CN110475097B - Multi-parameter real-time monitoring platform - Google Patents
Multi-parameter real-time monitoring platform Download PDFInfo
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- CN110475097B CN110475097B CN201910076067.6A CN201910076067A CN110475097B CN 110475097 B CN110475097 B CN 110475097B CN 201910076067 A CN201910076067 A CN 201910076067A CN 110475097 B CN110475097 B CN 110475097B
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- humidity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
Abstract
The invention relates to a multi-parameter real-time monitoring platform, which comprises: the information source coder is used for receiving various service data of the ground mobile multimedia broadcast and respectively carrying out information source coding processing on the various service data; the conditional access scrambler is connected with the information source encoder and is used for executing conditional access scrambling processing on an output signal of the information source encoder; an energy spreader for performing an energy spreading process on the output signal of the conditional access scrambler to transmit the processed signal to the time interleaver. The multi-parameter real-time monitoring platform realizes the monitoring processing of each device of the information source processing end of the ground mobile multimedia broadcasting. The number of the pins of the current data output of the conditional access scrambler is determined, and whether other equipment which has data interaction relation with the conditional access scrambler needs to enter a working state with more data processed in unit time is determined, so that the communication mechanism of the equipment is optimized.
Description
Technical Field
The invention relates to the field of parameter monitoring, in particular to a multi-parameter real-time monitoring platform.
Background
Traditional analog closed-circuit vision monitoring Systems (CCTVs) rely on specialized equipment such as cameras, cables, video recorders, and monitors. For example, the camera outputs a video signal through a dedicated coaxial cable. The cable connects to dedicated analog video devices such as video frame splitters, matrix, switches, Video Cassette Recorders (VCRs), and video monitors.
Analog CCTV has a number of limitations: the limited monitoring capability only supports local monitoring and is limited by the transmission length of an analog video cable and a cable amplifier; limited scalability systems are typically limited by video picture dividers, matrices, and switcher input capacity; the user with heavy video load must take out or replace the new video tape from the video recorder for storage, and the video tape is easy to lose, steal or be erased unintentionally; the low video quality is the main limiting factor. Video quality decreases as the number of copies increases.
Disclosure of Invention
According to an aspect of the present invention, there is provided a multi-parameter real-time monitoring platform, the platform comprising: the information source coder is used for receiving various service data of the ground mobile multimedia broadcast and respectively carrying out information source coding processing on the various service data; and the conditional receiving scrambler is connected with the source encoder and is used for executing conditional receiving scrambling processing on an output signal of the source encoder.
More specifically, in the multi-parameter real-time monitoring platform, the platform further includes: and the energy diffuser is connected with the conditional access scrambler and used for performing energy diffusion processing on the output signal of the conditional access scrambler so as to send the processed signal to the time interleaver.
More specifically, in the multi-parameter real-time monitoring platform: in the source encoder, the service data items include audio service data, video service data and auxiliary service data.
More specifically, in the multi-parameter real-time monitoring platform, the platform further includes: the voice alarm equipment is connected with the data analysis equipment and used for receiving the internal humidity data and carrying out corresponding voice alarm operation when the internal humidity data is not in a preset humidity range; the voice alarm equipment comprises a signal analysis unit and a voice alarm chip, wherein the signal analysis unit is connected with the voice alarm chip.
More specifically, in the multi-parameter real-time monitoring platform, the platform further includes: the first detection equipment is arranged on the shell of the conditional access scrambler and used for carrying out field detection operation on the humidity on the shell of the conditional access scrambler to obtain first humidity data; the second detection equipment is arranged on the shell of the information source encoder and used for carrying out on-site detection operation on the humidity on the shell of the information source encoder so as to obtain second humidity data; the third detection device is arranged on the housing of the energy diffuser and used for carrying out on-site detection operation on the humidity on the housing of the energy diffuser so as to obtain third humidity data; and the data analysis equipment is respectively connected with the first detection equipment, the second detection equipment and the third detection equipment, and is used for receiving the first humidity data, the second humidity data and the third humidity data and executing weighted estimation operation on the first humidity data, the second humidity data and the third humidity data so as to obtain the internal humidity data of the conditional access scrambler.
The invention has the following two important points:
(1) determining whether other equipment having data interaction relation with the conditional access scrambler is necessary to enter a working state with more data processed in unit time according to the number of each pin of the conditional access scrambler, which has data output currently;
(2) a targeted equipment internal humidity measurement mechanism of the chip structure is established, and the defect that the traditional humidity measurement cannot be carried out due to the fact that the equipment structure of the chip structure is too small is overcome.
