CN101355690B - Additional device and main switching device for remote monitoring system as well as preprocessing method - Google Patents
Additional device and main switching device for remote monitoring system as well as preprocessing method Download PDFInfo
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Abstract
In a remote monitoring system of the invention, a plurality of additional devices correspond to one main switching device, so that a plurality of computers provided with additional devices can be remotely monitored. The additional device comprises a difference driving unit, a microprocessor, a length measurement signal source and a pre-processing circuit; the main switching device comprises an OSD, a difference receiving unit and an FPGA; in order to lower the complexity and the cost of the additional devices, the pre-processing circuit only performs signal polarity detection(namely a horizontal and vertical synchronizing signal polarity detection unit), polarity conversion(namely a horizontal and vertical synchronizing signal polarity conversion unit) and the measurement line length 8MHzpulse control(namely a vertical synchronizing signal taking-out unit), and the relatively complex processing work is all concentrated to the FPGA(namely a horizontal synchronizing signal taking-out unit, a vertical synchronizing signal polarity recovering unit, a combined signal detection unit, a vertical synchronizing signal taking-out unit, a vertical synchronizing signal removing unit, a burr removing unit and a switching unit) of the main switching device.
Description
Technical field
The present invention relates to a kind ofly, refer to attachment device and main switching device shifter in long distance control system especially in long distance control system.
Background technology
Increasing along with machine density, value volume and range of product is various, and to cause management to be gone up more and more difficult because of factors such as circuit are numerous and diverse.Therefore, enterprise is badly in need of an energy centralized control, alleviates the computer lab management difficulty, increases work efficiency, and eliminates the Operational Management System of various artificial potential safety hazards.So, be pushed out one after another about the product of KVM.
KVM is the abbreviation of keyboard (Keyboard), display device (Video), mouse (Mouse), claims switch again.The KVM switched system then is meant the management equipment of Network of Workstation.KVM by keyboard, mouse and image output device are done suitable configuration and between different main frames the switching of multiple mode connect, and can abandon unnecessary keyboard, monitor and mouse, save machine room area, reduce energy resource consumption, also simplify simultaneously the operational administrative pattern of machine room, improve the operating efficiency of management maintenance, promoted the fail safe and the reliability of management.
In known KVM switching device shifter, the cable between control end (or operating side of title user), a plurality of arithmetic unit end (for example PC) is mainly used to transmission video signal (can demonstrate picture on display unit), control signal (by sending as input units such as keyboard, mouses).This makes, when the user switches to the certain operations device end by the switch bar (not describing) of KVM, the user just can see the picture of the vision signal representative of arithmetic unit end from display unit, also can pass through keyboard, the specific arithmetic unit end of the direct remote operation of mouse simultaneously.
Between control end, the arithmetic unit end longer distance is arranged in order to allow, above-mentioned cable can adopt the CAT5 cable, and also adopts relative changing the mechanism to carry out conversion program at the KVM switching device shifter.In CAT5KVM, respectively and control end (including single main switching device shifter), arithmetic unit end carry out (including attachment device (dongle)) keyboard, mouse, state and control signal communication be UART Universal Asynchronous Receiver Transmitter (Universal Asynchronous Receiver/Transmitter, UART).If with the structure of UART, can roughly be divided into direct attachment type and this two big class of scanning switch type.
In direct attachment type UART structure, the KVM switch all directly connects all pc ports (being the arithmetic unit end) and control end port separately with the UART of relative populations.For instance, if when 32 PC, 4 control ends are arranged, KVM needs 36 UART.
The KVM switch of direct attachment type UART structure, biggest advantage are that the transmission of signal, state is real-time fully, and when for example a PC module was activated, its state can inform the KVM switch immediately.But the hardware structure of this class KVM switch must be along with the quantity of the PC that is connected, control end, and use more UART.Simultaneously, under this framework, the KVM switch must be handled control and the data of all UART simultaneously, and this makes that when connectivity port quantity was big more, the CPU that more relies on the price noble quality handled.Therefore, the KVM switch of the direct attachment type UART structure KVM switch that slowly is scanned switch type replaces.
