Intrinsically safe audio and video signal serial transmission system for underground coal mine

Abstract

The utility model provides an intrinsically safe audio and video signal serial transmission system for an underground coal mine, and belongs to the technical field of underground audio and video signal transmission. The problems of high cost, large occupied space and the like caused by optical cable transmission of underground audio and video signals at present are solved. Comprising an audio and video signal transmitting end and an audio and video signal receiving end, the transmitting end is arranged in an explosive-proof cavity of an explosive-proof and intrinsically safe computer configured in an underground crossheading monitoring center, and non-intrinsically safe audio and video signals are converted into intrinsically safe serial signals; the receiving end is arranged in an intrinsically safe display and converts intrinsically safe serial signals into audio and video signals, and the transmitting end and the receiving end are connected through a mining cable; the underground coal mine audio and video signal transmission device is applied to underground coal mine audio and video signal transmission.

Description

TECHNICAL FIELD

[0001] The utility model provides a kind of for coal mine under nature safety type audio and video signal serial transmission system, belong to audio and video signal transmission technical field. BACKGROUND

[0002] With the development of fully mechanized intelligent technology, the construction of modern mine will integrate Internet of Things, cloud computing, big data, artificial intelligence, automatic control, industrial internet and robotized equipment with modern mine development technology, form a complete intelligent system of mine comprehensive perception, real-time interconnection, analysis and decision-making, autonomous learning, dynamic prediction and collaborative control, and realize the intelligent operation of mine development, mining, transportation, sorting, safety guarantee, ecological protection and production management.

[0003] The crossheading monitoring center plays a role of remote monitoring of mining site, remote control of operating equipment, transmission of on-site production conditions to the ground command center through video and voice mode, and adjustment of on-site equipment operation status in the whole system. The mine computer is the brain of the whole crossheading monitoring center and becomes an indispensable part.

[0004] At present, the mine computer configured in the crossheading monitoring center is mainly explosion-proof and intrinsic safety type computer and intrinsic safety display. Since the video signal design is complex, the video signal transmission mode is mostly through converting the video signal into optical cable signal for transmission, and the explosion-proof and intrinsic safety type computer and the intrinsic safety display are connected through special optical cable. The special optical cable also needs to be specially customized, with high manufacturing cost and long cycle. Due to the material properties of the optical cable, the bending radius needs to be controlled during installation and wiring, so a large space is occupied. At the same time, the optical cable is also relatively fragile, and too small bending radius can easily break.

[0005] The transmission system of audio and video signals is a crucial link of the crossheading monitoring center. Reducing the transmission cost of audio and video signals, ensuring the stable and reliable transmission of audio and video signals, and reducing the space occupation of audio and video transmission system have become urgent problems to be solved. Utility model content

[0006] The utility model discloses to solve the problem of high cost and large space occupation of optical cable transmission of audio and video signals underground at present, and proposes a nature safety type audio and video signal serial transmission system for coal mine underground, which aims to improve the circuit structure of audio and video signal transmission and reception, realize the stable and reliable transmission of audio and video signals between explosion-proof and intrinsic safety type computer and intrinsic safety display.

[0007] The utility model discloses a technical scheme for: a kind of for coal mine underground intrinsically safe audio and video signal serial transmission system, including the transmitting end and receiving end of audio and video signal, wherein transmitting end is arranged in the explosion-proof chamber of explosion-proof and intrinsically safe computer of underground crossheading monitoring center configuration, and non-intrinsically safe audio and video signal is converted into intrinsically safe serial signal;Receiving end is arranged in intrinsically safe display, and intrinsically safe serial signal is converted into audio and video signal, and transmitting end and receiving end are connected by mine cable;

[0008] The transmitting end includes an intrinsically safe power supply processing module, an intrinsically safe power supply output module, an audio and video receiving module, an audio and video data to serial data module, and an intrinsically safe sending module.

[0009] The receiving end includes a power supply module, an intrinsically safe receiving module, a serial data to audio and video data module, and an audio and video output module.

[0010] Further, the serial data to audio and video data module includes a serial audio and video data to parallel data module and a parallel data to HDMI data module.

