CN208012754U - A kind of data collecting card suitable for optical fiber vibration sensing - Google Patents

Abstract

The utility model relates to a data acquisition card suitable for optical fiber vibration sensing, comprising a dual-channel analog-to-digital converter ADC, an FPGA data acquisition storage unit, a DSP and ARM dual-core data processing unit, a data transmission unit and a power supply unit, wherein the dual-channel The analog-to-digital converter ADC of the channel is connected to the FPGA data acquisition and storage unit, the FPGA data acquisition and storage unit is connected to the DSP and ARM dual-core data processing unit, the DSP and ARM dual-core data processing unit is connected to the data transmission unit, and the power supply unit is connected to the dual-channel analog Power supply for digital converter ADC, FPGA data acquisition and storage unit, DSP and ARM dual-core data processing unit.

Description

A Data Acquisition Card Suitable for Optical Fiber Vibration Sensing

technical field

The present invention relates to the technical field of data acquisition and processing, and more specifically, to a data acquisition card suitable for optical fiber vibration sensing.

Background technique

Traditional data acquisition systems often use single-chip microcomputers or digital signal processors (DSP) as controllers to control the work of analog/digital converters (ADC), memory and other peripheral circuits. However, due to the impact of the instruction cycle and processing speed of the microcontroller itself, its clock frequency is low, and various functions must be realized by running software. The software running time occupies a large proportion of the entire sampling time, and the efficiency is low. It is difficult to meet the system's requirements for real-time and synchronization of the data acquisition system. Although the data acquisition system based on DSP has a fast processing speed, the cost is relatively high. Moreover, too frequent interruptions will reduce the efficiency of the CPU and deteriorate the response speed.

Contents of the invention

Based on the idea that FPGA can perform high-speed parallel data acquisition and DSP and ARM dual-core data sharing, the present invention provides a data acquisition card suitable for optical fiber vibration sensing, which can realize the real-time and synchronous requirements of the system for data processing and acquisition , to achieve high-speed parallel processing of data by multiple modules. The data collected by the acquisition card provided by the present invention can judge the external force damage around the optical cable in real time, thereby intelligently identifying the degree of threat of external force intrusion, and improving the alarm accuracy of current monitoring equipment in this field.

For realizing above-mentioned purpose of the invention, the technical scheme that adopts is:

A data acquisition card suitable for optical fiber vibration sensing, including a dual-channel analog-digital converter ADC, FPGA data acquisition storage unit, DSP and ARM dual-core data processing unit, data transmission unit and power supply unit, wherein the dual-channel analog-digital The converter ADC is connected to the FPGA data acquisition storage unit, the FPGA data acquisition storage unit is connected to the DSP and ARM dual-core data processing unit, the DSP and ARM dual-core data processing unit is connected to the data transmission unit, and the power supply unit is connected to the dual-channel analog-to-digital converter ADC , FPGA data acquisition storage unit, DSP and ARM dual-core data processing unit power supply.

Preferably, the FPGA data acquisition storage unit is connected to the DSP and ARM dual-core data processing unit through a parallel port peripheral uPP. UPP is used to realize the communication between FPGA data acquisition storage unit and DSP and ARM dual-core data processing unit. uPP is a multi-channel high-speed parallel interface with dedicated data lines and minimum control signals.

Preferably, the power supply unit includes a 5V power supply and three TPS54331DR chips connected to the 5V power supply, and the 5V power supply is respectively supplied to the dual-channel analog-to-digital converter ADC, FPGA data acquisition storage unit, DSP and ARM dual-core data processing unit. The power supply voltage is reduced to 1.2V, 2.5V, and 3.3V by three parallel TPS54331DR chips for the use of the response module.

Preferably, the shown data transmission unit adopts a LAN8710A module, and the DSP and ARM dual-core data processing unit is provided with a MII interface for connecting with the LAN8710A module.

Preferably, the connection between the DSP and the ARM is realized through an interrupt register.

The FPGA data acquisition storage unit collects data through the dual-channel analog-to-digital converter ADC, and then transmits the collected data to the memory in the FPGA data acquisition storage unit, and the data storage module A and data storage B in the FPGA data acquisition storage unit The module stores and accumulates the data, the data sending module A and the data sending B module are responsible for reading the data in the memory to the uPP bus, and transmit the data to the DSP and the ARM dual-core data processing unit at high speed through the uPP bus, and realize the DSP through the interrupt register Communication with ARM, the data is transmitted to the host computer by DSP and ARM dual-core data processing unit through MII interface, LAN8710A, RJ45 channel.

