CN212012911U - CATV-based serial port communication control circuit and OTA (over the air) upgrading system - Google Patents

Abstract

The utility model discloses a serial ports communication control circuit and OTA upgrading system based on CATV, include: the system comprises a main control module, a power supply module, a CATV digital control module, an optical network control module and an interactive terminal; the power supply module is respectively and electrically connected with the main control module, the CATV digital control module and the optical network control module; the main control module comprises an interface communication unit; the CATV digital control module and the optical network control module are respectively in communication connection with the main control module through the interface communication unit; the CATV digital control module and the optical network control module are respectively in communication connection with the main control module; the CATV digital control module is used for converting photoelectric signals; and the optical network control module reads the working state parameters of the main control module and transmits the working state parameters to the interactive terminal for real-time display. Meanwhile, the optical network control module completes remote upgrade of the main control module through the interactive terminal. The utility model has the advantages of long transmission distance, small attenuation, wide bandwidth, flexible protocol and convenience and quickness.

Description

CATV-based serial port communication control circuit and OTA (over the air) upgrading system

Technical Field

The utility model relates to a CATV network control technical field especially relates to a serial ports communication control circuit based on CATV.

Background

With the rapid development of modern communication systems, the development of CATV networks has progressed from the traditional one-way entertainment television broadcasting service to the two-way comprehensive interactive service. The increasing expectations of users for networks, the increasing complexity of networks and the constant emergence of new services make it increasingly important to enhance the management of cable television network systems. In addition, with the advent of new services such as ip, more and more networks including CATV networks are interconnected to provide communication of data and information between each other. To ensure the security of the network and to make reasonable use of information and resources, more efficient and powerful control and management systems are needed.

In the function of CATV network management, in the traditional CATV unidirectional network, the function of network management is limited in the monitoring of equipment state, and now with the development of a bidirectional CATV network system and the emergence of various interactive operations with users, the requirement for intelligent planning and management of an operating network simultaneously makes a network management system established on the traditional CATV network management function more and more difficult to adapt to the requirement of a modern network, and the modern CATV network needs to break through the traditional CATV network management function, and accordingly a network management model of the modern CATV network is established on the basis of the requirement.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide serial ports communication control circuit based on CATV.

In a first aspect, the utility model discloses a serial port communication control circuit based on CATV, including main control module, power module, CATV digital control module, optical network control module and mutual terminal; the power supply module is respectively and electrically connected with the main control module, the CATV digital control module and the optical network control module; the main control module comprises an interface communication unit; the CATV digital control module and the optical network control module are respectively in communication connection with the main control module through the interface communication unit; the CATV digital control module is used for converting photoelectric signals; the optical network control module reads the working state parameters of the main control module and transmits the working state parameters to the interactive terminal for real-time display; and the optical network control module completes remote upgrade of the main control module through the interactive terminal.

Preferably, the CATV digital control module includes a CATV digital control unit and an amplification unit; the CATV digital control unit is respectively electrically connected with the main control module, the optical network control module, the power supply module and the amplifying unit, and the amplifying unit is electrically connected with the main control module.

Preferably, the CATV digital control module communicates with the main control module through IIC, and the optical network control module communicates with the main control module through USART.

Preferably, the power module comprises a voltage reduction unit and a capacitor network unit; the voltage reduction unit is electrically connected with the capacitance network unit, and the capacitance network unit is respectively and electrically connected with the main control module and the CATV digital control module.

Preferably, the CATV digital control unit includes a CATV digitizing chip, an input processing unit and an output processing unit; the input processing unit and the output processing unit are respectively and electrically connected with the CATV digital chip, and the CATV digital chip is respectively and electrically connected with the interface communication unit and the power supply module.

