CN102547745B - Frequency control method and device of wireless video monitoring system - Google Patents
Frequency control method and device of wireless video monitoring system Download PDFInfo
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- CN102547745B CN102547745B CN201210014418.9A CN201210014418A CN102547745B CN 102547745 B CN102547745 B CN 102547745B CN 201210014418 A CN201210014418 A CN 201210014418A CN 102547745 B CN102547745 B CN 102547745B
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Abstract
The invention discloses a frequency control method of a wireless video monitoring system, which comprises the steps of: obtaining a working frequency of a rear end commanding center receiving unit; sending a working frequency correction instruction to a front end communication device sending unit according to the obtained working frequency of the rear end commanding center receiving unit; and regulating the working frequency of the front end communication device sending unit according to the sent working frequency correction instruction. In addition, the invention discloses a frequency control device of the wireless video monitoring system, which comprises a working frequency obtaining module, a rear end sending module and a front end control module. According to the frequency control method and device of the wireless video monitoring system, provided by the invention, through controlling the working frequency of a front end communication device, the condition that a rear end commanding center must adopt same frequency points as the front end communication device in a one-to-one correspondence manner is avoided, so that the quantity of the rear end commanding center receiving units for receiving video monitoring information and occupied frequency resources are greatly reduced.
Description
Technical field
The present invention relates to wireless video monitoring technical field, relate in particular to a kind of wireless video monitoring system control method for frequency and device.
Background technology
In wireless video monitoring system, the bandwidth that transmission of video takies is larger at present, and front end video transmitting element adopts fixed frequency point, and backstage command centre receiving element must adopt the Frequency point identical with front end communication equipment transmitting element.If wireless video monitoring system has a plurality of front end transmitting elements, it is corresponding that must there be the receiving element of equal number rear end, and must adopt correspondingly same frequency.When wireless video monitoring system is larger, system will take a lot of frequency resources, for example, when system comprises 10 video monitoring front-end unit, just need to take 10 Frequency points, rear end will have 10 receiving elements accordingly simultaneously, and 10 secondary reception antennas.Therefore, current wireless video monitoring system exists that complex structure, construction cost are high, frequency resource takies many and be disturbed the unfavorable factors such as probability increase.
Summary of the invention
The said structure complexity and the many problems of acquisition frequency resource that for solving wireless video monitoring system, exist, the invention discloses a kind of wireless video monitoring system control method for frequency and device.
A wireless video monitoring system control method for frequency, comprises the following steps:
Obtain the operating frequency of rear end command centre receiving element;
According to the operating frequency of the rear end command centre receiving element obtaining, forward end communication equipment transmitting element sends operating frequency modify instruction;
According to the operating frequency modify instruction sending, adjust the operating frequency of front end communication equipment transmitting element; Wherein, when the video information of the described front end communication equipment of monitoring, the operating frequency of described front end communication equipment transmitting element is adjusted into the operating frequency identical with described rear end command centre receiving element; When not monitoring the video information of described front end communication equipment, the operating frequency of described front end communication equipment transmitting element is adjusted into the operating frequency different from described rear end command centre receiving element.
Compared with prior art, wireless video monitoring system control method for frequency provided by the present invention, by the control to front end communication equipment operating frequency, avoided rear end command centre to adopt correspondingly the situation of same frequency point with front end communication equipment, rear end command centre is reduced greatly for the receiving element quantity of receiver, video monitor message and shared frequency resource.Particularly, when system scale is larger, while having more front end communication equipment, can effectively reduce system scale and the construction cost of rear end command centre, improve the service efficiency of frequency resource.
A wireless video monitoring system frequency control apparatus, comprises operating frequency acquisition module, rear end sending module and front-end control module;
Described operating frequency acquisition module, for obtaining the operating frequency of rear end command centre receiving element;
Described rear end sending module, the operating frequency of the rear end command centre receiving element obtaining for basis, forward end communication equipment transmitting element sends operating frequency modify instruction;
Described front-end control module, for according to the operating frequency modify instruction sending, adjusts the operating frequency of front end communication equipment transmitting element; Wherein, when the video information of the described front end communication equipment of monitoring, the operating frequency of described front end communication equipment transmitting element is adjusted into the operating frequency identical with described rear end command centre receiving element; When not monitoring the video information of described front end communication equipment, the operating frequency of described front end communication equipment transmitting element is adjusted into the operating frequency different from described rear end command centre receiving element.
Compared with prior art, wireless video monitoring system frequency control apparatus provided by the present invention, can realize the control to front end communication equipment operating frequency, and the receiving element quantity of rear end command centre and shared frequency resource are all reduced greatly.