The multi-parameter real-time monitoring platform realizes the monitoring processing of each device of the information source processing end of the ground mobile multimedia broadcasting. The number of the pins of the current data output of the conditional access scrambler is determined, and whether other equipment which has data interaction relation with the conditional access scrambler needs to enter a working state with more data processed in unit time is determined, so that the communication mechanism of the equipment is optimized.
Detailed Description
The following will describe in detail an embodiment of the multi-parameter real-time monitoring platform of the present invention.
Scrambling is a processing method of digital signals, namely, a scrambling code is multiplied by an original signal, so that a new signal is obtained. The new signal is scattered in time and frequency compared to the original signal. Thus, scrambling is also a modulation technique in a broad sense. The scrambling also has an inverse operation, descrambling. Scrambling is the multiplication of a spreading code by a pseudorandom code sequence to encrypt the signal. Uplink physical channel scrambling serves to distinguish between users, and downlink scrambling can distinguish between cells and channels.
In UMTS, there are two types of applications for a codeword, the first type is referred to as channelization Code (CH) and the second type is Scrambling Code (SC). Due to different processing modes in uplink and downlink, the roles of the two types of code words are different. In the downlink (base station → mobile station direction), when the base station transmits information to the own cell, the base station first multiplies each user information by its own CH, superimposes the signals, multiplies the signals by the scrambling code, and transmits the signals over the air interface. The mobile station side descrambles and then resolves the useful information of the mobile station side. When the user information and the CH are multiplied, the CH is a spreading sequence, and the user information is distinguished by selecting the orthogonality of the CH. So the most basic role of the CH, whether it is uplink or downlink, is direct Spreading (Spreading), so the CH is a Spreading code. The spread rate is 3.84Mchip/s, then the scrambling code encryption process is carried out, and the scrambling code rate is also constant 3.84 Mchip/s.
Currently, whether other devices having a data interaction relationship with the conditional access scrambler need to enter a working state with more data processed in unit time or not cannot be determined according to the number of each pin of the conditional access scrambler, which currently has data output, so that data blocking or delaying is easy to occur during data interaction between the devices.
In order to overcome the defects, the invention builds a multi-parameter real-time monitoring platform, and can effectively solve the corresponding technical problem.
The multi-parameter real-time monitoring platform shown according to the embodiment of the invention comprises:
the information source coder is used for receiving various service data of the ground mobile multimedia broadcast and respectively carrying out information source coding processing on the various service data;
and the conditional receiving scrambler is connected with the source encoder and is used for executing conditional receiving scrambling processing on an output signal of the source encoder.
Next, the detailed structure of the multi-parameter real-time monitoring platform of the present invention will be further described.
The multi-parameter real-time monitoring platform may further include:
and the energy diffuser is connected with the conditional access scrambler and used for performing energy diffusion processing on the output signal of the conditional access scrambler so as to send the processed signal to the time interleaver.
In the multi-parameter real-time monitoring platform:
in the source encoder, the service data items include audio service data, video service data and auxiliary service data.
The multi-parameter real-time monitoring platform may further include:
the voice alarm equipment is connected with the data analysis equipment and used for receiving the internal humidity data and carrying out corresponding voice alarm operation when the internal humidity data is not in a preset humidity range;
the voice alarm equipment comprises a signal analysis unit and a voice alarm chip, wherein the signal analysis unit is connected with the voice alarm chip.