As U.S. Patent number is in the mentioned CAT 5KVM switch system of 6345323 patent, is installed in the attachment device (dongle) of arithmetic unit end, and it consists predominantly of differential driving unit, microprocessor, linear measure longimetry signal source, pre-process circuit.
Attachment device has roughly been handled image and these two parts of control signal.Part about image processing, mainly be to utilize the differential driving unit to convert rgb signal to differential signal transmission, and take three couples of CAT 5 (category-5 cable) four centerings, but H, V signal oppositely be superimposed on two signals in the rgb signal, not the outer CAT5 line of occupying volume.In control signal, then utilize remaining a pair of line and adopt differential transfer, be used for transmitting digital signal, this signal comprises keyboard and mouse order, inter-module communication letter and digitized audio signal etc.For the reference signal of measuring as line length, also can utilize the linear measure longimetry signal source to send a 8Mhz signal, and this signal and V signal exist synchronously and in the V signal valid period.When transmission 8Mhz signal, it oppositely can be superimposed in the remaining one group of signal of RGB, perhaps transmit by the digital communication signal line.
For H, V signal oppositely are superimposed in the rgb signal, also need to handle from the signal of horizontal-drive signal (H-sync) in the differential driving unit by pre-process circuit earlier with vertical synchronizing signal (V-sync) terminal.This be because, because the combination polarity of H, V has a variety of, and differential transfer finally will be with H, the V of positive polarity, so CPU must be first learn the original polarity of H, V and be transferred to long-rangely by UART by pre-process circuit, just long-range H, V is returned to original polarity then.
In general, to have comprised the signal polarity detection (be horizontal-drive signal (H-sync) polarity detecting unit to the pre-process circuit in the attachment device, vertical synchronizing signal (V-sync) polarity detecting unit), polar switching (is horizontal-drive signal (H-sync) polarization converting unit, vertical synchronizing signal (V-sync) polarization converting unit), measure line length 8Mhz pulse control (being vertical synchronizing signal (V-sync) retrieval unit), and in order to handle the composite signal detecting unit of HV composite signal, vertical synchronizing signal (V-sync) retrieval unit, vertical synchronizing signal (V-sync) is removed the unit, burr is removed unit or the like.
Yet, must discern, handle multiple HV combination at pre-process circuit traditionally, therefore traditional pre-process circuit is more complicated all, part is more, because attachment device (dongle) is one of a PC, therefore complicated attachment device (dongle) circuit brings is that the cost of whole KVM system increases.In addition, because to the processing of HV composite signal too much, gate leve postpones bigger to the HV effect of signals here, thereby make problems such as the VGA image produces skew, shakes even can't normally show on some LCD.
Summary of the invention
Main purpose of the present invention is providing a kind of attachment device and main switching device shifter in long distance control system, it mainly concentrates on single main switching device shifter all by the processing with the HV composite signal, and do not consider the influence of HV composite signal at many attachment devices, to reach the cost that significantly reduces whole long distance control system.
Based on above-mentioned purpose, in long distance control system of the present invention, many attachment devices correspond to single main switching device shifter, make many computers with attachment device be able to by remote monitoring.Attachment device includes differential driving unit, microprocessor, linear measure longimetry signal source, pre-process circuit.Main switching device shifter comprises OSD, differential received unit and FPGA.For complexity and the cost that reduces attachment device, it (is horizontal-drive signal (H-sync) polarity detecting unit that the signal polarity of only doing pre-process circuit detects, vertical synchronizing signal (V-sync) polarity detecting unit), polar switching (is horizontal-drive signal (H-sync) polarization converting unit, and the FPGA that will all concentrate in the main switching device shifter than complex process work (is horizontal-drive signal (H-sync) polarity recovery unit vertical synchronizing signal (V-sync) polarization converting unit) and measure line length 8Mhz pulse control (being vertical synchronizing signal (V-sync) retrieval unit),, vertical synchronizing signal (V-sync) polarity recovery unit, the composite signal detecting unit, vertical synchronizing signal (V-sync) retrieval unit, vertical synchronizing signal (V-sync) is removed the unit, burr is removed the unit, switch unit).