Accompanying drawing explanation
Fig. 1 is the schematic flow diagram of wireless video monitoring system control method for frequency of the present invention;
Fig. 2 is the structural representation of wireless video monitoring system frequency control apparatus of the present invention.
Embodiment
For further setting forth the technological means that the present invention takes and the effect obtaining, below in conjunction with accompanying drawing and preferred embodiment, to wireless video monitoring system control method for frequency proposed by the invention and the technical scheme of device, know and complete description.
Referring to Fig. 1, is the schematic flow diagram of wireless video monitoring system control method for frequency of the present invention.Wireless video monitoring system control method for frequency of the present invention comprises the following steps:
S101 obtains the operating frequency of rear end command centre receiving element;
Front end communication equipment transmitting element adopts alien frequencies, and each front end communication equipment transmitting element of wireless video monitoring system adopts different frequencies, but must be corresponding with the frequency of rear end command centre receiving element.For front end communication equipment transmitting element is carried out to FREQUENCY CONTROL, need first obtain the operating frequency of rear end command centre receiving element.
Formulate the communication protocol of wireless video monitoring system, make together with rear end command centre passes through wireless network organic connections with front end communication equipment.Communication protocol is the important component part that realizes FREQUENCY CONTROL, and communicating by letter between rear end command centre and front end communication equipment must meet the requirement of these stipulations, can complete the parameter modifications such as FREQUENCY CONTROL.The structure of communication protocol comprises the contents such as the address, command word, command context, verification, frame end position of start of frame bits, front end communication equipment transmitting element.
Communication protocol comprises system queries and system arranges two parts.System queries can be inquired about the information such as the operating state, coding mode, communication frequency of a certain front end communication equipment, and rear end command centre obtains the operating state of a certain front end communication equipment by query statement, to do the scheduling of more optimizing.System setting can be revised working channel, the operating frequency of a certain front end communication equipment, the parameters such as power of transmitting element.
S102 is according to the operating frequency of the rear end command centre receiving element obtaining, and forward end communication equipment transmitting element sends operating frequency modify instruction;
After having obtained the operating frequency of rear end command centre receiving element, in the time need to revising the operating frequency of a certain front end communication equipment transmitting element, rear end command centre approximately sends an instruction of revising the front end communication equipment transmitting element operating frequency of a certain address according to system specifications.
Preferably, before rear end command centre forward end communication equipment transmitting element sends operating frequency modify instruction, rear end command centre needs first the operating state of this front end communication equipment transmitting element to be inquired about.When the state parameters such as operating frequency of a certain front end communication equipment transmitting element need to be inquired about by rear end command centre, according to system specifications, send the instruction of the front end communication equipment transmitting element working status parameter of an a certain address of inquiry, front end communication equipment is converted to operating state query statement after the form that is suitable for the identification of front end communication equipment transmitting element, and the working status parameter of front end communication equipment transmitting element is sent to rear end command centre receiving element.
S103, according to the operating frequency modify instruction sending, adjusts the operating frequency of front end communication equipment transmitting element; Wherein, when the video information of the described front end communication equipment of monitoring, the operating frequency of described front end communication equipment transmitting element is adjusted into the operating frequency identical with described rear end command centre receiving element; When not monitoring the video information of described front end communication equipment, the operating frequency of described front end communication equipment transmitting element is adjusted into the operating frequency different from described rear end command centre receiving element.
Preferably, front end communication equipment is converted to operating frequency modify instruction the form that is suitable for the identification of front end communication equipment transmitting element, according to the operating frequency modify instruction after format conversion, adjusts the operating frequency of front end communication equipment transmitting element.
Rear end command centre is according to the needs of command scheduling, while needing the video information of a certain front end communication equipment of key monitoring, this front end communication priority facility is for the highest, now the identical operating frequency of frequency remotely modifying Wei Yu rear end command centre's receiving element of this front end communication equipment transmitting element.When command centre temporarily does not need to monitor the video information of a certain front end communication equipment, this front end communication priority facility is minimum, now being set to the operating frequency different from rear end command centre receiving element the frequency of this front end communication equipment transmitting element is long-range, is also reserve frequency.
Preferably, if the operating frequency of the front end communication equipment transmitting element after adjusting is identical with the operating frequency of rear end command centre receiving element, front end communication equipment transmitting element is sent to rear end command centre receiving element by video information; If the operating frequency of the front end communication equipment transmitting element after adjusting is different from the operating frequency of rear end command centre receiving element, store the video information that front end communication equipment gathers.
