CN201054091Y - Data collection and transmission control system - Google Patents

Abstract

The utility model discloses a data acquisition transmission control system which comprises a chassis, a power supply, a data acquisition module, an embedded processor, a display and an external equipment interface. The data acquisition module comprises an analog signal acquisition module and a single conversion module. The analog signal acquisition module correspondingly connects in series with the data pin of the signal conversation module. The working voltage pin of the signal conversation module is correspondingly connected in parallel with the ground pin, and then is plugged into the power supply. The signal conversation module is plugged into the embedded processor. The voltage input end and the grounding end of the embedded processor are plugged into the power supply. The display is connected with the embedded processor. The voltage input end and the grounding end of the display are plugged into the power supply. The utility model has the advantages of full intelligence, low power, high stability, automatic work and remote software update and so on.

Description

Data Acquisition and Transmission Control System

technical field

The utility model relates to a data collection and transmission control system.

Background technique

In today's development of data transmission control systems using ARM boards, there are common problems such as system compatibility instability, discontinuous transmission, frequent crashes, etc. Generally speaking, the stability is not high. In addition, in terms of practicability and scalability, because some systems were designed in the early stage, the functions cannot keep up with today's requirements.

Utility model patent 02285316.2 discloses an automatic data collection and transmission device, including a housing, which is composed of a power supply in the housing, a main controller, a control interface, a communication module, a display integrated on the housing, and an external device interface; the external device interface Including power interface, button, telephone interface, scanner interface and speaker; the control interface integrates main control circuit, communication control circuit, display control circuit, auxiliary circuit and main controller reset circuit; the stability and practicability of this technical solution are not high.

Contents of the invention

The utility model provides a data acquisition and transmission control system, which can realize automatic work without a person on duty, and supports counter-control of lower-end instruments.

A data acquisition and transmission control system, including a chassis, a power supply, a data acquisition module, an embedded processor, a display screen and an external device interface, the data acquisition module includes an analog signal acquisition module and a signal conversion module, an analog signal acquisition module and The data pins of the signal conversion module are connected in series, and the working voltage pins and ground pins are connected in parallel to connect to the power supply; the signal conversion module is connected to the embedded processor; the voltage input terminal and ground terminal of the embedded processor are connected to the power supply ; The display screen is connected to the embedded processor, and the voltage input terminal and the ground terminal of the display screen are connected to the power supply.

Described embedded processor comprises:

The initialization module completes the initialization setting of each port, reads in the parameter values of the database, and makes the program start and run normally;

The data receiving module receives the 485 signal data transmitted by the signal conversion module, and separates the data of the eight channels in the analog signal acquisition module;

The data processing module converts the analog value of each channel into the real value of the instrument and writes it into the database;

The data display module displays the data processed by the data processing module;

Data transmission module, which packs data into various formats and transmits them to designated locations;

The data statistics module realizes the output of reports, alarm query, historical data query, year-month-day average and cumulative value calculation.

The embedded processor has a built-in real-time clock.

The embedded processor has a built-in watchdog timer.

The embedded processor has a built-in alarm device.

The external device interface includes a data interface, an analog interface, a network interface, a USB interface, and a communication interface.

The utility model has 8 standard channels, which can be expanded to 255 channels at most, and can form a multi-channel measurement and processing system with digital multimeters and instruments with IEEE-485 interfaces. The utility model has the characteristics of full intelligence, low power consumption, high stability, unattended, fully automatic work, and remote software upgrade. In terms of network communication, it supports CDMA/1X, GPRS, network communication methods and short link methods. The utility model has standard voltage, current and other analog and switch interfaces, supports the interface between the system and the primary instrument, and can implement anti-control for the lower instrument by matching the protocol with the lower system, and at the same time realize the module (plug-in) for the data interface. Type) customization, interface electrical standards support RS-232, PS-485, USB1.1-2.0, Ethernet, etc.

Description of drawings

Fig. 1 is the system structure schematic diagram of the present utility model;

Fig. 2 is the structural representation of the system module of the present utility model;

Fig. 3 is the module structure schematic diagram of the utility model embedded processor;

Fig. 4 is the utility model control flowchart.

