PCM gateway equipment

Abstract

The utility model belongs to the field of gateway equipment, and particularly relates to PCM gateway equipment. The device mainly comprises an FPGA module, a communication module, a PCM receiving module, a PCM receiving interface, a PCM sending module, a PCM sending interface and two communication interfaces. The FPGA module is provided with two communication ends, and the communication module is provided with two communication channels; one ends of two communication channels of the communication module are respectively connected with two communication ends of the FPGA module, and the other ends of the two communication channels of the communication module are respectively connected with the two communication interfaces; the output end of the PCM receiving module is connected with the receiving end of the FPGA module, and the input end of the PCM receiving module is connected with the PCM receiving interface; the input end of the PCM sending module is connected with the sending end of the FPGA module, and the output end of the PCM sending module is connected with the PCM sending interface. According to the utility model, the conversion among the PCM input signal, the PCM output signal and the communication signal can be realized at the same time, and the conversion between the PCM input signal and the communication signal can be independently used, or the conversion between the PCM output signal and the communication signal can be independently used.

Description

Technical Field

[0001] The utility model relates to a gateway device, in particular to a PCM gateway device. Background Art

[0002] PCM stands for Pulse Code Modulation, which modulates the signal in binary code. PCM telemetry is an important telemetry method in the aircraft test flight stage. The meaning of PCM telemetry is close measurement and long transmission. During the test flight, the signal collected inside the aircraft is processed and then sent through the PCM telemetry transmitter to the ground control station. The ground control station uses a PCM telemetry receiver to receive it, and finally restores the received signal for subsequent processing.

[0003] Existing PCM telemetry is usually implemented using PCM gateway devices. However, existing PCM gateway devices can only independently implement the conversion between PCM input signals or PCM output signals and communication signals, and have single functions, which is difficult to meet actual needs. Utility Model Content

[0004] The utility model aims to solve the technical problem that the existing PCM gateway equipment can only realize the conversion of PCM input signal or PCM output signal and communication signal separately, has single function and is difficult to meet the actual needs, and provides a PCM gateway equipment.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A PCM gateway device, which is special in that:

[0007] It includes an FPGA module, a communication module, a PCM receiving module, a PCM receiving interface, a PCM sending module, a PCM sending interface, a power supply module and two communication interfaces;

[0008] The FPGA module is provided with two communication terminals, and the communication module is provided with two communication channels;

[0009] One end of the two communication channels of the communication module is connected to the two communication ends of the FPGA module respectively, and the other end is connected to the two communication interfaces respectively;

[0010] The output end of the PCM receiving module is connected to the receiving end of the FPGA module, and the input end is connected to the PCM receiving interface;

[0011] The input end of the PCM sending module is connected to the sending end of the FPGA module, and the output end is connected to the PCM sending interface;

[0012] The power supply module is respectively connected with the FPGA module, the communication module, the PCM receiving module and the PCM sending module.

[0013] Further, one end of the two communication channels of the communication module is connected to the two communication ends of the FPGA module through the PCB respectively;

[0014] The output end of the PCM receiving module is connected to the receiving end of the FPGA module through the PCB, and the input end is connected to the PCM receiving interface through a differential signal to single-ended signal chip;

[0015] The input end of the PCM sending module is connected to the sending end of the FPGA module through the PCB, and the output end is connected to the PCM sending interface through a single-ended signal to differential signal chip.

[0016] Furthermore, the PCM receiving module is provided with two input terminals and two output terminals, the two output terminals are respectively connected to the receiving terminal of the FPGA module, and the two input terminals are respectively connected to the PCM receiving interface.

[0017] Furthermore, the PCM sending module is provided with two input terminals and two output terminals, the two input terminals are respectively connected to the sending terminal of the FPGA module, and the two output terminals are respectively connected to the PCM sending interface.

[0018] Furthermore, the communication module is an Ethernet communication module.

[0019] Furthermore, the communication module includes two PHY chips and two network transformers; the two PHY chips are respectively connected to two communication ends of the FPGA module, and are respectively connected to two communication interfaces through two network transformers.

[0020] The beneficial effects of the utility model are:

[0021] 1. The utility model provides a PCM gateway device. By setting two communication terminals in an FPGA module and two communication channels in the communication module, and then connecting the output terminal and the input terminal of the FPGA module to a PCM receiving module and a PCM sending module respectively, the conversion between PCM input signals, PCM output signals and communication signals can be realized simultaneously. The conversion between PCM input signals and communication signals can also be used alone, or the conversion between PCM output signals and communication signals can be used alone. The use is flexible and convenient.

[0022] 2. The utility model realizes dual-channel redundant design by designing the PCM receiving module and the PCM sending module to have two input terminals and two output terminals, thereby improving the reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1This is a schematic diagram of the structural principle of a PCM gateway device embodiment of the utility model (the power supply module is not shown in the figure);

[0024] Figure 2 This is a schematic diagram of the structure of a PCM gateway device embodiment of this embodiment;

[0025] Figure 3 A hardware circuit diagram of an FPGA module in a PCM gateway device control embodiment of the utility model;

[0026] Figure 4 A hardware circuit diagram of an Ethernet communication module in a PCM gateway device embodiment of the utility model;

[0027] Figure 5 A hardware circuit diagram of a power supply module in a PCM gateway device embodiment of the utility model;

[0028] Figure 6 It is a hardware circuit diagram of a PCM sending module in a PCM gateway device embodiment of the utility model;

[0029] Figure 7 It is a hardware circuit diagram of a PCM receiving module in a PCM gateway device embodiment of the utility model.