Compared with prior art, wireless video monitoring system control method for frequency provided by the present invention, by the control to front end communication equipment transmitting element operating frequency, avoided rear end command centre receiving element to adopt correspondingly the situation of same frequency point with front end communication equipment transmitting element, the quantity of rear end receiving element and shared frequency resource are reduced greatly.Particularly, when system scale is larger, while having more front end communication equipment, can effectively reduce back-end system scale and construction cost, improve the service efficiency of frequency resource.
Referring to Fig. 2, is the structural representation of wireless video monitoring system frequency control apparatus of the present invention.Wireless video monitoring system frequency control apparatus of the present invention, comprises operating frequency acquisition module 201, rear end sending module 202 and front-end control module 203;
Described operating frequency acquisition module 201, for obtaining the operating frequency of rear end command centre receiving element;
For front end communication equipment transmitting element is carried out to FREQUENCY CONTROL, operating frequency acquisition module 201 need first obtain the operating frequency of rear end command centre receiving element.
Described rear end sending module 202, the operating frequency of the rear end command centre receiving element obtaining for basis, forward end communication equipment transmitting element sends operating frequency modify instruction;
After having obtained the operating frequency of rear end command centre receiving element, in the time need to revising the operating frequency of a certain front end communication equipment transmitting element, rear end sending module 202 approximately sends an instruction of revising the front end communication equipment transmitting element operating frequency of a certain address according to system specifications.
Preferably, described rear end sending module 202 also sends operating state query statement for forward end communication equipment transmitting element.
Described front-end control module 203, for according to the operating frequency modify instruction sending, adjusts the operating frequency of front end communication equipment transmitting element; Wherein, when the video information of the described front end communication equipment of monitoring, the operating frequency of described front end communication equipment transmitting element is adjusted into the operating frequency identical with described rear end command centre receiving element; When not monitoring the video information of described front end communication equipment, the operating frequency of described front end communication equipment transmitting element is adjusted into the operating frequency different from described rear end command centre receiving element.
Preferably, described front-end control module 203 comprises instruction transformation module, and described instruction transformation module is for being converted to operating frequency modify instruction the form that is suitable for the identification of front end communication equipment transmitting element.Front end communication equipment receives after operating frequency modify instruction, front-end control module 203 is the command format that front end communication equipment transmitting element can be identified by instruction transformation module by instruction transformation, front end communication equipment transmitting element carries out frame format verification to instruction and changes its operating frequency after errorless, now to become standby, new operating frequency be operating frequency to former operating frequency.
Preferably, described front-end control module 203 is the operating state query statement for sending according to rear end sending module 202 also, by instruction transformation module, operating state query statement is converted to the form that is suitable for the identification of front end communication equipment transmitting element.Front end communication equipment transmitting element to query statement carry out frame format verification errorless after, working status parameter is sent to rear end command centre receiving element.
Between described front-end control module 203 and front end communication equipment transmitting element, by RS232 interface, be connected.Preferably, if the operating frequency of the front end communication equipment transmitting element after adjusting is identical with the operating frequency of rear end command centre receiving element, front end communication equipment transmitting element is sent to rear end command centre receiving element by video information; If the operating frequency of the front end communication equipment transmitting element after adjusting is different from the operating frequency of rear end command centre receiving element, described front-end control module 203 also can be further used for storing the video information that front end communication equipment gathers.
Described front-end control module 203 has been important component parts of front end FREQUENCY CONTROL, and as a kind of preferred embodiment, it can be comprised of CPU, communication interface, memory, control software etc., and its effect has: the interface of communication and the conversion of communication instruction; Logic control, carries out the scheduling decision of rear end command centre; Information storage, does not temporarily store during the video information of receiving front-end communication equipment in command centre, when communication recovery, again the information of not transmission is sent to rear end command centre.
In wireless video monitoring system, front end communication equipment transmitting element can preset a plurality of channels, as preset 10 channels, and Frequency point of each channel allocation.During work, only have a channel effective, other channels are invalid.While dispatching from the factory, channel one is the working channel of acquiescence, and other channels are standby channels.
Above-described embodiment of the present invention, does not form limiting the scope of the present invention.Any modification of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in claim protection range of the present invention.
Claims (10)
1. a wireless video monitoring system control method for frequency, is characterized in that, comprises the following steps:
Obtain the operating frequency of rear end command centre receiving element;
According to the operating frequency of the rear end command centre receiving element obtaining, forward end communication equipment transmitting element sends operating frequency modify instruction;
According to the operating frequency modify instruction sending, adjust the operating frequency of front end communication equipment transmitting element; Wherein, when the video information of the described front end communication equipment of monitoring, the operating frequency of described front end communication equipment transmitting element is adjusted into the operating frequency identical with described rear end command centre receiving element; When not monitoring the video information of described front end communication equipment, the operating frequency of described front end communication equipment transmitting element is adjusted into the operating frequency different from described rear end command centre receiving element.
