CN204481976U - A kind of data sampling apparatus for transmitter monitoring system - Google Patents
A kind of data sampling apparatus for transmitter monitoring system Download PDFInfo
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- CN204481976U CN204481976U CN201520201437.1U CN201520201437U CN204481976U CN 204481976 U CN204481976 U CN 204481976U CN 201520201437 U CN201520201437 U CN 201520201437U CN 204481976 U CN204481976 U CN 204481976U
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Abstract
The utility model relates to a kind of data sampling apparatus for transmitter monitoring system, the video surveillance sampling to transmitter input program stream can be realized, sample with to the dynamic monitoring of transmitter output signal frequency spectrum, it comprises: RF input interface, ASI input interface, radio frequency analog demodulation sample circuit, Digital Down Convert circuit, decoding serial-parallel conversion circuit, local oscillator, usb circuit, USB interface and control circuit; Wherein, RF input interface is connected input radio frequency signal with radio frequency analog demodulation sample circuit, radio frequency analog demodulation sample circuit is connected with Digital Down Convert circuit and exports digital medium-frequency signal, Digital Down Convert circuit is connected with usb circuit and exports digital baseband signal, ASI input interface is connected with decoding serial-parallel conversion circuit and inputs TS and flow, decoding serial-parallel conversion circuit is connected with the input of usb circuit and exports Parallel Digital signal bit stream, and usb circuit is connected output difference sub-signal with USB interface.
Description
Technical field
The utility model relates to digital television transfer monitoring field, particularly relates to a kind of data sampling apparatus for transmitter monitoring system.
Background technology
Along with the arrival of information age, information and digital technology are developed by leaps and bounds, and TV tech, after experienced by the revolutionary change from black-and-white TV to color TV, has progressively entered the second revolution from simulated television to Digital Television.Digital television techniques is the up-to-date TV tech of the third generation after black-and-white TV, color TV, is an important component part in current digital information technique field.
Digital TV transmitter is the nucleus equipment of digital television system.In order to monitor the operating state of transmitter, general digital TV transmitter is all furnished with monitoring system, and it is formed generally as shown in Figure 1, forms primarily of data acquisition unit 111, the machine main control module 112 and control host computer 113 far away.Wherein, data acquisition unit 111 is connected with the machine main control module 112 by RS485 interface 114, the machine main control module 112 by RJ-45 network interface 115 with far control host computer 113 and be connected.Transmitter monitoring system can the operating state of parallel centralized detecting transmitter on the main control computer of and control centre on-the-spot in the machine, to fault alarm and automatic record, greatly can alleviate the work load of staff, increase work efficiency.
Existing transmitter monitoring system generally can monitor transmitter supply, power output; Power amplifier input-output power, power tube electric current, temperature; Transmitter switch machine state, the information such as malfunction.Visible existing transmitter monitoring system is mainly monitored the operating state of each unit in transmitter inside, and the situation to transmitter input programme content, and the quality of transmitter output signal is not monitored.Therefore, existing transmitter monitoring system still has the space of improving further.
Summary of the invention
The purpose of this utility model is, overcome the defect that prior art exists, and a kind of data sampling apparatus for transmitter monitoring system of new structure is provided, technical problem to be solved makes it can realize sampling to the video surveillance of transmitter input program stream, and sample to the dynamic monitoring of transmitter output signal frequency spectrum.
The purpose of this utility model and solve its technical problem be adopt following technical scheme realize.According to a kind of data sampling apparatus for transmitter monitoring system that the utility model proposes, it is characterized in that it comprises; RF input interface, ASI input interface, radio frequency analog demodulation sample circuit, Digital Down Convert circuit, decoding serial-parallel conversion circuit, local oscillator, usb circuit, USB interface and control circuit; Wherein, described RF input interface is connected input radio frequency signal with the input of described radio frequency analog demodulation sample circuit; The input of described radio frequency analog demodulation sample circuit is also connected with the output of described local oscillator and receives local oscillation signal; The output of described radio frequency analog demodulation sample circuit is connected with the input of described Digital Down Convert circuit and exports digital medium-frequency signal; The input of described Digital Down Convert circuit is also connected with the output of described local oscillator and receives local oscillation signal; The output of described Digital Down Convert circuit is connected with the input of described usb circuit and exports digital baseband signal; Described ASI input interface is connected with the input of described decoding serial-parallel conversion circuit and inputs TS and flow; The output of described decoding serial-parallel conversion circuit is connected with the input of described usb circuit and exports Parallel Digital signal bit stream; The output of described usb circuit is connected output difference sub-signal with described USB interface; Described control circuit is connected with described radio frequency analog demodulation sample circuit, described Digital Down Convert circuit, described decoding serial-parallel conversion circuit and described usb circuit respectively and exports control signal.