The multi-parameter real-time monitoring platform may further include:
the first detection equipment is arranged on the shell of the conditional access scrambler and used for carrying out field detection operation on the humidity on the shell of the conditional access scrambler to obtain first humidity data;
the second detection equipment is arranged on the shell of the information source encoder and used for carrying out on-site detection operation on the humidity on the shell of the information source encoder so as to obtain second humidity data;
the third detection device is arranged on the housing of the energy diffuser and used for carrying out on-site detection operation on the humidity on the housing of the energy diffuser so as to obtain third humidity data;
the data analysis equipment is respectively connected with the first detection equipment, the second detection equipment and the third detection equipment, and is used for receiving the first humidity data, the second humidity data and the third humidity data and executing weighted estimation operation on the first humidity data, the second humidity data and the third humidity data to obtain internal humidity data of the conditional access scrambler;
the FLASH storage equipment is connected with the instruction identification equipment and is used for pre-storing a preset quantity threshold value;
the quantity analysis equipment is connected with the conditional access scrambler and used for counting the quantity of each pin of the conditional access scrambler, which has data output currently, so as to be used as instant pin quantity output;
the instruction identification device is connected with the quantity analysis device and used for receiving the instant pin quantity, sending a first control instruction when the instant pin quantity is more than two times of a preset quantity threshold value, sending a second control instruction when the instant pin quantity is more than one time of the preset quantity threshold value, and sending a third control instruction when the instant pin quantity is less than the preset quantity threshold value;
the instruction identification device comprises a data receiving unit and an instruction analyzing unit, wherein the data receiving unit is connected with the instruction analyzing unit;
the ARM11 processing chip is respectively connected with the conditional access scrambler, the information source encoder, the energy diffuser and the instruction identification device and is used for controlling the information source encoder to enter a working state and simultaneously controlling the energy diffuser to enter the working state when receiving the first control instruction;
wherein, in the data analysis apparatus, performing a weighted estimation operation on the first humidity data, the second humidity data, and the third humidity data to obtain internal humidity data of the conditional access scrambler comprises: multiplying the first humidity data and a first weight value to obtain a first product, multiplying the second humidity data and a second weight value to obtain a second product, multiplying the third humidity data and a third weight value to obtain a third product, and adding the first product, the second product, and the third product to obtain the internal humidity data;
the first weight value is greater than the second weight value and greater than the third weight value, the value range of the first weight value is between 0.5 and 2, and the value ranges of the second weight value and the third weight value are between 0.25 and 1;
the ARM11 processing chip is further used for controlling the information source encoder to enter a working state and controlling the energy diffuser to enter a safe state when receiving the second control instruction;
the ARM11 processing chip is further used for controlling the source encoder to enter a safe state and simultaneously controlling the energy diffuser to enter the safe state when receiving the third control instruction.
In the multi-parameter real-time monitoring platform:
for any one of the conditional access scrambler, the source encoder and the energy spreader, the amount of data processed per unit time in the security state is smaller than the amount of data processed per unit time in the working state.
The multi-parameter real-time monitoring platform may further include:
and the optical fiber communication interface is connected with the conditional access scrambler and is used for transmitting the current transmission data of the conditional access scrambler through an optical fiber communication line.
In the multi-parameter real-time monitoring platform:
the conditional access scrambler and the information source encoder are respectively realized by SOC chips with different models, and are integrated on the same printed circuit board.
The multi-parameter real-time monitoring platform may further include:
and the temperature sensing equipment is respectively connected with the conditional access scrambler and the information source encoder and is used for respectively detecting the shell temperatures of the conditional access scrambler and the information source encoder.
In addition, the optical fiber is a short term for optical fiber, and is a fiber made of glass or plastic, which can be used as a light transmission means. The principle of transmission is 'total reflection of light'. The fine optical fiber is enclosed in a plastic sheath so that it can be bent without breaking. Generally, a Light Emitting Diode (LED) or a laser beam is used as a transmitter at one end of the optical fiber to transmit an optical pulse to the optical fiber, and a photosensor is used as a receiver at the other end of the optical fiber to detect the pulse.
In the multimode optical fiber, the core diameter is 50 μm and 62.5 μm, which are approximately equivalent to the thickness of human hair. Whereas the diameter of the single-mode optical fiber core is 8 μm to 10 μm, 9/125 μm is generally used. The core is surrounded by a glass envelope, commonly referred to as a cladding, of lower refractive index than the core, which keeps the light rays within the core. Further on the outside is a thin plastic outer jacket, i.e. a coating, for protecting the cladding. The optical fibers are typically bundled and protected by an outer jacket. The core is usually a double-walled concentric cylinder of silica glass with a small cross-sectional area, which is brittle and easily broken, and therefore requires the addition of a protective layer.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Although the present invention has been described with reference to the above embodiments, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims of the present application.
