2.67V的范围内，如果衰减处理后的所述水平极化电压不在预设范围内，则表明水平极化电压异常，然后在屏幕菜单中显示“供电电路水平极化电压异常”；如果衰减处理后的所述水平极化电压在预设范围内，则表明水平极化电压正常。再控制供电电路输出垂直极化电压13.5V，然后检测ADC0转换的对应的电压值，判断衰减处理后的所述垂直极化电压是否在1.78~1.99V的范围内，如果衰减处理后的垂直极化电压不在预设范围内，表明垂直极化电压异常，然后在屏幕菜单中显示“供电电路垂直极化电压异常”，如果衰减处理后的所述垂直极化电压在预设范围内，则表明垂直极化电压正常。当衰减处理后的所述水平极化电压或垂直极化电压显示正常时，MCU则会控制信道解调器发出DiSEqC通讯命令。
本实施例中，当检测到在工厂模式并且当前信源是在卫星电视信源中时，自动进入供电电路检测流程，MCU通过I2C向信道解调器输出命令使供电电路输出水平极化电压，然后检测ADC0的输入电压，判断是否在预设范围。当在预设范围时，则进行下一步发出DiSEqC通讯命令的操作，如果不在该范围，则表明表明供电电路功能异常，并在屏幕菜单中显示“供电电路极化电压异常”。
在一实施例中，所述极化电压包括水平极化电压和垂直极化电压。其他实施例中，所述极化电压也可以根据实际需要为其他类型，而且本实施例并不限定所述水平极化电压和垂直极化电压的检测顺序。
在一实施例中，如图3所示，在上述图2的实施例的基础上，本实施例中，所述检测衰减处理后的极化电压并判断是否在预设范围的步骤之后还包括：
步骤S1213，若衰减处理后的极化电压不在预设范围，则判断所述供电电路异常，并在屏幕菜单中显示供电电路极化电压异常。
而步骤S120中对获取的DiSEqC通信命令进行检测的步骤包括：
步骤S1221，若衰减处理后的所述极化电压在预设范围，则对所述DiSEqC通讯命令的电压信号进行放大处理；
步骤S1222，解析经放大处理后的电压信号得到数据信息；
本实施例中，由于卫星高频头输出的DiSEqC通讯命令的信号波形的电压峰值只有0.65V，但信道解调器输入电平需要符合大于2.5V的电平标准，因此需要使信道解调器端口电压峰值放大到3.3V才能进行检测。DiSEqC检测电路即放大电路由三极管Q1和Q2，电阻R1~R6，电容C1和C2 组成。该DiSEqC检测电路具有将DiSEqC只有0.65V的电压峰值放大到3.3V的电压峰值。卫星高频头输出的信号包括极化电压和DiSEqC通讯命令，因极化电压为直流信号，而DiSEqC通讯命令是交流信号，因此，通过电容Ｃ2可将直流信号和交流信号这两个信号分离，并分别送到MCU的ADC0【模数转换器】端口和信道解调器中。
步骤S1223，检测获取的数据信息是否在预设范围。
本实施例中，数据信息包括DiSEqC通讯命令的频率和命令信息，该通讯命令的频率的预设范围为21~23KHZ，而命令信息对应的是DiSEqC通讯命令的十六进制的码值。如可以包括Framing、Address、Command以及Data，其中Framing是指命令格式，Address是指要接受命令的器件地址，Command是指命令内容，Data是指数据内容。
步骤S1224，若获取的数据信息在预设范围，则判断供电电路正常；
步骤S1225，若获取的数据信息不在预设的范围内，则判断供电电路异常并进行显示。
本实施例中，由于信道解调器本身就有接收和解析DiSEqC命令的功能。通过信道解调器内部的ADC模数转换器的取样模块可以检测DiSEqC的调制频率，同时通过信道解调器内部的DiSEqC解调模块可以解析DiSEqC命令的命令信息。MCU再通过I2C（Inter Integrated Circuit，内部集成电路）访问信道解调器内DiSEqC的寄存器即可获得DiSEqC的命令信息。当MCU检测到输入波形的频率为22KHZ，同时解析的DiSEqC命令内容正确时，表明DiSEqC的功能也是正常的。
本实施例中，检测水平电压，垂直电压，再测试DiSEqC频率并没有先后顺序，可以根据实际需要合理调整顺序。自动触发的检测条件为：在进入工厂模式，并且当前信源是在卫星电视信源下就会触发，然后再检测极化电压和 DiSEqC通讯命令的频率和命令内容。
