CN114339080B - Video matrix switching system based on domestic chip - Google Patents
Video matrix switching system based on domestic chip Download PDFInfo
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- CN114339080B CN114339080B CN202111459124.2A CN202111459124A CN114339080B CN 114339080 B CN114339080 B CN 114339080B CN 202111459124 A CN202111459124 A CN 202111459124A CN 114339080 B CN114339080 B CN 114339080B
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Abstract
The invention discloses a video matrix switching system based on domestic chips, which comprises an external socket board, a bottom board, a power module and a video matrix board; the external socket board is provided with a power supply, a serial port and a video signal input and output connector; the bottom plate is connected with a connector on the external socket plate through a cable by a connector of the CRM model on the board card; the power module and the video matrix board are respectively connected with the bottom board through CPCI connectors; the invention can simplify the circuit structure of the original video matrix switching system, improve the internal cleanliness of the case, reduce the occupied case space and reduce the fault nodes.
Description
Technical Field
The invention belongs to the technical field of video matrix switching, and particularly relates to a video matrix switching system realized based on a domestic chip.
Background
Because the original video matrix wants to realize multi-channel input and multi-channel output and is formed by integrating a plurality of boards, most of the boards are industrial-grade and have no mounting holes, the fastening is realized by additionally installing a fixed support and an adapter plate on the periphery, thus greatly increasing the disassembly workload of the video matrix board and being inconvenient to maintain.
The original video matrix module is complex in insulating measure treatment, poor in operability and easy to cause misoperation during installation, so that the insulation of equipment is damaged.
Disclosure of Invention
In view of this, the invention provides a video matrix switching system based on domestic chips, which can simplify the circuit structure of the original video matrix switching system, reduce the occupied space of a case and reduce fault nodes.
The technical scheme for realizing the invention is as follows:
A video matrix switching system based on domestic chips comprises an external socket board, a bottom board, a power module and a video matrix board;
The external socket board is provided with a power supply, a serial port and a video signal input and output connector; the bottom plate is connected with a connector on the external socket plate through a cable by a connector of the CRM model on the board card; the power module and the video matrix board are respectively connected with the bottom board through CPCI connectors.
Further, the video matrix board comprises an RS232 serial port chip, a main chip, a programmable logic chip, a video switching chip, a buffer chip, a semiconductor logic chip, a PAL conversion VGA chip and a power supply conversion chip;
The RS232 serial port chip receives an external communication instruction, the output end of the RS232 serial port chip is connected with the input end of the main chip, and the internal bus receives a serial port protocol instruction to complete the matrix switching function of 6 paths of VGA and 2 paths of PAL video signals and 8 paths of VGA output;
The output end of the main chip is respectively connected with the input end of the programmable logic chip, the input end of the video switching chip and the input end of the PAL conversion VGA chip to finish PAL conversion into VGA, and synchronously switches analog signals and digital signals; the output end of the main chip is connected with the input ends of the fault indicator lamp and the operation indicator lamp;
The output end of the video switching chip is connected with the input end of the buffer chip, the input end of the video switching chip is connected with the output end of the PAL conversion VGA chip, and an externally input analog signal is input into the input end of the video switching chip; externally input PAL signals are input into the input end of the PAL conversion VGA chip, and the output end of the PAL conversion VGA chip is connected with the input end of the buffer chip; externally input digital signals are input into the input end of the buffer chip, and the output end of the buffer chip is connected with the input end of the programmable logic chip;
the output end of the programmable logic chip is connected with the semiconductor logic chip.
Further, the RS232 serial port chip, the main chip and the programmable logic chip are powered by the power conversion chip to convert DC5V input by the power module into 3.3V voltage.
Further, the model of the RS232 serial port chip is UT3232G-P16-R.
Further, the model of the main chip is IAP15W4K61S4.
Further, model LC4128V of programmable logic chip.
The beneficial effects are that:
the video matrix switching system simplifies the circuit structure of the original video matrix switching system, improves the internal cleanliness of the case, reduces the space of the case, reduces fault nodes and creates favorable conditions for later maintenance.
Drawings
Fig. 1 is a diagram of a video matrix system connection relationship.
Fig. 2 is a schematic diagram of the operation of the video matrix board.
Detailed Description
The invention will now be described in detail by way of example with reference to the accompanying drawings.
A video matrix switching system structure based on domestic chips adopts a video matrix board as an integrated board card type, and realizes front quick assembly and disassembly through a pull-out aid, and an internal power module is designed as a board card type power module and is inserted with the video matrix board from the front part of a box body side by side. A bottom plate is arranged in the box body, 2 slots are arranged, the first slot is a power module, and the second slot is a video matrix. The connection relation diagram of the video matrix system is shown in fig. 1, and a power supply, a serial port and video signal input and output connectors are arranged on the external socket board. The bottom board is connected with a connector on the external socket board through a connector of the CRM model on the board card by using a coaxial radio frequency cable SFF-50-1.5-1; the power module and the video matrix board are respectively connected with the bottom board through CPCI connectors.
As shown in fig. 2, the video matrix board mainly comprises an RS232 serial port chip (model UT 3232G-P16-R), a main chip (model IAP15W4K61S 4), a programmable logic chip (model LC 4128V), a video switching chip (model AD 8109), a buffer chip (model 7HCT 541), a semiconductor logic chip (chip models 74HCT05 and 74HCT 14), a PAL conversion VGA chip (model MS 1851), and a power conversion chip (model LM 3940).