Claims (3)
1. A multi-parameter real-time monitoring platform, comprising:
the information source coder is used for receiving various service data of the ground mobile multimedia broadcast and respectively carrying out information source coding processing on the various service data;
the conditional access scrambler is connected with the information source encoder and is used for executing conditional access scrambling processing on an output signal of the information source encoder;
an energy diffuser connected to the conditional access scrambler and configured to perform energy diffusion processing on an output signal of the conditional access scrambler to transmit the processed signal to a time interleaver;
in the source encoder, the service data items comprise audio service data, video service data and auxiliary service data;
the voice alarm equipment is connected with the data analysis equipment and used for receiving the internal humidity data and carrying out corresponding voice alarm operation when the internal humidity data is not in a preset humidity range;
the voice alarm equipment comprises a signal analysis unit and a voice alarm chip, wherein the signal analysis unit is connected with the voice alarm chip;
the first detection equipment is arranged on the shell of the conditional access scrambler and used for carrying out field detection operation on the humidity on the shell of the conditional access scrambler to obtain first humidity data;
the second detection equipment is arranged on the shell of the information source encoder and used for carrying out on-site detection operation on the humidity on the shell of the information source encoder so as to obtain second humidity data;
the third detection device is arranged on the housing of the energy diffuser and used for carrying out on-site detection operation on the humidity on the housing of the energy diffuser so as to obtain third humidity data;
the data analysis equipment is respectively connected with the first detection equipment, the second detection equipment and the third detection equipment, and is used for receiving the first humidity data, the second humidity data and the third humidity data and executing weighted estimation operation on the first humidity data, the second humidity data and the third humidity data to obtain internal humidity data of the conditional access scrambler;
the FLASH storage equipment is connected with the instruction identification equipment and is used for pre-storing a preset quantity threshold value;
the quantity analysis equipment is connected with the conditional access scrambler and used for counting the quantity of each pin of the conditional access scrambler, which has data output currently, so as to be used as instant pin quantity output;
the instruction identification device is connected with the quantity analysis device and used for receiving the instant pin quantity, sending a first control instruction when the instant pin quantity is more than two times of a preset quantity threshold value, sending a second control instruction when the instant pin quantity is more than one time of the preset quantity threshold value, and sending a third control instruction when the instant pin quantity is less than the preset quantity threshold value;
the instruction identification device comprises a data receiving unit and an instruction analyzing unit, wherein the data receiving unit is connected with the instruction analyzing unit;
the ARM11 processing chip is respectively connected with the conditional access scrambler, the information source encoder, the energy diffuser and the instruction identification device and is used for controlling the information source encoder to enter a working state and simultaneously controlling the energy diffuser to enter the working state when receiving the first control instruction;
wherein, in the data analysis apparatus, performing a weighted estimation operation on the first humidity data, the second humidity data, and the third humidity data to obtain internal humidity data of the conditional access scrambler comprises: multiplying the first humidity data and a first weight value to obtain a first product, multiplying the second humidity data and a second weight value to obtain a second product, multiplying the third humidity data and a third weight value to obtain a third product, and adding the first product, the second product, and the third product to obtain the internal humidity data;
the first weight value is greater than the second weight value and greater than the third weight value, the value range of the first weight value is between 0.5 and 2, and the value ranges of the second weight value and the third weight value are between 0.25 and 1;
the ARM11 processing chip is further used for controlling the information source encoder to enter a working state and controlling the energy diffuser to enter a safe state when receiving the second control instruction;
the ARM11 processing chip is further used for controlling the source encoder to enter a safe state and simultaneously controlling the energy diffuser to enter the safe state when receiving the third control instruction;
for any one of the conditional access scrambler, the source encoder and the energy diffuser, the data volume processed in unit time under the safety state is smaller than the data volume processed in unit time under the working state;
and the optical fiber communication interface is connected with the conditional access scrambler and is used for transmitting the current transmission data of the conditional access scrambler through an optical fiber communication line.
2. The multi-parameter real-time monitoring platform of claim 1, wherein:
the conditional access scrambler and the information source encoder are respectively realized by SOC chips with different models, and are integrated on the same printed circuit board.
3. The multi-parameter real-time monitoring platform of claim 2, wherein the platform further comprises:
and the temperature sensing equipment is respectively connected with the conditional access scrambler and the information source encoder and is used for respectively detecting the shell temperatures of the conditional access scrambler and the information source encoder.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0831648A3 (en) * | 1996-09-18 | 1998-04-08 | Sony Corporation | Copy protection in data transmission and processing |
| CN101022440A (en) * | 2006-03-30 | 2007-08-22 | 鲍东山 | Compatiable DAB ground mobile multimedia broadcast receiving and transmitting method and system |
| CN205610840U (en) * | 2016-04-22 | 2016-09-28 | 南京睿高宇信息科技有限公司 | Signal quality monitoring device that has line number word TV radiofrequency signal |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0831648A3 (en) * | 1996-09-18 | 1998-04-08 | Sony Corporation | Copy protection in data transmission and processing |
| CN101022440A (en) * | 2006-03-30 | 2007-08-22 | 鲍东山 | Compatiable DAB ground mobile multimedia broadcast receiving and transmitting method and system |
| CN205610840U (en) * | 2016-04-22 | 2016-09-28 | 南京睿高宇信息科技有限公司 | Signal quality monitoring device that has line number word TV radiofrequency signal |
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Denomination of invention: Multi parameter real-time monitoring platform Effective date of registration: 20211019 Granted publication date: 20200522 Pledgee: Yuhuan Branch of China Construction Bank Co.,Ltd. Pledgor: ZHEJIANG ZHIJIAN TECHNOLOGY Co.,Ltd. Registration number: Y2021330001955 |