在一实施例中，如图3所示，在上述图2的实施例的基础上，本实施例中，所述检测获取的数据信息是否在预设范围的步骤之后还包括：
步骤S1226，发送DiSEqC查询卫星天线的LNB状态命令；
步骤S1227，接收卫星高频头返回的应答解析信息，并根据接收的应答解析信息判断卫星天线的线路状态是否正常；
步骤S1228，若接收到应答解析信息，且解析的应答解析信息正确，则判断卫星天线的线路状态正常，并在屏幕菜单中显示卫星天线的线路正常。
本实施例中，MCU发送DiSEqC查询卫星天线的LNB状态命令，并接收卫星天线的LNB发出并通过卫星高频头返回的应答解析信息，根据接收的应答解析信息判断卫星天线线路是否正常并显示对应的信息。先检测电视机内部电路的小环路是否正常，然后再检测卫星天线的大环路是否正常。内部的小环路是指由电视的主板里的信道解调器、卫星高频头、供电电路、检测电路以及MCU组成的电路。卫星天线的的大环路是指包含：小环路、外部信号连接线和卫星天线。当检测到在用户模式即用户正常开机，且当前信源是卫星信源时，接着进行上面的供电电路检测流程，当检测供电电路工作正常，然后MCU通过卫星高频头向卫星天线的LNB发出DiSEqC通讯协议“查询卫星天线的LNB状态”，并发出的DiSEqC的命令：Framing、Address、Command以及Data，其中Framing是指命令格式，Address是指要接受命令的器件地址，Command是指命令内容，Data是指数据内容，如，其对应的通讯协议是E2、11、10、1。
本实施例中，卫星天线的LNB接收到“查询卫星天线的LNB状态”的通讯命令后，会回复当前的状态是否正常。当状态正常，对应回复的内容为E4，1；当状态异常，则没有回复。当MCU能接收到卫星天线的LNB（图中未标示出来）通过卫星高频头回送的DiSEqC命令，并解析出的应答解析信息为 E4，1时，则表明卫星天线是正常的；当收不到卫星高频头回送的命令，则表明卫星天线存在异常，然后在屏幕菜单显示卫星天线异常，进而提醒用户检查外部线路。
本发明还提供一种电视机，参照图4，在一实施例中，所述电视机包括信道解调器1、供电电路2、主芯片3以及内置于所述主芯片3中的微控制单元MCU4 (Micro Control Unit，微控制单元），所述信道解调器1的一端与卫星高频头5电连接，信道解调器1的另一端与MCU4连接，供电电路2的两端分别连接天线卫星高频头5和信道解调器1，所述电视机还包括检测电路6，所述检测电路6的输入端与卫星高频头5电连接，而输出端分别与信道解调器1以及MCU4电连接，所述检测电路6用于对卫星高频头5输送的极化电压以及DiSEqC通信命令进行检测，若检测的极化电压且DiSEqC通信命令均正常，则判断供电电路2正常，所述MCU4用于控制供电电路2输出极化电压以及控制信道解调器1输出DiSEqC通信命令。
本实施例中，以卫星电视为例进行说明。通常的卫星电视包括含有卫星电视高频头卫星高频头5、信道解调器1、供电电路2以及主芯片3，本发明设置MCU (Micro Control Unit，微控制单元）4 内置于所述主芯片3中，因而无需另外增设。此外，增加了输入端与卫星高频头5电连接，而输出端分别与信道解调器1以及MCU4电连接的检测电路6。
卫星高频头5的主要功能是接收950~2150MHZ数字电视高频信号，并进行频道选择和高频信号放大及变频处理。信道解调器1的功能是对卫星电视的中频信号进行信道解调和解码，并输出传送流给后端分配器处理。供电电路2的功能是提供水平极化电压18.5V和垂直极化电压13.5V,并输出 DiSEqC信号命令。DiSEqC信号命令由数字卫星电视接收机控制，发出命令集（控制命令）给相应设备，如切换开关、切换器、天线驱动设备、卫星天线的LNB等。本实施例中，DiSEqC是一个控制协议。
本发明在进入检测模式后通过检测电路6对获取的极化电压以及DiSEqC通信命令进行检测，并在检测到极化电压正常情况下且DiSEqC通信命令正常情况下判断供电电路2正常，使电视机可以自动检测内部供电电路2的状态，从而简化了人工检测的流程和操作时间，进而提高了用户体验。
