CN211478936U

CN211478936U - General data acquisition control system

Info

Publication number: CN211478936U
Application number: CN201922326805.6U
Authority: CN
Inventors: 李智力; 赵长春; 郝春来; 张国庆; 田德龙
Original assignee: ZHONGNENG XINGKE (BEIJING) ENERGY-SAVING TECHNOLOGY CO LTD
Current assignee: ZHONGNENG XINGKE (BEIJING) ENERGY-SAVING TECHNOLOGY CO LTD
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-09-11
Anticipated expiration: 2029-12-23

Abstract

The invention provides a general data acquisition control system, which comprises a power supply, an analog/digital conversion module, an analog interface, a communication interface, a data memory, a programmable controller and a field control module, wherein software for self-adapting the range of a transmitter and a name comparison table for annotating and marking acquired data are arranged in the software of the programmable controller, so that the problem that a special data acquisition control system can only deal with one type of transmitter and cannot annotate and mark the acquired data is solved.

Description

General data acquisition control system

Technical Field

The utility model relates to a system for data acquisition, transmission, data processing among the automatic control, in particular to have multiple collection mode and can gather each field general data acquisition transmitting system.

Background

Data acquisition, also known as data acquisition, utilizes a device to acquire data from outside the system and input it to an interface within the system. Data acquisition techniques are widely used in various fields.

The collected data are various physical quantities such as temperature, water level, wind speed, pressure, etc. which have been converted into electrical signals, and may be analog quantities or digital quantities. With the development of communication in recent years, it has become a trend to collect data of each point/area through communication, and the greatest advantage of the data collection and analog quantity collection is the accuracy and the anti-interference capability of the data. The acquisition is generally a sampling mode, that is, the same point data is repeatedly acquired at certain time intervals (called sampling period). The acquired data are mostly instantaneous values, but also characteristic values within a certain period of time. Accurate data measurements are the basis for data acquisition.

The existing collector on the market is a special data collector at present, namely, the collected data is specified physical quantity, and when various physical quantities are collected or the measuring range of the transmitter cannot be determined, only field program compiling or data collector customizing can be adopted. Especially, when the properties of the physical quantities acquired by the existing acquisition devices are changed, the programs need to be rewritten and debugged. Thus, the time and labor are wasted, and the use cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a general data acquisition control system, concrete scheme is as follows:

a general data acquisition control system comprises a power supply, an analog/digital conversion module, an analog interface, a communication interface and a data memory, and is characterized by also comprising a programmable controller and a field control module, wherein:

the analog interface is used for receiving data sent by the transmitter;

the communication interface is used for transmitting the data collected in a centralized way;

the programmable controller can control the processing mode of the transmitter data according to the parameters set in the field control module by a user, so that the programmable controller is suitable for different transmitter data;

the field control module is used for man-machine interaction, and a user can set relevant parameters needing to be matched with the transmitter and display available parameters of various systems.

Further, the programmable controller includes software for controlling the operation of the system, and the architecture of the software includes:

the data calculation module is used for identifying and processing the transmitter data, the centralized acquisition data and the switching value data;

the protocol conversion module is used for interacting with the communication interface, converting the communication protocol and acquiring data collected in a centralized manner;

and the driving conversion module is used for acquiring the switching value and controlling the on-off of a sensor signal on the transmitter according to the state of the switching value.

Further, the transmitter parameters that the user can set in the field control module are a transmitter output lower limit and a transmitter output upper limit.

Furthermore, a name comparison table is arranged in the programmable controller and used for annotating the acquired data.

Furthermore, the programmable controller can carry out disconnection and overflow data diagnosis on the universal data acquisition control system according to the data value of the transmitter.

Furthermore, the general data acquisition control system performs the diagnosis of broken line and overflow data in the following way:

if the data value of the transmitter is less than or equal to the minimum value, the disconnection is judged;

if the data value of the transmitter is greater than or equal to the maximum value, judging that the transmitter overflows;

and if the data value of the transmitter is between the maximum value and the minimum value, judging that the data value is normal.

Further, the data collected by the system in each sampling period is stored in the data storage in a grouping manner, and each group of data comprises: transmitter data, diagnostic results, name look-up tables.

Further, each set of data may further include reserved data.

Further, in each group of data, the transmitter data is stored in a format of 1 Real type data, the size of the diagnosis result is 1Byte, the name comparison table is stored in a format of 7 Word type data, and the reserved data is stored in a format of 1Byte type data.

Further, the analog interface may include a plurality.

Further, the communication interface is a wired interface and/or a wireless interface.

By using the universal data acquisition system, the range of the transmitter can be flexibly set in the data acquisition process, and meanwhile, the acquired data is automatically annotated and labeled, so that the defects of the prior art are overcome.

Drawings

FIG. 1 is a block diagram of the hardware components of an embodiment of the present invention;

FIG. 2 is a system block diagram of one embodiment of the present invention;

fig. 3 is a data flow diagram of an embodiment of the present invention when collecting data;

FIG. 4 is a data storage format according to an embodiment of the present invention;

fig. 5 is a power connection diagram according to an embodiment of the present invention.

Detailed Description

With reference to fig. 1 and fig. 2, the modules in the solid line frame are components of the system of the present invention, and the modules in the dashed line frame are other modules necessary for the operation of the system, which are not included in the system.

The power supply P provides necessary power for system operation, can be 220V commercial power input, and can also use mobile power supplies such as storage batteries and the like as input. Both commercial power and portable power sources need to be used after being subjected to necessary rectification and voltage regulation operations in a power source P and then converted into voltages and currents required by each module of the system.

