CN212873488U

CN212873488U - High-speed wireless data acquisition card

Info

Publication number: CN212873488U
Application number: CN202021882992.2U
Authority: CN
Inventors: 徐熊; 钟华; 张宇; 付璀瑶; 李鸣
Original assignee: Nanchang University
Current assignee: Nanchang University
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2021-04-02
Anticipated expiration: 2030-09-01

Abstract

A high-speed wireless data acquisition card is composed of a data acquisition end and a data receiving end. The data acquisition end comprises a power supply module, a main control module, an AD conversion module, a wireless serial port module, a load control module and a data cache module; the data receiving end comprises a USB-to-TTL module, a wireless serial port module and a USB interface. The high-speed wireless data acquisition card is designed with 8 analog signal input channels, analog signals enter a data acquisition end of the data acquisition card through the input channels, the data acquisition end converts the analog signals into digital signals, and data acquired by the data acquisition end is sent to a data receiving end through a wireless serial port module. And the data receiving end receives data by adopting a wireless serial port module, and transmits the data to a special upper computer for system development by using a USB-to-TTL (transistor-transistor logic) module. The 8 channels of the data acquisition card can be synchronously acquired, and all the channels can be acquired in parallel. The data is stably transmitted to the upper computer through the high-speed wireless module, and meanwhile, the upper computer can configure the data acquisition card.

Description

High-speed wireless data acquisition card

Technical Field

The utility model relates to a data acquisition card can be used to industrial control neighborhood, data acquisition field, specifically indicates high-speed wireless data acquisition card.

Background

With the proposal of the china manufacturer 2025, the industrial control becomes more and more demanding, and meanwhile, the wireless communication technology is also urgently required in the aspects of rapid development, increasingly diverse application scenes, communication, automation, electronic measurement and the like. Because of the pressing need to control the neighborhood and the wide market, more and more businesses and individuals are working on this area of research. However, the data acquisition card on the market at present only aims at one aspect of data acquisition and transmission, and cannot be wireless, and in the aspect of synchronous acquisition, only an analog switch switching mode is adopted, so that real synchronous acquisition cannot be realized.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough and provide a high-speed wireless data acquisition card, the data accuracy that this data acquisition card gathered is high, sampling speed is fast, can 8 ways gather simultaneously, main control chip can connect the load, send the data of gathering to the host computer through high-speed wireless module reliable and stable, and the host computer can also carry out individualized configuration to data acquisition card simultaneously.

The utility model discloses technical scheme that the purpose was adopted is: a high-speed wireless data acquisition card comprises a data acquisition end, a data receiving end and an upper computer. The data acquisition end comprises a power module, a main control module, an AD conversion module, a wireless serial port module, a load control module and a data cache module; the data receiving end consists of a USB-to-TTL module, an AS69-T20 wireless serial port module and a USB interface.

Further, the model of an AD chip adopted by the AD conversion module is AD 7606; the model of the main control module is STM32F103RET 6; the model of the wireless serial port module is AS 69-T20.

Further, the data acquisition end and the data receiving end perform data transmission in a wireless transmission mode.

Furthermore, the user can perform personalized configuration on the data acquisition card through the upper computer.

Furthermore, the main control module is electrically connected with a load control module, a data cache module, a wireless serial port module, an AD conversion module and a power supply module.

Furthermore, the minimum system circuit design of the main control module is divided into a reset circuit, a clock circuit and a power circuit.

Further, the power conversion module outputs a 5V power supply and a 3.3V power supply respectively.

Furthermore, the data cache module uses an SD card for data storage, and exchanges data with the main control module through an SPI communication protocol.

The utility model has the advantages and beneficial effects that:

1. the data acquisition card adopts an AD conversion chip AD7606 of Adenono (ADI) semiconductor technology company, and the data acquisition card is provided with 8 analog signal input channels, wherein the 8 channels can synchronously acquire signals, and all the channels can sample at the speed of 200 kSPS. Meanwhile, the device is a 16-bit synchronous sampling AD chip, and the acquisition precision is high. And each channel is independent to collect signals, so that real synchronous transmission can be realized.

2. The data acquisition card uses the wireless transmission module, has high speed and flexible installation, does not need wiring, realizes data acquisition at a longer distance, and can enable the embedded system to be more flexibly applied to different scenes. Meanwhile, the module has three working states, the working states can be freely switched during operation, and more applicable scenes are provided.

3. The data acquisition card uses an STM32F103RET6 main control chip and simultaneously controls a load control module and a data cache module circuit, the cache of the acquisition card on the market is small at present, and the data cache circuit improves the problem of offline data cache of the data acquisition card. And the data acquisition card is connected with three load control ports, so that the use functions of the data acquisition card are enriched.

4. The data receiving end of the data acquisition card uses the USB-to-TTL circuit to provide safe encryption, so that client reference software is protected from being copied, and meanwhile, the upper computer can perform personalized configuration on the data acquisition card, so that the data acquisition card has wide development space.