在一优选实施例中，如图5所示，在上述图4的实施例的基础上，本实施例中，所述检测电路6包括衰减电路101和放大电路102，所述衰减电路101的输入端与所述卫星高频头5电连接，所述衰减电路101的输出端与所述MCU4电连接，所述衰减电路101，用于获取极化电压并对获取的极化电压进行衰减处理得到衰减处理后的极化电压；所述放大电路102的输入端与所述天线卫星高频头5电连接，所述放大电路102的输出端与所述信道解调器1电连接，所述放大电路102用于获取DiSEqC通讯命令并对获取的DiSEqC通讯命令的电压信号进行放大处理。
在一优选实施例中，所述极化电压包括水平极化电压和垂直极化电压。其他实施例中，所述极化电压也可以根据实际需要为其他类型，而且本实施例并不限定所述水平极化电压和垂直极化电压的检测顺序。
本实施例中，衰减电路101由电阻R7和R8组成。该衰减电路101将供电电路2提供的水平极化电压18.5V或垂直极化电压13.5V衰减到3V左右，然后输入到MCU4的ADC（Analog-to-digital converter，模拟数字转换器）的0端口，通过检测ADC0的电压实现对供电电路的检测。电阻R7和R8组成的衰减电路101的衰减效果为7.3倍，即水平极化电压18.0~19.5V对应的ADC0电压是2.47~2.67V，垂直极化电压13.0~14.5V 对应的ADC0电压是1.78~1.99V。当检测到ADC0 在2.47~2.67V和1.78~1.99V的范围内，表明供电电路的工作是正常的。
本实施例中，由于高频头卫星高频头5输出的DiSEqC通讯命令的信号波形的电压峰值只有0.65V，但信道解调器1输入电平需要符合大于2.5V的电平标准，因此需要使信道解调器1端口电压峰值放大到3.3V才能进行检测。DiSEqC检测电路6即放大电路102由三极管Q1和Q2，电阻R1~R6，电容C1和C2 组成。该DiSEqC检测电路6具有将DiSEqC只有0.65V的电压峰值放大到3.3V的电压峰值。卫星高频头5输出的信号包括极化电压和DiSEqC通讯命令，因极化电压为直流信号，而DiSEqC通讯命令是交流信号，因此，通过电容Ｃ2可将直流信号和交流信号这两个信号分离，并分别送到MCU4的ADC0端口和信道解调器1中。
在一优选实施例中，参照图6，所述MCU4包括与所述衰减电路101电连接的第一检测模块401，所述第一检测模块401用于检测经所述衰减电路101衰减处理后的极化电压，并根据衰减处理后的极化电压判断供电电路2的极化电压状态。
本实施例中，具体的供电电路2检测过程如下：先打开供电电路2，MCU4控制供电电路2输出水平极化电压18.5V，然后检测ADC0转换的对应的电压值，判断是否在2.47~2.67V的范围内，如果衰减处理后的所述水平极化电压不在预设范围内，则表明水平极化电压异常，然后在屏幕菜单中显示“供电电路水平极化电压异常”；如果衰减处理后的所述水平极化电压在预设范围内，则表明水平极化电压正常。再设置供电电路2输出垂直极化电压13.5V，然后检测ADC0转换的对应的电压值，判断衰减处理后的所述垂直极化电压是否在1.78~1.99V的范围内，如果衰减处理后的垂直极化电压不在预设范围内，表明垂直极化电压异常，然后在屏幕菜单中显示“供电电路垂直极化电压异常”，如果衰减处理后的所述垂直极化电压在预设范围内，则表明垂直极化电压正常。当衰减处理后的所述水平极化电压或垂直极化电压显示正常时，MCU4则会发出DiSEqC通讯命令。
本实施例中，当检测到在工厂模式并且当前信源是在卫星电视信源中时，自动进入馈电电路检测流程，MCU4通过I2C向信道解调器1输出命令使供电电路2输出水平极化电压，然后检测ADC0的输入电压，判断是否在预设范围。当在预设范围时，则进行下一步发出DiSEqC通讯命令的操作，如果不在该范围，则表明表明供电电路功能异常，并在屏幕菜单中显示“供电电路极化电压异常”。
在一优选实施例中，参照图6，所述MCU4还包括与所述信道解调器1电连接的第二检测模块402，所述第二检测模块402用于检测经所述放大电路102放大处理后并经所述信道解调器1解析的DiSEqC通讯命令的电压信号，并根据解析后得到的数据信息判断供电电路2的DiSEqC通讯命令的电压状态。