The purpose of this utility model and solve its technical problem and can also be further achieved by the following technical measures.
The aforesaid data sampling apparatus for transmitter monitoring system, also comprises clock distributor, and the input of wherein said Digital Down Convert circuit to be connected with the output of described local oscillator by described clock distributor to receive local oscillation signal.
The aforesaid data sampling apparatus for transmitter monitoring system, wherein said radio frequency analog demodulation sample circuit comprises: radio demodulating ADC chip; Described Digital Down Convert circuit and described control circuit are formed primarily of FPGA master chip; Described decoding serial-parallel conversion circuit comprises: equalizer and serial decoder; Described usb circuit comprises: USB chip; Wherein, the input of described radio demodulating ADC chip is connected received RF signal with described RF input interface; The input of described radio demodulating ADC chip is also connected with described local oscillator and receives local oscillation signal; The output of described radio demodulating ADC chip is connected with the input of described FPGA master chip and exports digital medium-frequency signal; The input of described FPGA master chip is also connected with the output of described clock distributor and receives local oscillation signal, and the input of wherein said clock distributor is connected with the output of described local oscillator; Described equalizer is connected with described ASI input interface and receives TS and flow; The output of described equalizer is connected with the input of described serial decoder and exports the TS after adjusting and flow; The output of described serial decoder is connected with the input of described FPGA master chip and exports Parallel Digital signal bit stream; The output of described FPGA master chip is connected with the input of described USB chip and exports digital baseband signal and Parallel Digital signal bit stream, and the output of described USB chip is connected output difference sub-signal with described USB interface.
The utility model compared with prior art has obvious advantage and beneficial effect.By technique scheme, a kind of data sampling apparatus for transmitter monitoring system of the utility model at least has following advantages and beneficial effect: the utility model can be applicable to various types of digital TV transmitter monitoring system, it is by being transferred to analog if signal by radiofrequency signal solution, digital medium-frequency signal is obtained after A/D sampling, digital medium-frequency signal is down-converted to digital baseband signal exported by USB interface, can realize sampling to the Monitoring Data of transmitter output signal frequency spectrum; By being Parallel Digital signal bit stream by TS stream decoding serioparallel exchange, then being exported by USB interface, can realize sampling to the Monitoring Data of transmitter input video program.Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to technological means of the present utility model can be better understood, and can be implemented according to the content of specification, and can become apparent to allow above and other object of the present utility model, feature and advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the block diagram of existing transmitter monitoring system.
Fig. 2 is the block diagram of a kind of data sampling apparatus for transmitter monitoring system of the utility model.
Fig. 3 is the principle schematic of the radio frequency analog demodulation sample circuit of a kind of data sampling apparatus for transmitter monitoring system of the utility model.
Fig. 4 is the principle schematic of the Digital Down Convert circuit of a kind of data sampling apparatus for transmitter monitoring system of the utility model.
Fig. 5 is the block diagram of a preferred embodiment of a kind of data sampling apparatus for transmitter monitoring system of the utility model.
Embodiment
For further setting forth the utility model for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to according to a kind of data sampling apparatus for transmitter monitoring system its embodiment, structure, feature and the effect thereof that the utility model proposes, be described in detail as follows.
Referring to shown in Fig. 2, is the block diagram of a kind of data sampling apparatus for transmitter monitoring system of the utility model.A kind of data sampling apparatus 200 for transmitter monitoring system of the present utility model can realize the video surveillance sampling to transmitter input program stream, sample with to the dynamic monitoring of transmitter output signal frequency spectrum, it forms primarily of RF input interface 211, ASI input interface 221, radio frequency analog demodulation sample circuit 212, Digital Down Convert circuit 213, decoding serial-parallel conversion circuit 222, local oscillator 214, usb circuit 232, USB interface 231 and control circuit 240.