[0011] Further, the intrinsically safe sending module and the intrinsically safe receiving module are both provided with intrinsically safe circuits.

[0012] Further, the intrinsically safe sending module and the intrinsically safe receiving module realize serial data transmission through a single pair of twisted wire.

[0013] The utility model has the following beneficial effects compared with the prior art:

[0014] 1. The audio and video signals between the explosion-proof and intrinsically safe computer and the intrinsically safe display are transmitted using cables, and the production cost can be reduced to 1 / 5 of the optical cable transmission cost.

[0015] 2. Due to limited space, and the material properties of cables and optical fibers, cable transmission is more flexible, occupies less space, and is easier to wire in the roadway monitoring center.

[0016] 3. Compared with optical fiber, cable has certain advantages in flexibility, is not easy to break, and has more reliable transmission. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the complete signal transmission structure of the system of this utility model;

[0019] Figure 2 This is a circuit block diagram of the transmitting end;

[0020] Figure 3 This is the circuit block diagram of the receiving end;

[0021] Figure 4 This is the circuit schematic of the intrinsically safe receiver module at the receiving end;

[0022] Figure 5 The circuit schematic for the serial audio / video data to parallel data conversion module at the receiving end;

[0023] Figure 6 The circuit schematic for the parallel data to HDMI data conversion module at the receiving end;

[0024] Figure 7 This is the circuit schematic of the audio and video transmission module at the receiving end. Detailed Implementation

[0025] like Figures 1 to 7 As shown, this utility model provides an intrinsically safe audio and video signal serial transmission system for underground coal mines, including an audio and video signal transmitter and a receiver. The audio and video signal transmitter is arranged inside the explosion-proof cavity of an explosion-proof and intrinsically safe computer, used to convert non-intrinsically safe audio and video signals into intrinsically safe serial signals. The audio and video signal receiver is arranged inside an intrinsically safe display, used to convert intrinsically safe serial signals into audio and video signals. The power supply and serial signal between the explosion-proof and intrinsically safe computer and the intrinsically safe display are connected through a mining cable.

[0026] like Figure 2 As shown, the transmitter mainly consists of an intrinsically safe power processing module, an intrinsically safe power output module, an audio / video receiving module, an audio / video data to serial data conversion module, and an intrinsically safe transmitting module.

[0027] The intrinsically safe power processing module is responsible for converting non-intrinsically safe power input into intrinsically safe power through multiple protection circuits to power the various modules of the transmitter and receiver, and outputting it to the intrinsically safe power output module.

[0028] The intrinsic safety power supply output module is responsible for transmitting the intrinsic safety power supply to the receiving end of the audio and video signal for power supply use.

[0029] The audio and video receiving module is responsible for receiving the input of audio and video data and forwarding to the audio and video data to serial data module.

[0030] The audio and video data to serial data module adopts lossless compression technology to compress the audio and video data into serial data.

[0031] The intrinsic safety generation module is responsible for limiting the current and other measures of serial data to realize high-speed long-distance transmission of audio and video serial signals and ensure that the circuit meets the design requirements of intrinsic safety.

[0032] As shown in Figure 3 The receiving end is mainly composed of a power supply module, an intrinsic safety receiving module, a serial data to audio and video data module and an audio and video output module.

[0033] The power supply module is responsible for receiving the intrinsic safety power supply input of the transmitting end for power supply use of each module of the receiving end.

[0034] The intrinsic safety receiving module is responsible for receiving the audio and video serial data of the transmitting end, ensuring that the circuit meets the design requirements of intrinsic safety, and forwarding to the serial data to audio and video data module. The intrinsic safety receiving module part is designed with an intrinsic safety transmission circuit, as shown in Figure 4 The interface of the intrinsic safety transmission module part adopts a single pair of twisted wires to realize serial reception.

[0035] The serial data to audio and video data module is responsible for parsing the compressed audio and video serial data into standard audio and video signals. The serial data to audio and video data module specifically includes a serial audio and video data to parallel data module and a parallel data to HDMI data module.