2. wireless video monitoring system control method for frequency as claimed in claim 1, is characterized in that, described according to the operating frequency modify instruction sending, and the step of adjusting the operating frequency of front end communication equipment transmitting element comprises the following steps:
Operating frequency modify instruction is converted to the form that is suitable for the identification of front end communication equipment transmitting element;
According to the operating frequency modify instruction after format conversion, adjust the operating frequency of front end communication equipment transmitting element.
3. wireless video monitoring system control method for frequency as claimed in claim 1, is characterized in that, before sending the step of operating frequency modify instruction, comprises the following steps at described forward end communication equipment transmitting element:
Forward end communication equipment transmitting element sends operating state query statement;
Operating state query statement is converted to the form that is suitable for the identification of front end communication equipment transmitting element;
According to the operating state query statement after format conversion, the working status parameter of front end communication equipment transmitting element is sent to rear end command centre receiving element.
4. wireless video monitoring system control method for frequency as claimed in claim 1, is characterized in that, described, according to the operating frequency modify instruction sending, after the step of the operating frequency of adjustment front end communication equipment transmitting element, comprises the following steps:
If the operating frequency of the front end communication equipment transmitting element after adjusting is identical with the operating frequency of rear end command centre receiving element, front end communication equipment transmitting element is sent to rear end command centre receiving element by video information;
If the operating frequency of the front end communication equipment transmitting element after adjusting is different from the operating frequency of rear end command centre receiving element, store video information.
5. a wireless video monitoring system frequency control apparatus, is characterized in that, comprises operating frequency acquisition module, rear end sending module and front-end control module;
Described operating frequency acquisition module, for obtaining the operating frequency of rear end command centre receiving element;
Described rear end sending module, the operating frequency of the rear end command centre receiving element obtaining for basis, forward end communication equipment transmitting element sends operating frequency modify instruction;
Described front-end control module, for according to the operating frequency modify instruction sending, adjusts the operating frequency of front end communication equipment transmitting element; Wherein, when the video information of the described front end communication equipment of monitoring, the operating frequency of described front end communication equipment transmitting element is adjusted into the operating frequency identical with described rear end command centre receiving element; When not monitoring the video information of described front end communication equipment, the operating frequency of described front end communication equipment transmitting element is adjusted into the operating frequency different from described rear end command centre receiving element.
6. wireless video monitoring system frequency control apparatus as claimed in claim 5, is characterized in that, described front-end control module comprises instruction transformation module;
Described instruction transformation module is for being converted to operating frequency modify instruction the form that is suitable for the identification of front end communication equipment transmitting element.
7. wireless video monitoring system frequency control apparatus as claimed in claim 5, is characterized in that, described rear end sending module also sends operating state query statement for forward end communication equipment transmitting element.
8. wireless video monitoring system frequency control apparatus as claimed in claim 7, it is characterized in that, described front-end control module is the operating state query statement for sending according to rear end sending module also, and the working status parameter of front end communication equipment transmitting element is sent to rear end command centre receiving element.
9. wireless video monitoring system frequency control apparatus as claimed in claim 6, is characterized in that, described instruction transformation module is also for being converted to operating state query statement the form that is suitable for the identification of front end communication equipment transmitting element.
10. wireless video monitoring system frequency control apparatus as claimed in claim 5, is characterized in that, described front-end control module is also for store video information.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210014418.9A CN102547745B (en) | 2012-01-16 | 2012-01-16 | Frequency control method and device of wireless video monitoring system |
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| CN201210014418.9A CN102547745B (en) | 2012-01-16 | 2012-01-16 | Frequency control method and device of wireless video monitoring system |
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| CN102547745A CN102547745A (en) | 2012-07-04 |
| CN102547745B true CN102547745B (en) | 2014-10-01 |
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| CN103916631A (en) * | 2014-03-14 | 2014-07-09 | 上海交通大学 | Mobile video monitoring system based on cognitive radio and method thereof |
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| US8248203B2 (en) * | 2008-09-15 | 2012-08-21 | Martin James Hanwright | Remote monitor/control for billboard lighting or standby power system |
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| CN1750649A (en) * | 2005-10-21 | 2006-03-22 | 北京中星微电子有限公司 | Wired and wireless two-in-one camera head |
| CN101764997A (en) * | 2008-12-25 | 2010-06-30 | 联创汽车电子有限公司 | Vehicle monitoring system |
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