Wherein, RF input interface 211 is connected input radio frequency signal with the input of radio frequency analog demodulation sample circuit 212, the input of radio frequency analog demodulation sample circuit 212 is also connected with the output of local oscillator 214 and receives local oscillation signal, radio frequency analog demodulation sample circuit 212 is for realizing the conversion of analog radio-frequency signal to digital medium-frequency signal, the output of radio frequency analog demodulation sample circuit 212 is connected with the input of Digital Down Convert circuit 213 and exports digital medium-frequency signal, the input of Digital Down Convert circuit 213 is also connected with the output of local oscillator 214 and receives local oscillation signal, Digital Down Convert circuit 213 is for realizing the conversion of digital medium-frequency signal to digital baseband signal, the output of Digital Down Convert circuit 213 is connected with the input of usb circuit 232 and exports digital baseband signal, ASI input interface 221 is connected with the input of decoding serial-parallel conversion circuit 222 and inputs TS and flow, decoding serial-parallel conversion circuit 222 is for realizing TS and flow to and the conversion of Parallel Digital signal bit stream, the output of decoding serial-parallel conversion circuit 22 is connected with the input of usb circuit 232 and exports Parallel Digital signal bit stream, the output of usb circuit 232 is connected output difference sub-signal with USB interface 231, usb circuit 232 and USB interface 231 are for realizing the external transmission of image data, the data collected are transferred to the relevant device of needs by USB interface 231, control circuit 240 respectively with radio frequency analog demodulation sample circuit 212, Digital Down Convert circuit 213, decoding serial-parallel conversion circuit 222 is connected output control signal with usb circuit 232.
Referring to shown in Fig. 3, is the principle schematic of the radio frequency analog demodulation sample circuit of a kind of data sampling apparatus for transmitter monitoring system of the utility model.Radio frequency analog demodulation sample circuit 212 of the present utility model is first by by radiofrequency signal and local oscillation signal mixing, produces frequency spectrum shift, generates analog if signal; Then A/D sampling is carried out to analog if signal, obtain digital medium-frequency signal.
Referring to shown in Fig. 4, is the principle schematic of the Digital Down Convert circuit of a kind of data sampling apparatus for transmitter monitoring system of the utility model.Digital Down Convert circuit 213 of the present utility model is orthogonal local oscillation signal mixing that the digital medium-frequency signal that first obtains by be sampled by A/D and digital controlled oscillator (NCO) produce, and the digital medium-frequency signal of characteristic frequency is downconverted to base band; Then utilize low-pass filtering filter out-band external noise, extract useful signal; Extracted by D afterwards and change sampling rate, reduce output data rate, obtain the digital baseband signal being conducive to rear class Digital Signal Processing.Wherein, the extraction factor variations scope that D takes out is larger, then can design the flexibility realizing broadband or arrowband down-conversion higher.
The utility model also can comprise clock distributor, and wherein the input of Digital Down Convert circuit 213 to be connected with the output of local oscillator 214 by clock distributor to receive local oscillation signal.
A kind of data sampling apparatus for transmitter monitoring system of the utility model, to the dynamic monitoring sampling section of transmitter output signal frequency spectrum, by making radiofrequency signal after radio frequency analog demodulation sample circuit 212 and Digital Down Convert circuit 213 process, the digital baseband signal obtained exports through USB interface, is transferred to corresponding equipment and carries out subsequent treatment; To transmitter input program stream video surveillance sampling section, be by make TS flow through decoding serial-parallel conversion circuit 222 process after, the Parallel Digital baseband signal obtained exports through USB interface, is transferred to corresponding equipment and carries out subsequent treatment.
Referring to shown in Fig. 5, is the block diagram of a preferred embodiment of a kind of data sampling apparatus for transmitter monitoring system of the utility model.In the present embodiment, a kind of data sampling apparatus for transmitter monitoring system of the utility model is based on software and radio technique, adopts FPGA platform to realize.Wherein, radio frequency analog demodulation sample circuit 212 mainly adopts radio demodulating ADC 311 chip to realize, Digital Down Convert circuit 213 and control circuit 240 mainly adopt FPGA master chip 312 to realize, decoding serial-parallel conversion circuit 222 forms primarily of equalizer 313 and serial decoder 314, and usb circuit 232 mainly adopts USB chip 315 to realize.
As shown in Figure 5, the input of radio demodulating ADC chip 311 is connected received RF signal with RF input interface 211, the input of radio demodulating ADC chip 311 is also connected with the output of local oscillator 214 and receives local oscillation signal, the output of radio demodulating ADC chip 311 is connected with the input of FPGA master chip 312 and exports digital medium-frequency signal, the input of FPGA master chip 312 is also connected with the output of clock distributor 316 and receives local oscillation signal, and wherein the input of clock distributor 316 is connected with the input of local oscillator 214.The input of equalizer 313 is connected with ASI input interface 221 and receives TS and flow, the output of equalizer 313 is connected with the input of serial decoder 314 and exports the TS after adjusting and flow, the output of serial decoder 314 is connected with the input of FPGA master chip 312 and exports Parallel Digital signal bit stream, FPGA master chip 312 requires to carry out transmitted in packets to bit stream data according to usb protocol, and control interface is changed.The output of FPGA master chip 312 is connected with the input of USB chip 315 and exports digital baseband signal and Parallel Digital signal bit stream, and the output of USB chip 315 is connected output difference sub-signal with USB interface 231.