本实施例中，由于信道解调器1本身就有接收和解析DiSEqC通讯命令的功能。通过信道解调器1内部的ADC取样模块可以检测DiSEqC的调制频率，同时通过信道解调器1内部的DiSEqC解调模块可以解析DiSEqC命令的命令信息。MCU4再通过I2C（Inter Integrated Circuit，内部集成电路）访问解调器里DiSEqC的寄存器即可获得DiSEqC的数据信息。当MCU4的第二检测模块402检测到输入波形在预设范围21~23KHZ内，且解析的DiSEqC命令内容正确时，则表明DiSEqC通信命令的电压也是正常的。
本实施例中，数据信息包括DiSEqC通讯命令的频率和命令内容，该通讯命令的频率的预设范围为21~23KHZ，而命令内容对应的是DiSEqC通讯命令的十六进制的码值。如可以包括Framing、Address、Command以及Data，其中Framing是指命令格式，Address是指要接受命令的器件地址，Command是指命令内容，Data是指数据内容。
本实施例中，MCU4用于在检测到极化电压正常时才控制信道解调器1输出DiSEqC通信命令，但是检测水平极化电压，垂直极化电压，再测试DiSEqC通信命令并没有先后顺序，可以根据实际需要合理调整顺序。自动触发的检测条件为：在进入工厂模式，并且当前信源是在卫星电视信源下就会触发，然后再检测极化电压和 DiSEqC通讯命令的频率和命令内容。
在一优选实施例中，参照图6，所述MCU4还包括与所述卫星高频头5电连接的发送模块403和第三检测模块404，所述发送模块403，用于发送DiSEqC查询卫星天线的LNB命令；所述第三检测模块404，用于接收卫星高频头5返回的应答解析信息，并根据接收的应答解析信息检测卫星天线的线路状态。
本实施例中，MCU4接收卫星天线的LNB发送并通过卫星高频头5返回的应答解析信息，并接收的应答解析信息，判断卫星天线线路是否正常并显示对应的信息。先检测电视机内部电路的小环路是否正常，然后再检测卫星天线的大环路是否正常。内部的小环路是指由电视的主板里的信道解调器1、卫星高频头5、供电电路2、检测电路6以及MCU4组成的电路。卫星天线的的大环路是指包含：小环路、外部信号连接线和卫星天线。当检测到在用户模式即用户正常开机，且当前信源是卫星信源时，接着进行上面的供电电路检测流程，当检测供电电路工作正常，然后MCU4向卫星天线的LNB发出DiSEqC通讯协议“查询卫星天线的LNB状态”，并发出的DiSEqC的命令：Framing、Address、Command以及Data，其中Framing是指命令格式，Address是指要接受命令的器件地址，Command是指命令内容，Data是指数据内容，如，其对应的通讯协议是E2、11、10、1。
本实施例中，卫星天线的LNB接收到“查询卫星天线的LNB状态”的通讯命令后，会回复当前的状态是否正常。当状态正常，对应回复的内容为E4，1；当状态异常，则没有回复。当MCU4能接收到卫星天线的LNB发送并通过卫星高频头5回送的DiSEqC命令，并解析出的应答解析信息为 E4，1时，则表明卫星天线是正常的；当收不到卫星高频头5回送的命令，则表明卫星天线存在异常，然后在屏幕菜单显示卫星天线异常，进而提醒用户检查外部线路。
以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (16)

  1. 一种电视机馈电检测方法，所述电视机包括卫星高频头、信道解调器、MCU以及供电电路，其特征在于，所述电视机馈电检测方法包括以下步骤：
    获取卫星高频头输送的极化电压和DiSEqC通信命令，所述的极化电压是由MCU控制供电电路输出的电压，所述DiSEqC通信命令是由MCU控制信道解调器输出的命令；
    对获取的极化电压以及DiSEqC通信命令进行检测，若检测的极化电压且DiSEqC通信命令均正常，则判断供电电路正常。
  2. 如权利要求1所述的电视机馈电检测方法，其特征在于，所述极化电压为在所述MCU输出极化电压命令给所述信道解调器后，由所述信道解调器控制所述供电电路输出的对应的极化电压。