The RS232 serial port chip receives a host control instruction from the outside, is connected with the input end of the main chip through the output end of the RS232 serial port chip, and the internal bus receives serial port protocol instructions to complete the matrix switching function of 6 paths of VGA and 2 paths of PAL video signals and 8 paths of VGA output;
The output end of the main chip is respectively connected with the input end of the programmable logic chip, the input end of the video switching chip and the input end of the PAL conversion VGA chip to finish the conversion of the PAL into the VGA, and the synchronous switching function of the analog signal and the digital signal is carried out. And detecting whether the input and output signals are normal or not, feeding back a detection result to the main chip, and simultaneously reading the register value of the switching circuit by the main chip to obtain the switching state of each channel and the working state of the switching circuit. The main chip processes various state information and feeds information results back to the host through the serial port, the host processes and manages the state information through management software of the equipment, the output end of the main chip is connected with the input ends of the fault indicator lamp and the running indicator lamp, and the indicator lamp makes corresponding reactions according to corresponding working states.
And the main chip is used for carrying out matrix switching control on the video switching chip and the programmable logic chip, carrying out data transmission, chip control and channel state monitoring on the main chip, the video switching chip and the programmable logic chip through an internal bus, and receiving state feedback information of the signal detection module. The main chip and the host adopt serial port RS232 communication, analyze the instruction sent by the host and send the instruction to the video switching chip and the programmable logic chip to complete the matrix switching function; and simultaneously, the main chip feeds back the monitored working state information of the whole video matrix switching equipment to the host computer through the serial port.
The output end of the video switching chip is connected with the input end of the buffer chip, the input end of the video switching chip is connected with the output end of the PAL conversion VGA chip, and an externally input analog signal is input into the input end of the video switching chip; externally input PAL signals are input into the input end of the PAL conversion VGA chip, and the output end of the PAL conversion VGA chip is connected with the input end of the buffer chip; the externally input digital signal is input into the input end of the buffer chip, and the output end of the buffer chip is connected with the input end of the programmable logic chip.
The output end of the programmable logic chip is connected with the input end of the semiconductor logic chip 74HCT 05; the output of the 74HCT05 chip is connected to the input of the chip 74HCT 14.
The buffer chip and the semiconductor logic chips 74HCT05 and 74HCT14 are directly powered by DC5V output by the power supply module, and the serial port RS232 serial port chip, the main chip and the programmable logic chip are powered by the LM3940 power supply conversion chip by converting DC5V input by the power supply module into 3.3V voltage.
In summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The video matrix switching system based on the domestic chip is characterized by comprising an external socket board, a bottom board, a power module and a video matrix board;
The external socket board is provided with a power supply, a serial port and a video signal input and output connector; the bottom plate is connected with a connector on the external socket plate through a cable by a connector of the CRM model on the board card; the power module and the video matrix board are respectively connected with the bottom board through CPCI connectors; the base plate is provided with 2 slots, the first slot is a power module, and the second slot is a video matrix;
The video matrix board comprises an RS232 serial port chip, a main chip, a programmable logic chip, a video switching chip, a buffer chip, a semiconductor logic chip, a PAL conversion VGA chip and a power conversion chip;
the RS232 serial port chip receives a communication instruction from the outside, the output end of the RS232 serial port chip is connected with the input end of the main chip, and the internal bus receives a serial port protocol instruction to complete the matrix switching function of 6 paths of VGA and 2 paths of PAL video signals and 8 paths of VGA output;
The output end of the main chip is respectively connected with the input end of the programmable logic chip, the input end of the video switching chip and the input end of the PAL conversion VGA chip to finish PAL conversion into VGA, and synchronously switches analog signals and digital signals; the output end of the main chip is connected with the input ends of the fault indicator lamp and the operation indicator lamp;
The output end of the video switching chip is connected with the input end of the buffer chip, the input end of the video switching chip is connected with the output end of the PAL conversion VGA chip, and an externally input analog signal is input into the input end of the video switching chip; externally input PAL signals are input into the input end of the PAL conversion VGA chip, and the output end of the PAL conversion VGA chip is connected with the input end of the buffer chip; externally input digital signals are input into the input end of the buffer chip, and the output end of the buffer chip is connected with the input end of the programmable logic chip;
the output end of the programmable logic chip is connected with the semiconductor logic chip.
2. The video matrix switching system based on the domestic chip as claimed in claim 1, wherein the RS232 serial port chip, the main chip and the programmable logic chip are powered by the power conversion chip to convert the DC5V input by the power module into 3.3V.
3. The video matrix switching system implemented based on a domestic chip as claimed in claim 1, wherein the RS232 serial port chip is of the type UT3232G-P16-R.
4. The video matrix switching system implemented based on a home-made chip of claim 1, wherein the master chip is IAP15W4K61S4.
5. The video matrix switching system of claim 1, wherein the programmable logic chip is model LC4128V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111459124.2A CN114339080B (en) | 2021-12-02 | Video matrix switching system based on domestic chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111459124.2A CN114339080B (en) | 2021-12-02 | Video matrix switching system based on domestic chip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114339080A CN114339080A (en) | 2022-04-12 |
| CN114339080B true CN114339080B (en) | 2024-07-05 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201623720U (en) * | 2010-04-22 | 2010-11-03 | 沈阳帝信通信电子工程有限公司 | Embedded type interface board supporting POE and double power supply |
| CN105979227A (en) * | 2016-06-29 | 2016-09-28 | 国网福建省电力有限公司 | Electricity intranet and internet integrated video transmission device based on CPCI interface |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201623720U (en) * | 2010-04-22 | 2010-11-03 | 沈阳帝信通信电子工程有限公司 | Embedded type interface board supporting POE and double power supply |
| CN105979227A (en) * | 2016-06-29 | 2016-09-28 | 国网福建省电力有限公司 | Electricity intranet and internet integrated video transmission device based on CPCI interface |
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