The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to the utility model, although the utility model discloses as above with preferred embodiment, but and be not used to limit the utility model, any those skilled in the art are not departing within the scope of technical solutions of the utility model, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solutions of the utility model, according to any simple modification that technical spirit of the present utility model is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (3)
1. for a data sampling apparatus for transmitter monitoring system, it is characterized in that it comprises: RF input interface, ASI input interface, radio frequency analog demodulation sample circuit, Digital Down Convert circuit, decoding serial-parallel conversion circuit, local oscillator, usb circuit, USB interface and control circuit;
Wherein, described RF input interface is connected input radio frequency signal with the input of described radio frequency analog demodulation sample circuit; The input of described radio frequency analog demodulation sample circuit is also connected with the output of described local oscillator and receives local oscillation signal;
The output of described radio frequency analog demodulation sample circuit is connected with the input of described Digital Down Convert circuit and exports digital medium-frequency signal; The input of described Digital Down Convert circuit is also connected with the output of described local oscillator and receives local oscillation signal;
The output of described Digital Down Convert circuit is connected with the input of described usb circuit and exports digital baseband signal;
Described ASI input interface is connected with the input of described decoding serial-parallel conversion circuit and inputs TS and flow;
The output of described decoding serial-parallel conversion circuit is connected with the input of described usb circuit and exports Parallel Digital signal bit stream;
The output of described usb circuit is connected output difference sub-signal with described USB interface;
Described control circuit is connected with described radio frequency analog demodulation sample circuit, described Digital Down Convert circuit, described decoding serial-parallel conversion circuit and described usb circuit respectively and exports control signal.
2. the data sampling apparatus for transmitter monitoring system according to claim 1, it is characterized in that it also comprises clock distributor, the input of wherein said Digital Down Convert circuit to be connected with the output of described local oscillator by described clock distributor to receive local oscillation signal.
3. the data sampling apparatus for transmitter monitoring system according to claim 2, is characterized in that wherein said radio frequency analog demodulation sample circuit comprises: radio demodulating ADC chip; Described Digital Down Convert circuit and described control circuit are formed primarily of FPGA master chip; Described decoding serial-parallel conversion circuit comprises: equalizer and serial decoder; Described usb circuit comprises: USB chip;
Wherein, the input of described radio demodulating ADC chip is connected received RF signal with described RF input interface; The input of described radio demodulating ADC chip is also connected with described local oscillator and receives local oscillation signal; The output of described radio demodulating ADC chip is connected with the input of described FPGA master chip and exports digital medium-frequency signal; The input of described FPGA master chip is also connected with the output of described clock distributor and receives local oscillation signal, and the input of wherein said clock distributor is connected with the output of described local oscillator;
Described equalizer is connected with described ASI input interface and receives TS and flow; The output of described equalizer is connected with the input of described serial decoder and exports the TS after adjusting and flow; The output of described serial decoder is connected with the input of described FPGA master chip and exports Parallel Digital signal bit stream;
The output of described FPGA master chip is connected with the input of described USB chip and exports digital baseband signal and Parallel Digital signal bit stream, and the output of described USB chip is connected output difference sub-signal with described USB interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520201437.1U CN204481976U (en) | 2015-04-07 | 2015-04-07 | A kind of data sampling apparatus for transmitter monitoring system |
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| CN201520201437.1U CN204481976U (en) | 2015-04-07 | 2015-04-07 | A kind of data sampling apparatus for transmitter monitoring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105306154A (en) * | 2015-09-25 | 2016-02-03 | 中国船舶重工集团公司第七二六研究所 | Emission detection unit based on FPGA (Field Programmable Gate Array) and implementation method thereof |
| CN112749119A (en) * | 2020-12-29 | 2021-05-04 | 无锡中微亿芯有限公司 | IP core for realizing ASI interface function based on FPGA resource |
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2015
- 2015-04-07 CN CN201520201437.1U patent/CN204481976U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105306154A (en) * | 2015-09-25 | 2016-02-03 | 中国船舶重工集团公司第七二六研究所 | Emission detection unit based on FPGA (Field Programmable Gate Array) and implementation method thereof |
| CN112749119A (en) * | 2020-12-29 | 2021-05-04 | 无锡中微亿芯有限公司 | IP core for realizing ASI interface function based on FPGA resource |
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