  3. 如权利要求1或2所述的电视机馈电检测方法，其特征在于，所述极化电压包括水平极化电压和垂直极化电压。
  4. 如权利要求1所述的电视机馈电检测方法，其特征在于，所述DiSEqC通信命令为在所述MCU输出DiSEqC通信命令给所述信道解调器后，由所述信道解调器输出的对应的DiSEqC通信命令。
  5. 如权利要求1所述的电视机馈电检测方法，其特征在于，所述对获取的极化电压以及DiSEqC通信命令进行检测，若检测的极化电压且DiSEqC通信命令均正常，则判断供电电路正常的步骤包括：
    对获取的极化电压进行检测，若极化电压在预设范围内，则控制信道解调器输出DiSEqC通信命令；
    检测通过供电电路和卫星高频头输出的DiSEqC通信命令，若通过供电电路和卫星高频头输出的DiSEqC通信命令在预设的范围内，则判断供电电路正常。
  6. 如权利要求1所述的电视机馈电检测方法，其特征在于，所述对获取的极化电压进行检测的步骤包括：
    通过检测电路对获取的极化电压进行衰减处理得到衰减处理后的极化电压；
    检测衰减处理后的极化电压并判断是否在预设范围。
  7. 如权利要求6所述的电视机馈电检测方法，其特征在于，所述检测衰减处理后的极化电压并判断是否在预设范围的步骤之后还包括：
    若衰减处理后的极化电压不在预设范围，则判断所述供电电路异常，并在屏幕菜单中显示供电电路极化电压异常。
  8. 如权利要求1所述的电视机馈电检测方法，其特征在于，所述对获取的DiSEqC通信命令进行检测的步骤包括：
    对所述DiSEqC通讯命令的电压信号进行放大处理；
    解析经放大处理后的电压信号得到数据信息；
    检测获取的数据信息是否在预设范围。
  9. 如权利要求8所述的电视机馈电检测方法，其特征在于，所述检测获取的数据信息是否在预设范围的步骤之后还包括：
    若获取的数据信息在预设范围，则判断供电电路正常；
    若获取的数据信息不在预设的范围内，则判断供电电路异常并在屏幕菜单中进行显示。
  10. 如权利要求8或9所述的电视机馈电检测方法，其特征在于，所述获取的数据信息包括DiSEqC通讯命令的频率和命令内容。
  11. 如权利要求9所述的电视机馈电检测方法，其特征在于，所述若获取的数据信息在预设范围，则判断供电电路正常的步骤之后还包括：
    发送DiSEqC查询卫星天线的LNB状态命令；
    接收卫星高频头返回的应答解析信息，并根据接收的应答解析信息判断卫星天线的线路状态是否正常；
    若接收到应答解析信息，且应答解析信息正确，则判断卫星天线的线路状态正常，并在屏幕菜单中显示卫星天线的线路正常。
  12. 一种电视机，包括信道解调器、供电电路以及MCU，所述信道解调器的一端与卫星高频头电连接，信道解调器的另一端与MCU连接，供电电路的两端分别连接卫星高频头和信道解调器，其特征在于，所述电视机还包括检测电路，所述检测电路的输入端与卫星高频头电连接，而输出端分别与信道解调器以及MCU电连接，所述检测电路用于对卫星高频头输送的极化电压以及DiSEqC通信命令进行检测，若检测的极化电压且DiSEqC通信命令均正常，则判断供电电路正常，所述MCU用于控制供电电路输出极化电压以及控制信道解调器输出DiSEqC通信命令。
  13. 如权利要求12所述的电视机，其特征在于，所述检测电路包括衰减电路和放大电路，所述衰减电路的输入端与所述卫星高频头电连接，所述衰减电路的输出端与所述MCU电连接，所述衰减电路，用于获取极化电压并对获取的极化电压进行衰减处理得到衰减处理后的极化电压；所述放大电路的输入端与所述卫星高频头电连接，所述放大电路的输出端与所述信道解调器电连接，所述放大电路用于获取DiSEqC通讯命令并对获取的DiSEqC通讯命令的电压信号进行放大处理。
  14. 如权利要求13所述的电视机，其特征在于，所述MCU包括与所述衰减电路电连接的第一检测模块，所述第一检测模块用于检测经所述衰减电路衰减处理后的极化电压，并根据衰减处理后的极化电压判断供电电路的极化电压状态。