Drawings

FIG. 1 is an overall scheme diagram of the high-speed wireless data acquisition card of the present invention;

FIG. 2 is a schematic diagram of the data acquisition end structure of the high-speed wireless data acquisition card of the present invention;

fig. 3 is a schematic diagram of the data receiving end structure of the high-speed wireless data acquisition card of the present invention.

In the figure: 1. an analog signal input interface; 2. a load control interface; 3. a wireless module antenna interface; 4. An equipment work indicator light; 5. an equipment switch key; 6. a power input interface; 7. a collection end equipment housing; 8. a main control board of the acquisition terminal; 9. a receiver device housing; 10. a receiving end main control board; 11. and a USB interface.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

A high-speed wireless data acquisition card is shown in figure 1. The data acquisition card consists of a data acquisition end, a data receiving end and an upper computer. The data acquisition end comprises a power module, a main control module, an AD conversion module, a wireless serial port module, a load control module and a data cache module; the data receiving end is composed of a USB-to-TTL module, a wireless serial port module and a USB interface. The system comprises a data acquisition end, a data acquisition end and a data acquisition end, wherein 8 analog signal input interfaces 1 are arranged at the upper end of an acquisition end equipment shell 7 of the data acquisition end, 4 analog signal input interfaces 1 are respectively arranged at the left side and the right side of the acquisition end, a wireless module antenna interface 3 is arranged in the middle of each analog signal input interface 1, a load control interface 2 is arranged at the left side of the data acquisition end, an equipment work indicator lamp 4, an equipment switch key 5 and a power supply input interface 6 are sequentially arranged at the right side of the acquisition end equipment shell 7 of the data acquisition end from top to bottom, and an acquisition end main control board 8 is; the data receiving end comprises a receiving end equipment shell 9, a receiving end main control board 10 is arranged in the receiving end equipment shell 9, the wireless module antenna interface 3 is arranged on the left side of the receiving end equipment shell 9, and a USB interface 11 is further arranged on the right side of the receiving end equipment shell 9.

Analog signals enter a data acquisition end of a data acquisition card through an analog signal input interface 1, the data acquisition end takes STM32F103RET6 as a main control chip, an analog-to-digital conversion chip AD7606 is controlled through an SPI communication protocol, the analog signals are converted into digital signals, an SD card is controlled through the SPI communication protocol to store data required by a user, a load control interface 2 is controlled, the data acquired by the data acquisition end is sent to a data receiving end through a wireless serial port module, the data receiving end receives the data through the wireless serial port module, the data are transmitted to a computer through a USB-to-TTL module, and a special upper computer is developed by the system. The 8 analog signal input interfaces 1 of the data acquisition card can synchronously acquire data, and all the interfaces can acquire data in parallel. The data is stably transmitted to the upper computer through the high-speed wireless module, and meanwhile, the upper computer can configure the data acquisition card.

After a user takes the device, the sensor is firstly connected to the analog signal input interface 1 of the data acquisition end of the high-speed data acquisition card, a power supply is plugged into the data acquisition end, the USB interface 11 of the data receiving end is plugged into a computer, then the data acquisition end and the data receiving end are started, finally, upper computer software is opened to configure the data acquisition card so as to meet the own requirements, and the acquisition can be started by clicking an upper computer acquisition button.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims

1. A high-speed wireless data acquisition card is characterized in that: the method comprises the following steps:

the system comprises a data acquisition end, a data receiving end and an upper computer;

the data acquisition end comprises an AD conversion module, a data cache module, a load control module, a main control module, a power supply module and a wireless serial port module;

the data receiving end comprises a USB-to-TTL module, a wireless serial port module and a USB interface;

and the data acquisition end and the data receiving end carry out data transmission through a wireless serial port module.

2. The high-speed wireless data acquisition card according to claim 1, wherein:

the AD conversion module is an AD chip with the model number of AD 7606;

the model of the main control module is STM32F103RET 6;

the model of the wireless serial port module is AS 69-T20.

3. The high-speed wireless data acquisition card according to claim 1, wherein:

and the data transmission mode of the data acquisition end and the data receiving end is wireless transmission.

4. The high-speed wireless data acquisition card according to claim 1, wherein:

and the user carries out personalized configuration on the data acquisition card through the upper computer.

5. The high-speed wireless data acquisition card according to claim 1, wherein:

the minimum system circuit design of the main control module is divided into a reset circuit, a clock circuit and a power circuit.

6. The high-speed wireless data acquisition card according to claim 1, wherein:

the power supply module is respectively used for outputting a 5V power supply and a 3.3V power supply.

7. The high-speed wireless data acquisition card according to claim 1, wherein:

the data cache module stores data by using an SD card and exchanges data with the main control module through an SPI communication protocol.