Preferably, the amplifying unit includes a first operational amplifier, a first diode, a second diode, a first resistor, a second resistor, a third resistor, a fourth resistor, and a first capacitor; a first end of the first resistor is electrically connected with the first operational amplifier, a second end of the first resistor is electrically connected with a first end of the first diode and a first end of the second resistor, a second end of the second resistor is electrically connected with a first end of the second diode, and a second end of the first diode and a second end of the second diode are electrically connected with the output processing unit; the first end of the third resistor and the first end of the fourth resistor are electrically connected with the first operational amplifier, the second end of the third resistor is grounded, the second end of the fourth resistor is electrically connected with the first end of the first capacitor and the main control module, and the second end of the first capacitor is grounded.

Preferably, the interface communication unit includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a second capacitor, and a third capacitor; the first end of the fifth resistor and the first end of the sixth resistor are electrically connected with the main control module, the second end of the fifth resistor is electrically connected with the first end of the seventh resistor, the CATV digital chip, the first end of the second capacitor and the first end of the eighth resistor, a second end of the seventh resistor is electrically connected with the main control module, a second end of the eighth resistor is electrically connected with the optical network control module, the second end of the sixth resistor is electrically connected to the CATV digitizing chip, the first end of the third capacitor, the first end of the ninth resistor and the first end of the tenth resistor, a first end of the ninth resistor is electrically connected to the main control module, a second end of the tenth resistor is electrically connected to the optical network control module, and a second end of the second capacitor and a second end of the third capacitor are grounded.

In a second aspect, the present invention provides an OTA upgrading system, which comprises the first aspect of the CATV-based serial communication control circuit.

The utility model discloses a serial ports communication control circuit and OTA upgrade system based on CATV has following beneficial effect, the utility model discloses a serial ports communication control circuit based on CATV includes: the system comprises a main control module, a power supply module, a CATV digital control module, an optical network control module and an interactive terminal; the power supply module is respectively and electrically connected with the main control module, the CATV digital control module and the optical network control module; the main control module comprises an interface communication unit; the CATV digital control module and the optical network control module are respectively in communication connection with the main control module through the interface communication unit; the CATV digital control module is used for converting photoelectric signals; the optical network control module reads the working state parameters of the main control module and transmits the working state parameters to the interactive terminal for real-time display; and the optical network control module completes remote upgrade of the main control module through the interactive terminal. Compared with the traditional coaxial cable and cable television, the CATV-FTTH has the advantages of low optical fiber transmission cost (the optical fiber material is cheaper than the coaxial cable and cable television), long transmission distance, small optical fiber transmission attenuation (less than 0.4dB/km), wide bandwidth and flexible protocol, and conforms to the large-scale application mode of operators. Furthermore, the utility model discloses only need update mutual terminal with new application and can upgrade, convenient and fast has significantly reduced the human cost. Therefore, the utility model has the advantages of long transmission distance, small attenuation, wide bandwidth, flexible protocol, convenience and quickness.

Drawings

Fig. 1 is a schematic block diagram of a CATV-based serial communication control circuit according to a preferred embodiment of the present invention;

FIG. 2 is a circuit diagram of the control module of the CATV-based serial communication control circuit according to the preferred embodiment of the present invention

Fig. 3 is a circuit diagram of an amplifying unit of the CATV-based serial port communication control circuit according to the preferred embodiment of the present invention;

fig. 4 is a circuit diagram of a CATV digital control unit based on a CATV serial communication control circuit according to a preferred embodiment of the present invention;

fig. 5 is a circuit diagram of an interface communication unit of the CATV-based serial communication control circuit according to the preferred embodiment of the present invention;

fig. 6 is a circuit diagram of an interface communication unit of the CATV-based serial communication control circuit according to the preferred embodiment of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples. It should be noted that, if there is no conflict, the embodiments and various features in the embodiments of the present invention may be combined with each other, and all are within the scope of the present invention.