  15. 如权利要求13所述的电视机，其特征在于，所述MCU还包括与所述信道解调器电连接的第二检测模块，所述第二检测模块用于检测经所述放大电路放大处理后并经所述信道解调器解析的DiSEqC通讯命令的电压信号，并根据解析后得到的数据信息判断供电电路的DiSEqC通讯命令的电压状态。
  16. 如权利要求12所述的电视机，其特征在于，所述MCU还包括与所述卫星高频头电连接的发送模块和第三检测模块，所述发送模块，用于发送DiSEqC查询卫星天线的LNB状态命令；所述第三检测模块，用于接收卫星高频头返回的应答解析信息，并根据接收的应答解析信息检测卫星天线的线路状态。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109587473A (zh) * 2018-12-04 2019-04-05 安徽站乾科技有限公司 一种卫星电视系统的故障自我检测装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106603089B (zh) * 2017-01-16 2018-10-16 北京星网卫通科技开发有限公司 一种多lnb多本振控制方法及装置
WO2020057493A1 (zh) * 2018-09-19 2020-03-26 青岛海信电器股份有限公司 过流保护方法、电视接收机
CN115150609B (zh) * 2022-08-31 2022-12-13 深圳市华曦达科技股份有限公司 一种卫星电视设备状态检测方法和装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201072865Y (zh) * 2007-06-07 2008-06-11 深圳市同洲电子股份有限公司 卫星接收机测试电路
CN201418118Y (zh) * 2009-06-19 2010-03-03 惠州市伟乐科技有限公司 一种数字电视射频信号转换器
CN102299568A (zh) * 2010-06-24 2011-12-28 海尔集团公司 无线供电检测控制方法与系统

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201518518U (zh) * 2009-10-22 2010-06-30 福建新大陆通信科技有限公司 数字卫星电视接收机顶盒极化电压控制电路
JP2011239311A (ja) * 2010-05-13 2011-11-24 Panasonic Corp 衛星放送受信装置及び衛星放送受信方法
CN102487450A (zh) * 2010-12-02 2012-06-06 深圳市同洲电子股份有限公司 机顶盒的卫星电视信号接收器控制功能的测试方法及系统
CN202496003U (zh) * 2012-02-27 2012-10-17 厦门华侨电子股份有限公司 一种卫星接收电视机上带精确电流控制的天线供电装置
CN202931469U (zh) * 2012-10-30 2013-05-08 深圳Tcl新技术有限公司 高频头供电控制电路及电视机

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201072865Y (zh) * 2007-06-07 2008-06-11 深圳市同洲电子股份有限公司 卫星接收机测试电路
CN201418118Y (zh) * 2009-06-19 2010-03-03 惠州市伟乐科技有限公司 一种数字电视射频信号转换器
CN102299568A (zh) * 2010-06-24 2011-12-28 海尔集团公司 无线供电检测控制方法与系统

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109587473A (zh) * 2018-12-04 2019-04-05 安徽站乾科技有限公司 一种卫星电视系统的故障自我检测装置

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