Can be about the advantages and spirit of the present invention by following detailed Description Of The Invention and appended graphic being further understood.
Description of drawings
Fig. 1 is the schematic diagram of attachment device of the present invention;
Fig. 2 is the schematic diagram of pre-process circuit of the present invention;
Fig. 3 is the schematic diagram of master's switching device shifter of the present invention.
Among the figure,
10 computers
12 attachment devices
14 cables
16 differential driving unit
18 pre-process circuits
20 linear measure longimetry signal sources
22 microprocessors (CPU)
24 communicating circuits
26 power supplys
28 horizontal-drive signals (H-sync) polarization converting unit
30 horizontal-drive signals (H-sync) polarity detecting unit
34 vertical synchronizing signals (V-sync) polarity detecting unit
36 vertical synchronizing signals (V-sync) retrieval unit
The 38OR logic
40 main switching device shifters
42FPGA
44 differential received unit
46 composite signal detecting units
48 vertical synchronizing signals (V-sync) retrieval unit
50 horizontal-drive signals (H-sync) polarity recovery unit
52 vertical synchronizing signals (V-sync) polarity recovery unit
54 vertical synchronizing signals (V-sync) are removed the unit
56 burrs are removed the unit
58OSD
60 display unit
62 switch units
Embodiment
In long distance control system of the present invention, many attachment devices 12 (as shown in Figure 1) correspond to single main switching device shifter 40 (as shown in Figure 3), make many computers 10 with attachment device 12 be able to by remote monitoring.
See also Fig. 1, Fig. 1 is the schematic diagram of attachment device of the present invention.As shown in Figure 1, attachment device 12 of the present invention consists predominantly of differential driving unit 16, microprocessor (CPU) 22, linear measure longimetry signal source 20, pre-process circuit 18.Offer the usefulness that CPU22 does external communication as for 24 of communicating circuits, power supply 26 then provides power supply to said modules.
See also Fig. 2, Fig. 2 is the schematic diagram of pre-process circuit of the present invention.Pre-process circuit 18 comprises horizontal-drive signal (H-sync) polarity detecting unit 32, vertical synchronizing signal (V-sync) polarity detecting unit 34, horizontal-drive signal (H-sync) polarization converting unit 28, vertical synchronizing signal (V-sync) polarization converting unit 30, vertical synchronizing signal (V-sync) retrieval unit 36, OR logic 38.
But, for complexity and the cost that reduces attachment device 12,18 of pre-process circuits are as shown in Figure 2 made H, it (is horizontal-drive signal (H-sync) polarity detecting unit 32 that the polarity of V signal detects, vertical synchronizing signal (V-sync) polarity detecting unit 34), H, the polar switching of V signal (is horizontal-drive signal (H-sync) polarization converting unit 28, vertical synchronizing signal (V-sync) polarization converting unit 30) and measure line length 8Mhz pulse control (being vertical synchronizing signal (V-sync) retrieval unit 36), will refinement degree higher H V separate and the post-processed circuit all concentrates in the main switching device shifter 40.So, only need complexity and cost high processing unit focused on and have only one main switching device shifter 40, thereby greatly reduce the cost of construction total system.