Example one

Referring to fig. 1, the utility model discloses a serial port communication control circuit based on CATV, which comprises a main control module 1, a power module 2, a CATV digital control module 3, an optical network control module 4 and an interactive terminal 5; the power module 2 is respectively electrically connected with the main control module 1, the CATV digital control module 3 and the optical network control module 4; the main control module 1 comprises an interface communication unit 11; the CATV digital control module and the optical network control module 4 are respectively in communication connection with the main control module 1 through the interface communication unit 11; the CATV digital control module 3 is used for converting photoelectric signals; the optical network control module 4 reads the working state parameters of the main control module and transmits the working state parameters to the interactive terminal for real-time display; and the optical network control module 4 completes remote upgrade of the main control module 1 through the interactive terminal. Compared with the traditional coaxial cable and cable television, the CATV-FTTH has the advantages of low optical fiber transmission cost (the optical fiber material is cheaper than the coaxial cable and cable television), long transmission distance, small optical fiber transmission attenuation (less than 0.4dB/km), wide bandwidth and flexible protocol, and conforms to the large-scale application mode of operators. Furthermore, the utility model discloses only need update mutual terminal with new application and can upgrade, convenient and fast has significantly reduced the human cost. Therefore, the utility model has the advantages of long transmission distance, small attenuation, wide bandwidth, flexible protocol, convenience and quickness.

Preferably, the utility model discloses a solve that traditional CTAV functional interface is single and the more loaded down with trivial details problem of software operation need be upgraded again in the parameter modification, open the interface of all parameters for optical network control module unified management. Therefore, the user can acquire and observe the states and signal values of the optical network equipment and the main control module 1 in real time through the interactive terminal at any time, and meanwhile, remote modification of the operation parameters of the equipment is supported, so that manpower and material resources are saved, the process is simplified, and the test production is facilitated. In addition, the system has a power-off memory function, all parameters are stored in a FLASH area after being modified, and the power-off restart is still effective. The system also has a remote upgrading function, if the program logic function needs to be modified, the compiled file is directly loaded from the interactive terminal without disassembling the machine and is downloaded into the optical network control module 4, and CATV can be directly upgraded through the optical network control module 4.

Preferably, in this embodiment, the main control module 1 further includes a controller 12, a radio frequency switch unit 13, a radio frequency detection unit 14, a debugging unit 15, an online programming unit 16, a reset unit 17, and a display unit 18. The amplifying unit 32 is electrically connected to the controller 12 through the rf switch unit 13, and the interface communication unit 11 is electrically connected to the controller 1 through the rf switch unit 13. The debugging unit 15, the online burning unit 16, the resetting unit 17 and the display unit 18 are electrically connected with the controller 1 respectively. The online burning unit 16 is a remote upgrade interface unit of the main control module; the display unit 18 is used for indicating the fault state and the normal working state of the system. In the present embodiment, the model number of the controller 1 is N76E 003. The controller may be an FPGA or a PLC, and the type of the controller is not specifically limited herein. In this embodiment, the Optical Network control module is specifically an ONU (Optical Network Unit), that is, an Optical Network device.

Preferably, the CATV digital control module 3 includes a CATV digital control unit 31 and an amplification unit 32; the CATV digital control unit 31 is electrically connected to the main control module 1, the optical network control module 4, the power module 2, and the amplification unit 32, respectively, and the amplification unit 32 is electrically connected to the main control module 1. The CATV digital control unit 31 is configured to access an optical fiber line and convert an optical signal acquired from the optical fiber line into an electrical signal, and the amplification unit amplifies the electrical signal and then sends the amplified electrical signal to the main control module for signal processing.

Preferably, the CATV digital control module 3 communicates with the main control module 1 through IIC, and the main control module 1 has FLASH therein to complete parameter memory and management functions. The optical network control module 4 communicates with the main control module 1 through a USART port, and the optical network control module 4 can read the working state of the main control module in real time through the USART port and visually display parameters such as the equipment state and the signal intensity value on the interactive terminal 5. Meanwhile, the optical network control module 4 can download new application software from the interactive terminal to the local, and then complete the upgrade of the main control module 1. Therefore, the utility model discloses only need arrive new application update mutual terminal can accomplish the upgrading, convenient and fast, the human cost that has significantly reduced.