[0030] In the figure: 1-PCM receiving interface, 2-PCM sending interface, 3-communication interface, 4-hardware circuit, 5-housing. DETAILED DESCRIPTION

[0031] In order to make the purpose, advantages and features of the utility model clearer, the PCM gateway device proposed by the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following specific implementation methods, the advantages and features of the utility model will be clearer.

[0032] See also Figure 1 and Figure 2 The present embodiment provides a PCM gateway device, which specifically includes a housing 5, a hardware circuit 4 installed inside the housing 5, a PCM receiving interface 1 and a PCM sending interface installed on one side of the housing 5, and two communication interfaces 3 installed on the other side of the housing 5.

[0033] The hardware circuit 4 mainly includes an FPGA module, a communication module, a PCM receiving module, a PCM sending module, a power supply module, and the like.

[0034] Specifically, two communication terminals are provided on the FPGA module, and two communication channels are provided on the communication module. The two communication terminals of the FPGA module are respectively connected to the two communication channels of the communication module through the PCB, and then the communication module is respectively connected to the two RJ45 communication interfaces. The two RJ45 communication interfaces support 10M, 100M or 1000M adaptive communication, and can be connected to the computer by connecting the network cable.

[0035] The FPGA module is mainly composed of FPGA chips and FPGA hardware circuits. Figure 2 , the FPGA hardware circuit is mainly composed of a power supply circuit and a clock circuit. The clock circuit provides an active crystal oscillator for the FPGA chip. The Ethernet communication control pin and the PCM receiving and transmitting pin are connected to the FPGA common IO pin. The FPGA chip adopts a Xilinx chip. The FPGA chip has been widely used in other industries. This embodiment only applies it to the field of PCM gateway equipment, and adopts general FPGA logic programming (see [Yu Hongjuan, Pan Song. Application and Development of FPGA Technology. Hangzhou Dianzi University, 2006, Vol. 26, No. 3: 20 pages]) to realize PCM encoding and PCM decoding design. The PCM encoding module forms a PCM main frame according to the PCM format configuration and grid configuration, and converts the data received by Ethernet into a PCM serial code stream; the PCM decoding module parses the PCM data according to the PCM format configuration, and converts the input PCM serial code stream into Ethernet data for transmission.

[0036] The communication module in this embodiment is an Ethernet communication module, which specifically includes two PHY chips and two network transformers; the circuit of the PHY chip is shown in FIG. Figure 3 , and the reset of the two PHY chips is controlled by the FPGA chip. The two PHY chips are respectively connected to the two communication terminals of the FPGA module, and are respectively connected to the two RJ45 communication interfaces through two network transformers.

[0037] See also Figure 6 The PCM receiving module is provided with two input terminals and two output terminals, that is, the PCM receiving module is a dual-channel structure. The two output terminals of the PCM receiving module are connected to the receiving terminal of the FPGA module through the PCB, and the two input terminals are connected to the PCM receiving interface through a differential signal to single-ended signal chip.

[0038] See also Figure 5 The PCM sending module is provided with two input terminals and two output terminals, that is, the PCM sending module is a dual-channel structure. The two input terminals of the PCM sending module are connected to the sending terminal of the FPGA module through the PCB, and the two output terminals are connected to the PCM sending interface through a single-ended signal to differential signal chip.

[0039] The power supply module is connected to the FPGA module, communication module, PCM receiving module and PCM sending module respectively. The main function of the power supply module is to provide the required voltage to each functional module. The hardware circuit is as follows: Figure 4 As shown, the input DC 5V is converted into DC 1.2V, 3.3V and 0.75V. At the same time, attention should be paid to the power-on timing problem when designing the power supply, and the power supply module is used to provide power guarantee for the entire device.

Claims

1. A PCM gateway device, characterized in that: It includes an FPGA module, a communication module, a PCM receiving module, a PCM receiving interface, a PCM sending module, a PCM sending interface, a power supply module and two communication interfaces; The FPGA module is provided with two communication terminals, and the communication module is provided with two communication channels; One end of the two communication channels of the communication module is connected to the two communication ends of the FPGA module respectively, and the other end is connected to the two communication interfaces respectively; The output end of the PCM receiving module is connected to the receiving end of the FPGA module, and the input end is connected to the PCM receiving interface; The input end of the PCM sending module is connected to the sending end of the FPGA module, and the output end is connected to the PCM sending interface; The power supply module is respectively connected with the FPGA module, the communication module, the PCM receiving module and the PCM sending module.

2. A PCM gateway device according to claim 1, characterized in that: One end of the two communication channels of the communication module is connected to the two communication ends of the FPGA module through the PCB respectively; The output end of the PCM receiving module is connected to the receiving end of the FPGA module through the PCB, and the input end is connected to the PCM receiving interface through a differential signal to single-ended signal chip; The input end of the PCM sending module is connected to the sending end of the FPGA module through the PCB, and the output end is connected to the PCM sending interface through a single-ended signal to differential signal chip.

3. A PCM gateway device according to claim 1 or 2, characterized in that: The PCM receiving module is provided with two input terminals and two output terminals, the two output terminals are respectively connected to the receiving terminal of the FPGA module, and the two input terminals are respectively connected to the PCM receiving interface.

4. A PCM gateway device according to claim 3, characterized in that: The PCM sending module is provided with two input terminals and two output terminals, the two input terminals are respectively connected to the sending terminal of the FPGA module, and the two output terminals are respectively connected to the PCM sending interface.

5. A PCM gateway device according to claim 1, characterized in that: The communication module is an Ethernet communication module.

6. A PCM gateway device according to claim 5, characterized in that: The communication module includes two PHY chips and two network transformers; The two PHY chips are respectively connected to the two communication terminals of the FPGA module, and are respectively connected to the two communication interfaces through two network transformers.

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