[0036] The audio and video output module is responsible for sending the standard HDMI audio and video signals to liquid crystal screens and other devices for use.

[0037] The utility model adopts serial data transmission, and the number of data lines is small (single pair of twisted wires), and long-distance transmission can be realized. Intrinsic safety transmission design and intrinsically safe equipment are adopted, and can be applied to underground working conditions.

[0038] The intrinsic safety audio and video signal serial transmission system for coal mine underground provided by the utility model can realize stable and reliable transmission of audio and video signals between the explosion-proof and intrinsic safety computer and the intrinsic safety display, can greatly reduce the cost of audio and video signal transmission, reduce the space occupation, make the space design of the crossheading monitoring center more reasonable and the installation more convenient.

[0039] It should be noted that the connection relationship between the components and modules of the utility model is determined and can be realized, and the specific connection relationship can bring about corresponding technical effects, and based on the premise of not relying on the corresponding software program execution, the technical problems proposed by the utility model are solved, the model, the connection mode between the components, the modules and the specific components, the conventional use method brought about by the above technical features, the predictable technical effects, and the like are all the disclosed contents in the patent, the journal paper, the technical manual, the technical dictionary, the textbook, or the like which can be obtained by the technical personnel in the field before the application date, or the existing technology such as the conventional technology and the common knowledge, and thus no further description is needed, so that the technical scheme provided by the case is clear, complete and realizable, and the corresponding entity product can be reproduced or obtained according to the technical means.

[0040] Finally, it should be noted that: the above embodiments are only used to illustrate the technical scheme of the utility model, rather than limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the utility model.

Claims

1. An intrinsically safe audio and video signal serial transmission system for use in underground coal mines, characterized in that: The application relates to a transmitting end and a receiving end of an audio and video signal, wherein the transmitting end is arranged in an explosion-proof cavity of an explosion-proof and intrinsic safety type computer arranged in a downhole crossheading monitoring center, and converts non-intrinsic safety audio and video signals into intrinsic safety serial signals; the receiving end is arranged in an intrinsic safety display, and converts the intrinsic safety serial signals into audio and video signals; and the transmitting end and the receiving end are connected through a mine cable. The transmitting end comprises an intrinsic safety power supply processing module, an intrinsic safety power supply output module, an audio and video receiving module, an audio and video data to serial data module and an intrinsic safety sending module; the input end of the intrinsic safety power supply processing module is connected with a power supply input; the output end of the intrinsic safety power supply processing module is connected with the intrinsic safety power supply output module, the audio and video receiving module, the audio and video data to serial data module and the intrinsic safety sending module; the input end of the audio and video receiving module is connected with an audio and video signal input; the output end of the audio and video receiving module is connected with the input end of the audio and video data to serial data module; the output end of the audio and video data to serial data module is connected with the intrinsic safety sending module; and the intrinsic safety sending module outputs serial data. The receiving end comprises a power supply module, an intrinsic safety receiving module, a serial data to audio and video data module and an audio and video output module; the input end of the power supply module is connected with the intrinsic safety power supply output module; the output end of the power supply module is connected with the intrinsic safety receiving module, the serial data to audio and video data module and the audio and video output module; the input end of the intrinsic safety receiving module is connected with the intrinsic safety sending module of the transmitting end; the output end of the intrinsic safety receiving module is connected with the input end of the serial data to audio and video data module; the output end of the serial data to audio and video data module is connected with the input end of the audio and video output module; and the output end of the audio and video output module is connected with a display.

2. The intrinsically safe audio and video signal serial transmission system for underground coal mine according to claim 1, characterized in that: The serial data to audio and video data module comprises a serial audio and video data to parallel data module and a parallel data to HDMI data module.

3. The intrinsically safe audio and video signal serial transmission system for underground coal mine according to claim 1, characterized in that: The intrinsic safety sending module and the intrinsic safety receiving module are both provided with intrinsic safety circuits.

4. The intrinsically safe audio and video signal serial transmission system for underground coal mine according to claim 3, characterized in that: The intrinsic safety sending module and the intrinsic safety receiving module realize serial data transmission through a single pair of twisted wires.

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