See also Fig. 3, Fig. 3 is the schematic diagram of master's switching device shifter of the present invention.As shown in Figure 3, main switching device shifter 40 comprises OSD 58, differential received unit 44 and FPGA42.FPGA in main switching device shifter 40
42 processing units (composite signal detecting unit 46, vertical synchronizing signal (V-sync) retrieval unit 48, vertical synchronizing signal (V-sync) are removed unit 54, burr is removed unit 56, switch unit 62) that provide pre-process circuit 18 not provide, and still comprise unit such as horizontal-drive signal (H-sync) polarity recovery unit 50, vertical synchronizing signal (V-sync) polarity recovery unit 52.
The FPGA42 that below will illustrate further the pre-process circuit 18 after simplifying and can handle the HV composite signal.
As shown in Figure 2, pre-process circuit 18 is electrically connected to computer 10, linear measure longimetry signal source 20, microprocessor 22 and differential driving unit 16, and in order to receive from the horizontal-drive signal (H-sync) of computer 10 and the signal of vertical synchronizing signal (V-sync) signal terminal, and the original polarity of horizontal-drive signal (H-sync) and vertical synchronizing signal (V-sync) signal offered microprocessor 22, notify main switching device shifter 40 by communicating circuit 24 then, so that the horizontal-drive signal in the main switching device shifter 40 (H-sync) polarity recovery unit 50, vertical synchronizing signal (V-sync) polarity recovery unit 52 can revert to original polarity with horizontal-drive signal (H-sync) and vertical synchronizing signal (V-sync) signal.
In pre-process circuit 18, horizontal-drive signal (H-sync) polarity detecting unit 32 detects the original polarity from the signal of horizontal-drive signal (H-sync) signal terminal of computer 10, and vertical synchronizing signal (V-sync) polarity detecting unit 34 detects the original polarity from the signal of vertical synchronizing signal (V-sync) signal terminal of computer 10, so that the original polarity of horizontal-drive signal (H-sync) and vertical synchronizing signal (V-sync) signal is offered microprocessor 22.Simultaneously, the testing result of horizontal-drive signal (H-sync) polarity detecting unit 32 and vertical synchronizing signal (V-sync) polarity detecting unit 34 also can be as the foundation of horizontal-drive signal (H-sync) polarization converting unit 28 with vertical synchronizing signal (V-sync) polarization converting unit.
For the horizontal-drive signal (H-sync) of positive polarity is given differential driving unit 16 with vertical synchronizing signal (V-sync) signal, so that carry out differential transfer, 28 conversions of horizontal-drive signal (H-sync) polarization converting unit become horizontal-drive signal (H-sync) signal of predetermined polarity (being positive polarity) from the signal of horizontal-drive signal (H-sync) signal terminal of computer 10.30 conversions of vertical synchronizing signal (V-sync) polarization converting unit become vertical synchronizing signal (V-sync) signal of predetermined polarity from the signal of vertical synchronizing signal (V-sync) signal terminal of computer 10.
But, signal from horizontal-drive signal (H-sync) signal terminal of computer 10 can be horizontal-drive signal (H-sync) signal or HV composite signal, and vertical synchronizing signal (V-sync) signal terminal from computer 10 can be vertical synchronizing signal (V-sync) signal or no signal simultaneously.In other words, computer 10 may only transmit the HV composite signal via horizontal-drive signal (H-sync) signal terminal.Therefore, for follow-up measurement line length 8Mhz pulse control, when running into this situation, also need utilize vertical synchronizing signal (V-sync) retrieval unit 36, at HV composite signal, from the HV composite signal, take out vertical synchronizing signal (V-sync) signal from horizontal-drive signal (H-sync) polarization converting unit 28.Therefore, offering vertical synchronizing signal (V-sync) signal of linear measure longimetry signal source 20 can be via OR logic 38 from vertical synchronizing signal (V-sync) polarization converting unit 30 or vertical synchronizing signal (V-sync) retrieval unit 36.In addition, because the synchronous precision prescribed of 8M signal is lower, so vertical synchronizing signal (V-sync) retrieval unit 36 can be simple resistance and electric capacity (RC) circuit gets final product.
