CN209803784U

CN209803784U - Multifunctional data acquisition card based on USB

Info

Publication number: CN209803784U
Application number: CN201920535570.9U
Authority: CN
Inventors: 孙道宇; 李丙玉; 李汉清
Original assignee: Jilin Zhichen Photoelectric Technology Co Ltd
Current assignee: Jilin Zhichen Photoelectric Technology Co Ltd
Priority date: 2019-04-19
Filing date: 2019-04-19
Publication date: 2019-12-17
Anticipated expiration: 2029-04-19

Abstract

the utility model discloses a multifunctional data acquisition card based on USB, the data acquisition interface is divided into a synchronous acquisition data interface, an asynchronous data acquisition interface, a LVDS data acquisition interface and a custom data acquisition interface; the synchronous data acquisition interface and the asynchronous data acquisition interface are connected with a signal acquisition end of the FPGA main control module through an RS422 communication module; the LVDS data acquisition interface and the custom data acquisition interface are directly connected with a signal acquisition end of the FPGA main control module; the power supply end of the power supply module is connected with the power interface, and the power transmission end of the power supply module is respectively connected with the RS422 communication module, the FPGA main control module, the SDRAM storage module and the USB microcontroller for power supply; the FPGA main control module is connected with the SDRAM storage module for information storage; the FPGA main control module is communicated with the USB microcontroller; the USB microcontroller is communicated with the USB interface; and the FPGA main controller uploads the acquired data to the upper computer software through the USB interface circuit. The utility model has the advantages of many data interfaces, can regard as data generator to use, etc.

Description

Multifunctional data acquisition card based on USB

Technical Field

The utility model relates to an electronic data gathers the field, concretely relates to multi-functional data collection card based on USB.

Background

In recent years, in order to meet the demand of computers for data acquisition and control, a great number of manufacturers at home and abroad produce various data acquisition cards. With the rapid development of the information society, signal-to-signal processing techniques become very important. Data acquisition as a preliminary work in digital signal processing plays a critical, or even decisive role in the overall digital signal system. The field of real-time signal processing, digital image processing and the like has increasingly greater requirements on high-speed and high-precision data acquisition cards.

Due to the wide application of computers, data acquisition is of great importance, and the computer is a bridge connected with the outside. The difficulty degree of various types of signal acquisition is very different, and the data acquisition card acquires non-electric quantity or electric quantity signals from the unit to be tested and transmits the signals to the upper computer for analysis and processing.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a data interface is many, can receive asynchronous serial data, synchronous serial data and self-defined LVDS data, can customize the multi-functional data acquisition card based on USB who changes the interface in a flexible way.

In order to solve the technical problem, the acquisition card includes power module, RS422 communication module, SDRAM storage module, USB microcontroller, FPGA host system, data acquisition interface, power source, USB interface.

the data acquisition interface is divided into a synchronous data acquisition interface, an asynchronous data acquisition interface, an LVDS data acquisition interface and a custom data acquisition interface;

The synchronous data acquisition interface and the asynchronous data acquisition interface are connected with a signal acquisition end of the FPGA main control module through an RS422 communication module;

The LVDS data acquisition interface and the custom data acquisition interface are directly connected with a signal acquisition end of the FPGA main control module;

The power supply end of the power supply module is connected with the power interface, and the power transmission end of the power supply module is respectively connected with the RS422 communication module, the FPGA main control module, the SDRAM storage module and the USB microcontroller for power supply;

the FPGA main control module is connected with the SDRAM storage module for information storage;

the FPGA main control module is communicated with the USB microcontroller; the USB microcontroller is communicated with the USB interface; and the FPGA main controller uploads the acquired data to the upper computer software through the USB interface circuit.

furthermore, the FPGA main control module selects an FPGA with the model number of EP4CE6F256 manufactured by ALTERA company.

further, the USB microcontroller is of a type CY7C 68013A.

further, the USB interface is EZ-USB FX 2.

Further, the user-defined data acquisition interface is a parallel data acquisition interface.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the data acquisition interface is abundant, and can deal with most data acquisition.

2. Not only can carry out data acquisition, can also regard as data generator to use simultaneously.

3. The LVDS data and the RS422 data can be generated and sent to the outside through the data interface, and the data generated inside the acquisition card can be sent to the outside according to the external requirement on the required signal.