Preferably, referring to fig. 3, the amplifying unit includes a first operational amplifier U2, a first diode D1, a second diode D2, a first resistor R64, a second resistor R62, a third resistor R65, a fourth resistor R67, and a first capacitor C53; a first end of the first resistor R64 is electrically connected to the first operational amplifier U2, a second end of the first resistor R64 is electrically connected to a first end of the first diode D1 and a first end of the second resistor R62, a second end of the second resistor R62 is electrically connected to a first end of the second diode D2, and a second end of the first diode D1 and a second end of the second diode D2 are electrically connected to the output processing unit 313; the first end of the third resistor R65 and the first end of the fourth resistor R67 are electrically connected to the first operational amplifier, the second end of the third resistor R65 is grounded, the second end of the fourth resistor R67 is electrically connected to the first end of the first capacitor C53 and the main control module 1, and the second end of the first capacitor C53 is grounded. In another preferred embodiment, the amplifying unit further includes an eleventh resistor R61, a twelfth resistor R60, a thirteenth resistor R68, a fourteenth resistor R66, a fourth capacitor C52 and a fifth capacitor C54. Fig. 3 shows the electrical connection of the eleventh resistor R61, the twelfth resistor R60, the thirteenth resistor R68, the fourteenth resistor R66, the fourth capacitor C52 and the fifth capacitor C54. In the present embodiment, the model of the first operational amplifier U2 is LM 158. The first operational amplifier U2 is built-in, and the model of the first operational amplifier can be LM258 or LM 2904. The type of the first operational amplifier is not particularly limited herein.

Preferably, referring to fig. 4, the CATV digital control unit includes a CATV digitizing chip 311, an input processing unit 312, and an output processing unit 313; the input processing unit 312 and the output processing unit 313 are electrically connected to the CATV digitizing chip 311, respectively, and the CATV digitizing chip 311 is electrically connected to the interface communication unit 11 and the power module 2, respectively. In this embodiment, the CATV digitizing chip 31 has a model number RT 990. RT990 integrates the temperature detection unit internally and can implement the level output algorithm. In addition, multistage amplification is integrated in the RT990, high gain and high radio frequency output can be realized, and the error is small; two paths of RF buffers are integrated, and two paths of radio frequency output can be realized. In another preferred embodiment, the model of the CATV digitizing chip 311 may also be RT 930.

The input processing unit 312 includes a first seat J1, a first inductor L1, a second inductor L2, a third inductor L5, a fourth inductor L6, a fifteenth resistor R1, a sixteenth resistor R2, a fifth capacitor C1, a sixth capacitor C2, and a seventh capacitor C3. The first seat J1 is used to access an optical fiber, a first end of the first inductor L1 is electrically connected to the first seat J1, a second end of the first inductor L1 is electrically connected to a first end of the third inductor L5 and a first end of the fifth capacitor C1, a second end of the fifth capacitor C1 is electrically connected to the CATV digital chip 311, a second end of the third inductor L5 is electrically connected to a first end of the fifteenth resistor R1, a second end of the fifteenth resistor R1 is electrically connected to a first end of the seventh capacitor C3 and the power module 2, and a second end of the seventh capacitor C3 is grounded. A first end of the second inductor L2 is electrically connected to the first socket J1, a second end of the second inductor L2 is electrically connected to a first end of the sixth capacitor C2 and a first end of the fourth inductor L6, a second end of the sixth capacitor C2 is electrically connected to the CATV digitizing chip 311, a second end of the fourth inductor L6 is electrically connected to the CATV digitizing chip 311 and a first end of the sixteenth resistor R2, and a second end of the sixteenth resistor R2 is grounded. It can be understood that the first inductor L1 and the fifth capacitor C1, the second inductor L2 and the sixth capacitor C2 cooperate together to filter out harmonics, thereby enhancing the reliability of signal input.