In sum, when if computer 10 may only transmit the HV composite signal via horizontal-drive signal (H-sync) signal terminal, for complexity and the cost that reduces attachment device 12, pre-process circuit 18 can be ignored the HV composite signal, be directly passed to differential driving unit 16, and precision prescribed higher H V separated and the post-processed circuit changes main switching device shifter 40 concentrated being for further processing by as shown in Figure 3.
As shown in Figure 3, the main switching device shifter 40 in long distance control system of the present invention mainly can pass through 10 affiliated attachment devices 12 (as shown in Figure 1) of many computers, and these computers 10 of remote monitoring.Main switching device shifter 40 mainly comprise display unit in the screen of differential received unit 44, control display unit 60 (on-screnn display, OSD) 58, FPGA 42.The processing unit (being composite signal detecting unit 46, vertical synchronizing signal (V-sync) retrieval unit 48, vertical synchronizing signal (V-sync) removal unit 54, burr removal unit 56, switch unit 62) that 42 of FPGA in main switching device shifter 40 provide pre-process circuit 18 not provide, but still comprise horizontal-drive signal (H-sync) polarity recovery unit 50, vertical synchronizing signal (V-sync) polarity recovery unit 52.
The branch of being on duty receives unit 44 and receives the signal that these computers 10 affiliated attachment devices 12 are sent, and during respectively by horizontal-drive signal (H-sync) and vertical synchronizing signal (V-sync) terminal output signal, FPGA42 can begin to do relative work of treatment.This wherein, the signal of horizontal-drive signal (H-sync) signal terminal can be horizontal-drive signal (H-sync) signal or HV composite signal, and the signal of vertical synchronizing signal (V-sync) signal terminal can be vertical synchronizing signal (V-sync) signal or no signal.
For horizontal-drive signal (H-sync) signal that original polarity is provided, vertical synchronizing signal (V-sync) signal to display unit 60, horizontal-drive signal (H-sync) polarity that is electrically connected to differential received unit 44 is recovered the original polarity that 50 meetings of (resume) unit are provided according to attachment device 12, the signal of horizontal-drive signal (H-sync) signal terminal of differential received unit 44 is reverted to horizontal-drive signal (H-sync) signal of original polarity, input to display unit 60 again.Vertical synchronizing signal (V-sync) polarity 52 of (resume) unit of recovery of differential received unit 44 and the original polarity that is provided according to attachment device 12 are provided, the signal of vertical synchronizing signal (V-sync) signal terminal of differential received unit 44 is reverted to vertical synchronizing signal (V-sync) signal of original polarity, input to display unit 60 again.But the signal that offers OSD 58 then must be handled through accurate, so FPGA 42 can carry out separation, judgement and burr (glitch) processing of the very high HV composite signal of precision.
Because OSD58 needs to separate fully and is the HV signal of positive polarity, therefore in main switching device shifter 40, need elder generation whether to include the HV composite signal by the signal of composite signal detecting unit 46 detection level synchronizing signal (H-sync) signal terminals that are electrically connected to differential received unit 44.When if the signal packet that detects horizontal-drive signal (H-sync) signal terminal of composite signal detecting unit 46 contains the HV composite signal, then vertical synchronizing signal (V-sync) retrieval unit 48 by being electrically connected to differential received unit 44 takes out vertical synchronizing signal (V-sync) signal at the HV composite signal from differential received unit 44 from the HV composite signal.Then, vertical synchronizing signal (V-sync) is removed 54 of unit at the HV composite signal from differential received unit 44, from the HV composite signal, remove vertical synchronizing signal (V-sync) signal, and output horizontal-drive signal (H-sync) signal removes unit 56 for burr (glitch).Burr (glitch) is removed 56 horizontal-drive signal (H-sync) signals of being exported at vertical synchronizing signal (V-sync) removal unit 54 in unit and is done burr (glitch) removal, and offers OSD58.