Detailed ways

As shown in Figures 1 and 2, a data acquisition and transmission control system includes a chassis, a power supply, a data acquisition module, an embedded processor, a display screen, and an external device interface. The data acquisition module includes an analog signal acquisition module and a signal conversion module. The data pins (DATA+, DATA-) of the analog signal acquisition module and the signal conversion module are correspondingly connected in series, and their working voltage pins (+Vs) and ground pins (GND) are correspondingly connected in parallel and connected to the 12V power supply (+, -) terminal; the serial port interface (TXD, RXD, GND) of the signal conversion module is connected to the COM2 terminal of the embedded processor; the voltage input terminal (V) and ground terminal (GND) of the embedded processor are connected to the (+, - ) terminal; the 26-pin LCD interface of the display screen is connected to the LCD interface of the embedded processor, and its working voltage (V) terminal and ground (GND) terminal are respectively connected to the (+, -) terminal of the power supply 12V, and the I-7017 module The eight channels (Vin7+, Vin7-...Vin1+, Vin1-) are connected to the signal from the meter.

As shown in Figure 3, the embedded processor is equipped with:

The initialization module completes the initialization setting of each port, reads in the parameter values of the database, and makes the program start and run normally;

The data receiving module receives the 485 signal data transmitted by the signal conversion module, and separates the data of the eight channels in the analog signal acquisition module;

The data processing module converts the analog value of each channel into the real value of the instrument and writes it into the database;

The data display module displays the data processed by the data processing module;

Data transmission module, which packs data into various formats and transmits them to designated locations;

The data statistics module realizes the output of reports, alarm query, historical data query, year-month-day average and cumulative value calculation.

Embedded processors have built-in real-time clocks.

The embedded processor has a built-in watchdog timer.

The embedded processor is equipped with an alarm device and has an alarm function. Each channel can set the upper and lower alarm limits, and the alarm function can be turned on or off according to the set alarm upper and lower limits.

Among them, the embedded processor uses the development board model ARMSYS2410, and its specific parameters are as follows:

CPU: Model S3C2410A-20 processor, operating frequency up to 203MHz;

Flash Memory: 64MB Nand Flash, optional 16MB, 32MB or 128MB NandFlash, built-in battery, when the external AC220V power failure, the internal battery can ensure that the historical data will not be lost.

SDRAM: 2 pieces of 4Banks×4Mbits×16bits SDRAM, compatible with PC100/pc133;

4 programmable green SMD LEDs;

Clock crystal oscillator: 12MHz system external constant source; 32.768KHz RTC clock source;

With watchdog timer;

8-channel 10-bit ADC, 2 of which can be used as touch screen interface;

SO-DIMM200 core board interface, the size of the wrench is about 68mm×42mm;

Data interface: 2-way RS-232, 1-way RS-485;

Network interface: 10BaseT;

USB interface: 2-way USB interface;

Working power supply: 5V DC

The data acquisition module includes an analog signal acquisition module and a signal conversion module. The analog signal acquisition module uses ICP DAS I-7017, and the signal conversion module uses BS-RTU2015. The specific technical parameters are as follows:

ICP DAS I-7017:

Channel: 8-way differential or 6-way differential + 2-way single-ended (jumper selection)

Resolution: 16 bits

Input type: mV, V, mA (connected to 250Ω external resistance)

Input range: ±150mV, ±500mV, ±1V, ±5V, ±10V, ±20mA

Sampling rate: 10 times/second (total)

Bandwidth: 15.7Hz

Accuracy: ±0.1%

Zero drift: ±20μV/℃

Full scale drift: ±25ppm/℃

CMR@50/60Hz: 86dBmin

NMR@50/60Hz: 100dB

Output impedance: 20MΩ

Overvoltage protection: ±35V

Isolation: 3000V DC

Input: +10～+30V DC

Power Consumption: 1.3W

BS-RTU2015:

INPUT/OUTPUT: RS232 RS-422/RS485

Speed (bps): 1200, 2400, 4800, 9600, 19.2k, 38.4k

Power supply (DC): +10v to+30v (Non-regulated)

Temperature range: -20～60℃

The display screen is a 7.8″ STN LCD screen with a 26-pin interface, which is compatible with the 26-pin LCD interface on the embedded processor. It is also equipped with a touch screen, which is convenient for viewing information and setting parameters, etc.:

The main technical specifications of the 7.8″STN LCD screen are as follows:

Type: STN

Dimensions: 7.8″

Color: 256 colors

Resolution: 640×3(RGB)×480

Backlight: 1 CCFT

Display Type: Transmissive

Vertical viewing angle range: -30 to +20 degrees

Horizontal viewing angle range: -45 to +45 degrees

Viewing direction: 6 O'clock

Brightness: 60cd/m2

Supporting offer: LCD data files

LCD adapter board (includes backlight inverter)

The power supply is mainly used to supply power to embedded processors, LCD screens, data acquisition modules, etc. The input voltage of the embedded processor ARM9 is 5V, the operating voltage of the LCD screen is 12V, and the signal conversion module 2015 and the analog signal acquisition module 7017 have a wide voltage input of 10V-30V. Based on the above voltage range, choose a switching power supply with the model D-60A. The main technical parameters are as follows:

The output voltage of +5V and COM terminal is: DC5V, the output current is 0.3-6.0A;

The output voltage of +V and COM terminals is DC12V, and the output current is 0.2-4.0A;

L and N are the input ends of the 220V power supply.