Preferably, the output processing unit 313 includes a second seat J3, an equalizer T5, a seventh inductor L12, an eighth inductor L13, a seventeenth resistor R22, an eighteenth resistor R21, a nineteenth resistor R25, a twentieth resistor R26, a seventh capacitor C33, an eighth capacitor C34, a ninth capacitor C37, and a tenth capacitor C38. The electrical connection modes of the second seat J3, the equalizer T5, the seventh inductor L12, the eighth inductor L13, the seventeenth resistor R22, the eighteenth resistor R21, the nineteenth resistor R25, the twentieth resistor R26, the seventh capacitor C33, the eighth capacitor C34, the ninth capacitor C37, and the tenth capacitor C38 are shown in fig. 4, and are not described herein again. It can be understood that the second socket J3 is used for accessing a television, and the equalizer T5 is used for implementing unbalanced conversion between the output signal of the CATV digitizing chip 311 and the television, so as to enhance the stability and reliability of the television signal access.

Preferably, referring to fig. 6, the power module 2 includes a voltage-reducing unit 21 and a capacitor network unit 22; the voltage reducing unit 21 is electrically connected to the capacitor network unit 22, and the capacitor network unit 22 is electrically connected to the main control module 1 and the CATV digital control module 3, respectively. The structure and connection manner of the voltage reducing unit 21 and the capacitor network unit 22 are shown in fig. 6, and are not described herein again.

Preferably, referring to fig. 5, the interface communication unit 11 includes a fifth resistor R16, a sixth resistor R15, a seventh resistor R5, an eighth resistor R14, a ninth resistor R6, a tenth resistor R13, a second capacitor C15, and a third capacitor C14; a first end of the fifth resistor R16 and a first end of the sixth resistor R15 are electrically connected to the main control module 1, a second end of the fifth resistor R16 is electrically connected to a first end of the seventh resistor R5, a T _ SCL end of the CATV digitizing chip 311, a first end of the second capacitor C15 and a first end of the eighth resistor R14, a second end of the seventh resistor R5 is electrically connected to the CATV _ UTX end of the online programming unit 16 in the main control module 1, a second end of the eighth resistor R14 is electrically connected to the optical network control module 4 and the M _ SCL end of the online programming unit 16 in the main control module 1, a second end of the sixth resistor R15 is electrically connected to the T _ SDA end of the CATV digitizing chip 311, the first end of the third capacitor C14, the first end of the ninth resistor R6 and the first end of the tenth resistor R13, respectively, and a second end of the ninth resistor R6 is electrically connected to the first end of the CATV _ SCL end of the online programming unit 16 in the main control module 1, a second end of the tenth resistor R13 is electrically connected to the optical network control module 4 and the M _ SDA end of the online burning unit 16 in the main control module 1, and a second end of the second capacitor C15 and a second end of the third capacitor C14 are grounded. In this embodiment, the CATV digital control module 3 communicates with the main control module 1 through IIC, and the optical network control module 4 communicates with the main control module 1 through USART.

Example two

The utility model provides a OTA upgrading system, including the first aspect serial ports communication control circuit based on CATV.

To sum up, the utility model discloses a serial port communication control circuit and OTA upgrade system based on CATV, the serial port communication control circuit based on CATV includes main control module 1, power module 2, CATV digital control module 3, optical network control module 4 and mutual terminal 5; the power module 2 is respectively electrically connected with the main control module 1, the CATV digital control module 3 and the optical network control module 4; the main control module 1 comprises an interface communication unit 11; the CATV digital control module and the optical network control module 4 are respectively in communication connection with the main control module 1 through the interface communication unit 11; the CATV digital control module 3 is used for converting photoelectric signals; the optical network control module 4 reads the working state parameters of the main control module and transmits the working state parameters to the interactive terminal for real-time display; and the optical network control module 4 completes remote upgrade of the main control module 1 through the interactive terminal. Compared with the traditional coaxial cable and cable television, the CATV-FTTH has the advantages of low optical fiber transmission cost (the optical fiber material is cheaper than the coaxial cable and cable television), long transmission distance, small optical fiber transmission attenuation (less than 0.4dB/km), wide bandwidth and flexible protocol, and conforms to the large-scale application mode of operators. Furthermore, the utility model discloses only need update mutual terminal with new application and can upgrade, convenient and fast has significantly reduced the human cost. Therefore, the utility model has the advantages of long transmission distance, small attenuation, wide bandwidth, flexible protocol, convenience and quickness.