When if the signal packet that does not detect horizontal-drive signal (H-sync) signal terminal of composite signal detecting unit 46 contains the HV composite signal, 62 of switch units electrically conduct differential received unit 44 and OSD58 directly allow differential received unit 44 output vertical synchronizing signal (V-sync) signals to OSD58.Simultaneously, still remove unit 56 output horizontal-drive signal (H-sync) signals to OSD58 by burr (glitch).
For along with whether the HV composite signal is arranged, still provide signal to OSD58, switch unit 62 is electrically connected to differential received unit 44, composite signal detecting unit 46, vertical synchronizing signal (V-sync) retrieval unit 48, OSD58, and according to the testing result of composite signal detecting unit 46, the vertical synchronizing signal that electrically conducts (V-sync) retrieval unit 48 and OSD58 or conducting differential received unit 44 and OSD58.
This wherein, if when the signal packet that detects horizontal-drive signal (H-sync) signal terminal of composite signal detecting unit 46 contains the HV composite signal, the vertical synchronizing signal that then electrically conducts (V-sync) retrieval unit 48 and OSD58.When if the signal packet that does not detect horizontal-drive signal (H-sync) signal terminal of composite signal detecting unit 46 contains the HV composite signal, the differential received that then electrically conducts unit 44 and OSD58.
In sum, utilize FPGA 42 to carry out the separation and the post-processed of above-mentioned HV composite signal, more can provide preferable precision, make more stable, compatible better, bug that image does than traditional circuit still less.For example traditional circuit is relatively poor to some LCD support, problems such as can producing flicker, be offset even can't show.
By the above detailed description of preferred embodiments, hope can be known description feature of the present invention and spirit more, and is not to come category of the present invention is limited with above-mentioned disclosed preferred embodiment.On the contrary, its objective is that hope can contain in the category that is arranged in the claimed scope of claims of the present invention of various changes and tool equality.
Claims (7)
1. attachment device dongle in long distance control system one of is affixed in many computers, and utilizes in a long-range display unit and these computers of remote monitoring, and this attachment device comprises:
One differential driving unit, be electrically connected to this computer, and in order to the rgb signal of differential conversion from this computer, and will be, and be sent at a long-range main switching device shifter by cable from the horizontal-drive signal H-sync of this computer and vertical synchronizing signal V-sync superposition to tricolor signal RGB;
One microprocessor is electrically connected to this computer, and in order to handle the signal of this computer and/or long-range this display unit;
One linear measure longimetry signal source in order to the vertical synchronizing signal V-sync of foundation from this computer, and produces the pulse of measuring line length, and this pulse and vertical synchronizing signal V-sync are synchronous; And
One pre-process circuit, be electrically connected to this computer, this linear measure longimetry signal source, this microprocessor and this differential driving unit, and in order to receive from the horizontal-drive signal H-sync signal terminal of this computer and the signal of vertical synchronizing signal V-sync signal terminal, and the original polarity of horizontal-drive signal H-sync and vertical synchronizing signal V-sync offered this microprocessor, this pre-process circuit comprises:
One horizontal-drive signal H-sync polarity detecting unit is in order to the original polarity of detection from the signal of the horizontal-drive signal H-sync signal terminal of this computer;
One vertical synchronizing signal V-sync polarity detecting unit is in order to the original polarity of detection from the signal of the vertical synchronizing signal V-sync signal terminal of this computer;
One horizontal-drive signal H-sync polarization converting unit, in order to the signal from the horizontal-drive signal H-sync signal terminal of this computer is carried out exporting after the conversion process, to be conversion become the horizontal-drive signal H-sync of predetermined polarity from the horizontal-drive signal H-sync in the signal of the horizontal-drive signal H-sync signal terminal of this computer to wherein said conversion process, is horizontal-drive signal H-sync or HV composite signal from the signal of the horizontal-drive signal H-sync signal terminal of this computer;
One vertical synchronizing signal V-sync polarization converting unit becomes the vertical synchronizing signal V-sync of predetermined polarity from the signal of the vertical synchronizing signal V-sync signal terminal of this computer in order to conversion;
One vertical synchronizing signal V-sync retrieval unit, in order to when the signal from the horizontal-drive signal H-sync signal terminal of this computer is the HV composite signal, at HV composite signal, from the HV composite signal, take out vertical synchronizing signal V-sync from this horizontal-drive signal H-sync polarization converting unit;
Wherein, offer the vertical synchronizing signal V-sync of this linear measure longimetry signal source from this vertical synchronizing signal V-sync polarization converting unit or this vertical synchronizing signal V-sync retrieval unit.