Drawings

Fig. 1 is a block diagram of the present invention.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

as shown in FIG. 1, the acquisition card comprises a power module, an RS422 communication module, an SDRAM storage module, a USB microcontroller with the model of CY7C68013A, an FPGA main control module with the model of ALTERA company of EP4CE6F256, a data acquisition interface, a power interface, and a USB interface of EZ-USB FX 2.

The data acquisition interface is divided into a synchronous data acquisition interface, an asynchronous data acquisition interface, an LVDS data acquisition interface and a custom data acquisition interface (parallel data acquisition interface);

If the collected data is RS422 data, the data comes first through the data interfacethe RS422 module is composed of a driving chip and a receiving chip DS26LV31TM and DS26LV32 ATM. The DS26LV31TM chip has low quiescent current I_CCThe DS26LV32ATM chip has low quiescent current I of 9mA_CCIs 125uA, making it suitable for power consumption sensitive applications. The module can complete synchronous data acquisition and transmission of 3 channels or asynchronous data acquisition and transmission of 4 channels. The R422 module is controlled by the FPGA main control chip, and the RS422 module transmits the acquired data to the FPGA main control module.

if the acquired data is LVDS data, the data is directly transmitted to the FPGA main control chip module.

And finally, if the data received by the custom data interface is data such as parallel data acquisition and the like, the data is also directly transmitted to the FGPA master control module.

And the FPGA main control module selects an FPGA with the model number of EP4CE6F256 manufactured by ALTERA company. The advantage of adopting FPGA as main control chip can directly receive LVDS data, and some self-defined data, and the configuration is convenient, and interface quantity is sufficient, enough deals with most data reception and control. And the FPGA is provided with a 16 MX 8bits SDRAM storage module. Data may be temporarily stored in SDRAM if data is collected too quickly.

After the data are received by the FPGA main control chip, the FPGA main control chip converts the data into USB data through FIFO and transmits the USB data to the upper computer through the USB interface by controlling the USB microcontroller. Where the USB interface is the EZ-USB FX2 we choose. The USB microcontroller has the following model: CY7C68013A, chip working voltage of 3.3V, USB2.0 transceiver, SIE and enhanced 8051 microprocessor, wherein the chip has 8-bit or 16-bit data interface, clock frequency up to 48MHz, intelligent serial interface engine, and integrated I²C compatible controller, four integrated FIFOs. And up to 40 general purpose I/O pins.

And finally, uploading the data to an upper computer through a USB2.0 interface.

The power module needs 3 voltages, which are respectively 1.2V, 2.5V and 3.3V for power supply. In the power supply part, the DC-DC model used by 3.3V and 1.2V power supplies is SY8088, the maximum working current of 1A can be reached, and the LDO model used by the 2.5V power supply is TLV 70025. The power supply mode can be divided into two modes, one mode is that an external 5V stabilized power supply directly supplies power, and the other mode is that a USB (universal serial bus) line is directly connected with a computer to directly supply 5V voltage without an additional power supply.

The data of various interfaces can be collected, the FPGA is used as a core control chip, asynchronous serial port data can be received, the transmission rate can reach 8BPS at the fastest speed, synchronous serial port data can be received, the transmission rate can reach 8BPS at the fastest speed, LVDS data and a user-defined data interface can also be received, and the data transmission speed can reach hundreds of megabits. The change interface can be flexibly customized. The device can also be used as a data generator to send required data to the outside. The method can be widely applied to image acquisition and self-development data acquisition terminals.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Various modifications and improvements made to the technical solution of the present invention by those skilled in the art are intended to fall within the scope of the present invention as defined in the appended claims. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. the utility model provides a multi-functional data acquisition card based on USB which characterized in that: the acquisition card comprises a power supply module, an RS422 communication module, an SDRAM storage module, a USB microcontroller, an FPGA main control module, a data acquisition interface, a power supply interface and a USB interface;

2. The USB-based multifunctional data acquisition card according to claim 1, wherein: the FPGA main control module selects an FPGA with the model number of EP4CE6F256 manufactured by ALTERA company.

3. The USB-based multifunctional data acquisition card according to claim 1, wherein: the USB microcontroller is CY7C 68013A.

4. The USB-based multifunctional data acquisition card according to claim 1, wherein: the USB interface is EZ-USB FX 2.

5. the USB-based multifunctional data acquisition card according to claim 1, wherein: the user-defined data acquisition interface is a parallel data acquisition interface.