The external device interface includes data interface, analog interface, network interface, USB interface, and communication interface. Each channel is used as a backup or in parallel, so as to realize multi-channel communication and real-time online communication.

The system is connected and controlled with the lower-level instrumentation system through the 232/485 interface, and the signal acquisition is realized through the industrial data acquisition module. It can be connected with the upper-level system through broadband, dial-up network, GPRS/CDMA wireless network, and the country, Zhejiang Province, Hangzhou City and Customize a variety of data transmission protocols, which are highly adaptable and industry-expandable. The application interface of the system adopts the standard WinCE style, and realizes the output and printing of standard reports through Office automation technology, which brings great convenience to users.

Before the system works, first find the analog signal acquisition module, and set it according to the following requirements:

a) Address: 1

b) Input range: +/-5V

c) Resistor selection: 250Ω resistance

The signal conversion module is connected to the serial port 2 (COM2 pin) on the ARM development board. The serial port line adopts a crossover line. If the collected signal is a standard current output signal of 4-20mA, a 250Ω resistor is connected to the channel port; if If the collected voltage signal is 0-5V, there is no need to short-circuit the resistor.

When the system is officially running, the data acquisition module collects the signals transmitted by the instrument once (including 0-5V, 4-20mA, switch value, etc.), and converts these analog signals into 485 signals and transmits them to the data conversion module. Convert the received 485 signal to RS232 signal and transmit it to the ARM development board through the serial port line. After the ARM development board converts the range of the read signal, it displays the actual value of the acquisition factor, draws the dynamic curve, and writes the value into the database. , Writing into the database is convenient for future historical data query and generation of various reports. In the process of data transmission, the packaged data is transmitted to the designated place through the network (including broadband, CDMA/GPRS, Modem, etc.).

As shown in Figure 4, after the AMR development board is powered on, as the Win_CE system starts up, the software in the AMR development board will automatically load and run, first initialize, and then judge whether there is data in the serial port. If there is no data, enter the initialization cycle. Read data in the serial port, and then send the read data to the data processing module. The data processing module displays the converted actual monitoring value and writes it into the database to judge whether there is a network connection, and if so, transmits the data to the host computer; if not, displays and stores the data in the database, and the process ends.

Claims (6)

1. A data acquisition transmission control system, comprising a chassis, a power supply, a data acquisition module, an embedded processor, a display screen and an external device interface, characterized in that: the data acquisition module includes an analog signal acquisition module and a signal conversion module , the data pins of the analog signal acquisition module and the signal conversion module are connected in series, and their working voltage pins and ground pins are connected in parallel and then connected to the power supply; the signal conversion module is connected to the embedded processor; the voltage input terminal of the embedded processor and the ground terminal are connected to the power supply; the display screen is connected to the embedded processor, and the voltage input terminal and the ground terminal of the display screen are connected to the power supply. 2. The data acquisition and transmission control system according to claim 1, wherein said embedded processor comprises: The initialization module completes the initialization setting of each port, reads in the parameter values of the database, and makes the program start and run normally; The data receiving module receives the 485 signal data transmitted by the signal conversion module, and separates the data of the eight channels in the analog signal acquisition module; The data processing module converts the analog value of each channel into the real value of the instrument and writes it into the database; The data display module displays the data processed by the data processing module; Data transmission module, which packs data into various formats and transmits them to designated locations; The data statistics module realizes the output of reports, alarm query, historical data query, year-month-day average and cumulative value calculation. 3. The data collection and transmission control system according to claim 1, characterized in that: said embedded processor has a built-in real-time clock. 4. The data collection and transmission control system according to claim 1, characterized in that: said embedded processor has a built-in watchdog timer. 5. The data collection and transmission control system according to claim 1, characterized in that: said embedded processor has a built-in alarm device. 6. The data acquisition and transmission control system according to claim 1, wherein the external device interface includes a data interface, an analog interface, a network interface, a USB interface, and a communication interface.

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