2. attachment device as claimed in claim 1, the pulse of wherein measuring line length is the 8MHz signal.
3. attachment device as claimed in claim 1, wherein predetermined polarity is a positive polarity.
4. attachment device as claimed in claim 1, wherein this vertical synchronizing signal V-sync retrieval unit is simple resistance and electric capacity RC circuit.
5. preprocess method in long distance control system one of is used in many computers, and utilizes in a long-range display unit and these computers of remote monitoring, and this preprocess method comprises:
Reception is from the horizontal-drive signal H-sync signal terminal of this computer and the signal of vertical synchronizing signal V-sync signal terminal;
Detection is from the original polarity of the signal of the horizontal-drive signal H-sync signal terminal of this computer;
Detection is from the original polarity of the signal of the vertical synchronizing signal V-sync signal terminal of this computer;
By the linear measure longimetry signal source, according to vertical synchronizing signal V-sync, and produce the pulse of measuring line length from this computer, this pulse and vertical synchronizing signal V-sync are synchronous;
Utilize horizontal-drive signal H-sync polarization converting unit, signal from the horizontal-drive signal H-sync signal terminal of this computer is carried out exporting after the conversion process, to be conversion become the horizontal-drive signal H-sync of predetermined polarity from the horizontal-drive signal H-sync in the signal of the horizontal-drive signal H-sync signal terminal of this computer to wherein said conversion process, is horizontal-drive signal H-sync or HV composite signal from the signal of the horizontal-drive signal H-sync signal terminal of this computer;
Utilize vertical synchronizing signal V-sync polarization converting unit, conversion becomes the vertical synchronizing signal V-sync of predetermined polarity from the signal of the vertical synchronizing signal V-sync signal terminal of this computer;
Utilize vertical synchronizing signal V-sync retrieval unit, when the signal from the horizontal-drive signal H-sync signal terminal of this computer is the HV composite signal, at HV composite signal, from the HV composite signal, take out vertical synchronizing signal V-sync from this horizontal-drive signal H-sync polarization converting unit;
Wherein, offer the vertical synchronizing signal V-sync of this linear measure longimetry signal source from this vertical synchronizing signal V-sync polarization converting unit or this vertical synchronizing signal V-sync retrieval unit.