Description of drawings

Figure 1 is a schematic diagram of the structure of the acquisition card.

Fig. 2 is a schematic structural diagram of the power supply unit.

Detailed ways

The accompanying drawings are for illustrative purposes only and cannot be construed as limiting the patent;

The present invention will be further elaborated below in conjunction with the accompanying drawings and embodiments.

Example 1

As shown in Figure 1, a data acquisition card suitable for optical fiber vibration sensing includes a dual-channel analog-to-digital converter ADC, FPGA data acquisition and storage unit, DSP and ARM dual-core data processing unit, data transmission unit and power supply unit, Among them, the dual-channel analog-to-digital converter ADC is connected to the FPGA data acquisition and storage unit, the FPGA data acquisition and storage unit is connected to the DSP and ARM dual-core data processing unit, the DSP and ARM dual-core data processing unit is connected to the data transmission unit, and the power supply unit is connected to the dual-channel The advanced analog-to-digital converter ADC, FPGA data acquisition and storage unit, DSP and ARM dual-core data processing unit are powered.

In this embodiment, the FPGA data acquisition storage unit is connected to the DSP and ARM dual-core data processing unit through the parallel port peripheral uPP. UPP is used to realize the communication between FPGA data acquisition storage unit and DSP and ARM dual-core data processing unit. uPP is a multi-channel high-speed parallel interface with dedicated data lines and minimum control signals.

In this embodiment, as shown in Figure 2, the power supply unit includes a 5V power supply and three TPS54331DR chips connected to the 5V power supply, and the 5V power supply is respectively supplied to a dual-channel analog-to-digital converter after being stepped down by the three TPS54331DR chips ADC, FPGA data acquisition storage unit, DSP and ARM dual-core data processing unit. The power supply voltage is reduced to 1.2V, 2.5V, and 3.3V by three parallel TPS54331DR chips for the use of the response module.

In this embodiment, the data transmission unit shown adopts the LAN8710A module, and the DSP and ARM dual-core data processing unit is provided with a MII interface for connecting with the LAN8710A module.

In this embodiment, the connection between the DSP and the ARM is realized through an interrupt register.

Its specific working process is as follows: the FPGA data acquisition storage unit collects data through the dual-channel analog-to-digital converter ADC, and then transmits the collected data to the memory in the FPGA data acquisition storage unit, and the data in the FPGA data acquisition storage unit The save A module and the data save B module store and accumulate the data, the data send A module and the data send B module are responsible for reading the data in the memory to the uPP bus, and transmit the data to the DSP and ARM dual-core data processing unit at high speed through the uPP bus , The communication between DSP and ARM is realized through the interrupt register, and the data is transmitted to the host computer by the DSP and ARM dual-core data processing unit through the MII interface, LAN8710A, and RJ45 channels.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (5)

1. A data acquisition card suitable for optical fiber vibration sensing, characterized in that: comprise dual-channel analog-to-digital converter ADC, FPGA data acquisition storage unit, DSP and ARM dual-core data processing unit, data transmission unit and power supply unit, Among them, the dual-channel analog-to-digital converter ADC is connected to the FPGA data acquisition and storage unit, the FPGA data acquisition and storage unit is connected to the DSP and ARM dual-core data processing unit, the DSP and ARM dual-core data processing unit is connected to the data transmission unit, and the power supply unit is connected to the dual-channel The advanced analog-to-digital converter ADC, FPGA data acquisition and storage unit, DSP and ARM dual-core data processing unit are powered. 2. The data acquisition card suitable for optical fiber vibration sensing according to claim 1, characterized in that: the FPGA data acquisition storage unit is connected with the DSP and the ARM dual-core data processing unit through the parallel port peripheral uPP. 3. The data acquisition card suitable for optical fiber vibration sensing according to claim 1, characterized in that: the power supply unit includes a 5V power supply and three TPS54331DR chips connected to the 5V power supply, and the 5V power supply is provided through the three TPS54331DR chips After stepping down, power is supplied to the dual-channel analog-to-digital converter ADC, FPGA data acquisition and storage unit, DSP and ARM dual-core data processing unit. 4. The data acquisition card suitable for optical fiber vibration sensing according to claim 1, characterized in that: the shown data transmission unit adopts the LAN8710A module, and the DSP and ARM dual-core data processing unit are provided with a MII interface for connecting with the LAN8710A module connection. 5. The data acquisition card suitable for optical fiber vibration sensing according to claim 1, characterized in that: the connection between the DSP and the ARM is realized through an interrupt register.