The programmable controller C includes software for processing data. The programmable controller C is able to translate the received data according to software code instructions and store it according to a specific format. In this embodiment, the software modules included in the programmable device mainly include: the system comprises a data calculation module CMP, a drive conversion module DR, a protocol conversion module T, a switching value acquisition module DI and a protocol acquisition module D.

In this embodiment, after the data acquisition is started, the user sets the upper limit Hi and the lower limit Li of the analog quantity through a touch screen in the system, i.e., a field control module HMI, and the set upper limit Hi and lower limit Li of the analog quantity are sent to a programmable controller C and converted into engineering quantity data by a data calculation module CMP.

The programmable controller C receives the signal TN and the switching value signal from the sensor, i.e., the transmitter, through the analog interface, while interacting with the plant data signal TC in the transmitter. IN this embodiment, the sensor signal TN is converted into a digitized analog input IN after analog-to-digital conversion (a/D), and the digitized analog input IN is sent to a data calculation module CMP, and is converted into engineering data by the data calculation module CMP; the equipment data TC carries out data acquisition through the MODBUS protocol acquisition module D, and sends the acquired data into the data calculation module CMP.

Meanwhile, the data calculation module CMP can also diagnose the disconnection and overflow of the self state according to the numerical value of the analog input IN and by combining the previously obtained analog upper limit Hi and analog lower limit Li. The method for performing the diagnosis comprises the following steps:

In addition, the programmable controller C can also receive centrally collected data through the communication interface COM. The centralized acquisition data transmitted through the communication interface COM comprises servo data with centralized acquisition conditions, such as thermometer data, water meter data, electric meter data, heat meter data, frequency converter data and the like. In this embodiment, the communication interface COM of the system includes a wireless communication interface and a wired communication interface, the wireless communication interface transmits data using a GPRS protocol, and the wired communication interface transmits data using an RS485 protocol. When the centralized collected DATA are transmitted through the communication interface COM, the protocol conversion module in the system software part can set the communication interface COM according to protocol parameters set in a touch screen, namely a field control module HMI, by a user, and the set communication interface DATA can directly transmit other DATA TD from the communication interface COM to the DATA storage module DATA.

IN each sampling period, after the analog input IN (including the switching value), the analog upper limit Hi, the analog lower limit Li and the device DATA TC are converted into engineering DATA IN the DATA calculation CMP module, the engineering DATA and other DATA TD are sent to the DATA storage unit DATA and stored IN groups. In the DATA storage unit DATA of the present embodiment, the DATA of each sampling period includes DATA, diagnosis, a look-up table, and a reserved four part, as shown in fig. 4.

According to the content shown IN fig. 4, the data portion of the present embodiment is 1 Real type data, i.e. the size is 1Byte, and the content is the engineering data of the analog input IN; the diagnosis part is 1Byte in size and stores the diagnosis result of the disconnection and overflow; the size of the comparison table is 7 words, and annotation marking data of the data part content is stored, wherein the annotation marking data comprises switching value, analog quantity upper limit Hi, analog quantity lower limit Li, equipment data TC and other data TD; the reserved portion has a size of 1Byte and is temporarily unused.

It should be understood by those skilled in the art that in each sampling period of the present embodiment, the system stores the engineering quantity data collected by each transmitter together with various servo information (such as the device data TC, the upper limit of analog quantity Hi, the lower limit of analog quantity Li, and other data TD, etc.) as a data set, and stores all the collected data on a storage medium such as a mobile hard disk, a memory card, etc. The storage medium can be taken out and copied to other computers after data acquisition is finished, and can also be output in real time through a wired or wireless interface in the acquisition process.

As shown in FIG. 5, in this embodiment, the wiring of the system is the same as that of a common collection box, and all transmitter input (0-10V or 0-20 mA) signal wires are directly connected with an access terminal according to a general connection method. For a 2-wire transmitter, the "+" terminal of the power supply is connected to the terminal "L +", and the "-" output of the transmitter is connected to the signal input "AI" terminal. For a 4-wire transmitter, the terminals of the power supply end "+" "-" are respectively connected to the terminals "L +" "M", and the terminals of the signal output "+" "-" are respectively connected to the terminals "AI" and "M". All communication temporarily only supports MODBUS communication protocol, and access is performed according to ' A + ' B- '.

After the signal line is connected, the power-on debugging can be carried out. The user inputs the range and name of the corresponding analog quantity on the touch screen, the communication end A plus and B is the data acquisition end of the device, and the corresponding station number, data position and length and transmission rate are set in the system. In this embodiment, the default rate is "9600, 8, E, 1". The device communication interface 485 plus is a transmission interface, and if wireless transmission is needed, wireless transmission devices such as a DTU (digital television unit) and the like can be accessed to the interface.

The general data acquisition control system provided by the present invention is described in detail above, and the principle and the implementation of the present invention are explained by applying specific examples, and the description of the above examples is only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, and the content of the present specification should not be understood as the limitation to the technical solution of the present invention.

Claims

1. A general data acquisition control system comprises a power supply, an analog/digital conversion module, an analog interface, a communication interface and a data memory, and is characterized by also comprising a programmable controller and a field control module, wherein:

the analog interface is used for receiving data sent by the transmitter;

the field control module is used for man-machine interaction, and a user can set relevant parameters needing to be matched with the transmitter and display available parameters of the system.

2. The universal data acquisition control system according to claim 1, wherein the transmitter parameters that a user can set in the field control module are a transmitter output lower limit and a transmitter output upper limit.

3. The universal data acquisition control system according to claim 2, wherein a name look-up table is provided in the programmable controller for annotating the acquired data.

4. The universal data acquisition control system according to claim 3, wherein said programmable controller is capable of performing a disconnection, overflow data diagnosis of said universal data acquisition control system based on transmitter data values.