6. main switching device shifter in long distance control system, the attachment devices by many computers under indivedual, and these computers of remote monitoring, this main switching device shifter comprises:
Display unit OSD in one screen controls a display unit;
One differential received unit, in order to receive the signal that this attachment device sent under these computers, and respectively by horizontal-drive signal H-sync signal terminal and vertical synchronizing signal V-sync signal terminal output signal, the signal of horizontal-drive signal H-sync signal terminal is horizontal-drive signal H-sync or HV composite signal;
One horizontal-drive signal H-sync polarity is recovered the resume unit, be electrically connected to this differential received unit, and according to original polarity that this attachment device provided, the signal of the horizontal-drive signal H-sync signal terminal of this differential received unit is reverted to the horizontal-drive signal H-sync of original polarity, input to this display unit again;
One vertical synchronizing signal V-sync polarity is recovered the resume unit, be electrically connected to this differential received unit, and according to original polarity that this attachment device provided, the signal of the vertical synchronizing signal V-sync signal terminal of this differential received unit is reverted to the vertical synchronizing signal V-sync of original polarity, input to this display unit again;
One composite signal detecting unit is electrically connected to this differential received unit, and whether the signal of detection level synchronizing signal H-sync signal terminal includes the HV composite signal;
One vertical synchronizing signal V-sync retrieval unit is electrically connected to this differential received unit, and in order at the HV composite signal from this differential received unit, takes out vertical synchronizing signal V-sync from the HV composite signal;
One vertical synchronizing signal V-sync removes the unit, in order at the HV composite signal from this differential received unit, removes vertical synchronizing signal V-sync from the HV composite signal, and output horizontal-drive signal H-sync;
One burr glitch removes the unit, does burr glitch removal in order to remove the horizontal-drive signal H-sync that exports the unit at this vertical synchronizing signal V-sync, and offers OSD;
One switches the unit, in order to be electrically connected to this differential received unit, this composite signal detecting unit, this vertical synchronizing signal V-sync retrieval unit, OSD, and according to the testing result of this composite signal detecting unit, this vertical synchronizing signal that electrically conducts V-sync retrieval unit and OSD or conducting this differential received unit and OSD;
Wherein, if when the signal packet that this composite signal detecting unit detects horizontal-drive signal H-sync signal terminal contains the HV composite signal, this vertical synchronizing signal that electrically conducts V-sync retrieval unit and OSD;
Wherein, if when the signal packet that this composite signal detecting unit does not detect horizontal-drive signal H-sync signal terminal contains the HV composite signal, this differential received unit and OSD electrically conduct.
7. preprocess method in long distance control system, the attachment devices by many computers under indivedual, and these computers of remote monitoring, this preprocess method comprises:
Utilize the differential received unit, receive the signal that affiliated this attachment device of these computers is sent, and respectively by horizontal-drive signal H-sync signal terminal and vertical synchronizing signal V-sync signal terminal output signal, the signal of horizontal-drive signal H-sync signal terminal is horizontal-drive signal H-sync or HV composite signal;
According to the original polarity that this attachment device provided, the signal of the horizontal-drive signal H-sync signal terminal of this differential received unit is reverted to the horizontal-drive signal H-sync of original polarity, input to a display unit again;
According to the original polarity that this attachment device provided, the signal of the vertical synchronizing signal V-sync signal terminal of this differential received unit is reverted to the vertical synchronizing signal V-sync of original polarity, input to this display unit again;
At HV composite signal, from the HV composite signal, take out vertical synchronizing signal V-sync from this differential received unit;
Utilize vertical synchronizing signal V-sync to remove the unit,, from the HV composite signal, remove vertical synchronizing signal V-sync and export horizontal-drive signal H-sync at HV composite signal from this differential received unit; And
Remove the horizontal-drive signal H-sync that exports the unit at this vertical synchronizing signal V-sync and do burr glitch removal, and offer display unit OSD in the screen.
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| CN103995598A (en) * | 2014-02-26 | 2014-08-20 | 山东超越数控电子有限公司 | HPS-based OSD interface switching scheme of FPGA |
| CN109738965A (en) * | 2019-03-08 | 2019-05-10 | 吴利军 | A kind of earthquake observation instruments automatic monitoring equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1475899A (en) * | 2002-08-13 | 2004-02-18 | 联想(北京)有限公司 | Multipath data display signal intelligent switch over device |
| CN1963740A (en) * | 2005-11-11 | 2007-05-16 | 杨建兴 | Switch apparatus capable of receiving multi-specification signal |
-
2007
- 2007-07-24 CN CN2007101390743A patent/CN101355690B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1475899A (en) * | 2002-08-13 | 2004-02-18 | 联想(北京)有限公司 | Multipath data display signal intelligent switch over device |
| CN1963740A (en) * | 2005-11-11 | 2007-05-16 | 杨建兴 | Switch apparatus capable of receiving multi-specification signal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101355690A (en) | 2009-01-28 |
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