The serial port communication control circuit based on CATV provided by the present invention is introduced in detail, and a specific example is applied to explain the principle and the implementation manner of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, to the general technical personnel in this field, according to the utility model discloses an idea, all can have the change part on concrete implementation and application scope, to sum up, this description content only is the utility model discloses an embodiment, does not consequently restrict the utility model discloses a patent scope, all utilize the equivalent structure or the equivalent flow transform that the content of the description and the attached drawing did, or directly or indirectly use in other relevant technical fields, all the same reason is included in the utility model discloses a patent protection scope. And should not be construed as limiting the invention.

Claims (8)

1. Serial port communication control circuit based on CATV, characterized by, include: the system comprises a main control module, a power supply module, a CATV digital control module, an optical network control module and an interactive terminal; the power supply module is respectively and electrically connected with the main control module, the CATV digital control module and the optical network control module; the main control module comprises an interface communication unit; the CATV digital control module and the optical network control module are respectively in communication connection with the main control module through the interface communication unit; the CATV digital control module is used for converting photoelectric signals; the optical network control module reads the working state parameters of the main control module and transmits the working state parameters to the interactive terminal for real-time display; and the optical network control module completes remote upgrade of the main control module through the interactive terminal.

2. The CATV-based serial port communication control circuit according to claim 1, wherein the CATV digital control module includes a CATV digital control unit and an amplification unit; the CATV digital control unit is respectively electrically connected with the main control module, the optical network control module, the power supply module and the amplifying unit, and the amplifying unit is electrically connected with the main control module.

3. A CATV-based serial port communication control circuit according to claim 1, wherein the CATV digital control module communicates with the main control module via IIC, and the optical network control module communicates with the main control module via USART.

4. The CATV-based serial port communication control circuit according to claim 1, wherein the power supply module includes a voltage reduction unit and a capacitance network unit; the voltage reduction unit is electrically connected with the capacitance network unit, and the capacitance network unit is respectively and electrically connected with the main control module and the CATV digital control module.

5. The CATV-based serial port communication control circuit according to claim 2, wherein the CATV digital control unit includes a CATV digitizing chip, an input processing unit and an output processing unit; the input processing unit and the output processing unit are respectively and electrically connected with the CATV digital chip, and the CATV digital chip is respectively and electrically connected with the interface communication unit and the power supply module.

6. The CATV-based serial port communication control circuit according to claim 5, wherein the amplifying unit comprises a first operational amplifier, a first diode, a second diode, a first resistor, a second resistor, a third resistor, a fourth resistor and a first capacitor; a first end of the first resistor is electrically connected with the first operational amplifier, a second end of the first resistor is electrically connected with a first end of the first diode and a first end of the second resistor, a second end of the second resistor is electrically connected with a first end of the second diode, and a second end of the first diode and a second end of the second diode are electrically connected with the output processing unit; the first end of the third resistor and the first end of the fourth resistor are electrically connected with the first operational amplifier, the second end of the third resistor is grounded, the second end of the fourth resistor is electrically connected with the first end of the first capacitor and the main control module, and the second end of the first capacitor is grounded.

7. The CATV-based serial port communication control circuit according to claim 5, wherein the interface communication unit includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a second capacitor and a third capacitor; the first end of the fifth resistor and the first end of the sixth resistor are electrically connected with the main control module, the second end of the fifth resistor is electrically connected with the first end of the seventh resistor, the CATV digital chip, the first end of the second capacitor and the first end of the eighth resistor, a second end of the seventh resistor is electrically connected with the main control module, a second end of the eighth resistor is electrically connected with the optical network control module, the second end of the sixth resistor is electrically connected to the CATV digitizing chip, the first end of the third capacitor, the first end of the ninth resistor and the first end of the tenth resistor, a first end of the ninth resistor is electrically connected to the main control module, a second end of the tenth resistor is electrically connected to the optical network control module, and a second end of the second capacitor and a second end of the third capacitor are grounded.

8. An OTA upgrade system comprising a CATV-based serial communication control circuit according to any of claims 1-7.

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