CN219609458U

CN219609458U - Data acquisition and monitoring control equipment with main and standby switching function

Info

Publication number: CN219609458U
Application number: CN202320792602.XU
Authority: CN
Inventors: 王世超
Original assignee: Shanghai Yuandong Science And Technology Co ltd
Current assignee: Shanghai Yuandong Science And Technology Co ltd
Priority date: 2023-04-12
Filing date: 2023-04-12
Publication date: 2023-08-29
Anticipated expiration: 2033-04-12

Abstract

The utility model relates to a data acquisition and monitoring control device with a main-standby switching function, which comprises a main module (2) and a standby module (3) which are connected through a main-standby path switching relay (1), wherein the main-standby path switching relay (1) is connected with an external power supply, and any one of the main module (2) and the standby module (3) comprises: the data acquisition control terminal (4) is connected with the main/standby path switching relay (1); the controller (5) is respectively connected with the data acquisition control terminal (4) and an external instrument to be measured; a power supply switching relay (6) connected to the controller (5); and a battery (7) connected to the power supply switching relay (6) and the main/standby path switching relay (1), respectively. Compared with the prior art, the device realizes double backup of the power supply and the measuring device, has high redundancy and strong disaster resistance, is suitable for various meters to be measured, and has strong robustness.

Description

Data acquisition and monitoring control equipment with main and standby switching function

Technical Field

The utility model relates to the field of data acquisition, in particular to data acquisition and monitoring control equipment with a main-standby switching function.

Background

At the present time of rapid development of a data acquisition and monitoring control (Supervisory Control And Data Acquisition, SCADA) system, as a bottom data base of data analysis and integrated management, the data security, accuracy and real-time of hardware devices are particularly important. At present, most domestic products use an SCADA device alone to collect and transmit data, and do not do integral hardware redundancy processing, but because hardware devices have risks of failure damage caused by various nonresistible factors, when some devices of field hardware devices fail, the devices must be manually moved to the field to perform failure judgment, and communication is recovered through device replacement or maintenance, so that the safety and instantaneity of the data cannot be ensured, and therefore, a method needs to be found to avoid the data safety risk caused by hardware damage. There is a need to design a hardware-based redundancy scheme so that the security of data can be guaranteed.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide the data acquisition and monitoring control equipment with the main and standby switching functions and the power supply backup design.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides a data acquisition and monitoring control device with a main-standby switching function, which comprises a main module and a standby module which are connected through a main-standby switching relay, wherein the main-standby switching relay is connected with an external power supply, and any one of the main module and the standby module comprises:

the data acquisition control terminal is connected with the main/standby path switching relay;

the controller is respectively connected with the data acquisition control terminal and an external instrument to be measured;

the power supply switching relay is connected with the controller;

and the battery is respectively connected with the power supply switching relay and the main and standby path switching relay.

As a preferable solution, for any one of the primary module and the standby module, the method further includes:

and the controller is connected with the instrument to be tested through the isolating grating.

As a preferable technical scheme, the isolation grating comprises an analog quantity signal isolation grating and a 485 signal isolation grating.

As an optimal technical scheme, the external power supply is connected with the main and standby path switching relay through a transformer, and the output voltage of the transformer is 10-40V.

As an optimal technical scheme, aiming at the main and standby path switching relay, a normally open end is respectively connected with the power switching relay and the battery of the main module, and a normally closed end is respectively connected with the power switching relay and the battery of the standby module.

As an preferable technical scheme, for the power supply switching relay, a normal open end is connected with the main/standby path switching relay, and a normal closed end is connected with the battery.

As a preferable technical solution, the power supply device further includes a power switch for any one of the main module and the standby module.

As a preferable technical scheme, the controller is a PLC controller.

As a preferable technical scheme, the controller comprises an RS485 interface and a plurality of keys.

As a preferable technical scheme, the main module and the standby module are arranged and connected on the frame.

Compared with the prior art, the utility model has the following advantages:

(1) The power supply and the measuring equipment realize double backup, and have high redundancy and strong disaster resistance: through setting up main and backup way switching relay and the main module and the reserve module that connect respectively with it, if the module of current work detects the equipment trouble, then through changing the level of main and backup way switching relay control end, realize the switching of work module, the backup of measuring equipment has been realized, be provided with power switching relay in main module and the reserve module in addition, power switching relay is connected with battery and main and backup way switching relay respectively, the module is supplied power by external power source during normal operating, detect voltage abnormality when data acquisition control terminal, then through changing the level of power switching relay's control end, realize the switching of power/battery power supply, realize the backup of power, this equipment has the redundancy height, the advantage that disaster resistance is strong.

(2) The method is suitable for various meters to be tested, and has strong robustness: the safety of signal measurement is guaranteed through the arrangement of the isolation grating, the equipment is prevented from being damaged due to high voltage at the instrument end, the isolation grating comprises an analog quantity signal isolation grating and a 485 signal isolation grating, and the device is suitable for various measuring instruments.

Drawings

Fig. 1 is a schematic diagram of the structure of a data acquisition and monitoring control apparatus in embodiment 1;

FIG. 2 is a schematic diagram of a data acquisition and monitoring control apparatus in embodiment 1;

fig. 3 is a wiring diagram of a main-standby switching relay;

figure 4 is a wiring diagram of the power switching relay in example 2,

the device comprises a main circuit switching relay 1, a standby circuit switching relay 2, a main module, a standby module 3, a data acquisition control terminal 4, a controller 5, a power switching relay 6, a battery 7, a battery 8, an isolation grid 801, an analog quantity signal isolation grid 802, a 485 signal isolation grid 9, a transformer 10 and a power switch.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

Example 1

As shown in fig. 1-3, the embodiment provides a data acquisition and monitoring control device with a main-standby switching function, the currently used device acquires the field meter through the PLC, then the acquisition terminal acquires the PLC and uploads the PLC to the SCADA platform, and the device is a set of mutually independent device, and the acquisition terminal and the PLC cannot judge and eliminate faults.

Firstly, a fault source needs to be judged, a PLC feeds back whether the collection is successful or not when the pair of instruments is collected, the value can be judged, the judgment result is stored and uploaded, and when the collection terminal is communicated with the PLC, the collection terminal can monitor the communication result and judge whether the data collected by the PLC is correctly obtained or not. The server side is provided with an intelligent acquisition control platform, and the platform and the intelligent acquisition terminal can communicate once at intervals for determining that data uploaded by the acquisition terminal can be correctly received.

Second, after determining the source of the fault, the fault location needs to be automatically replaced with a new device, at which point a spare hardware portion is used. The same set of hardware as the original equipment is used, and the acquisition lines are independent and do not interfere with each other. And the intelligent acquisition terminals in the equipment can mutually monitor whether the main and standby lines are in normal operation. After the equipment fault signal is obtained, the intelligent acquisition terminal can automatically switch the hardware, and the standby route is used for acquisition and communication, so that the hardware part uses the identical configuration, the intelligent acquisition terminal can be rapidly switched under the unattended condition, and the data integrity is ensured. If the power failure exists, the equipment can also ensure that the data within a certain time is normal through the storage battery.

Finally, the fault information of the equipment is uploaded to a maintenance personnel background by the equipment. The maintenance group may know the fault information at a first time and determine the source of the fault. After the fault reasons are known, personnel can be rapidly arranged to carry out positive maintenance on the fault points, and the functions of the equipment are recovered.

Therefore, the embodiment adds a set of hardware equipment with the same configuration as the original hardware on the basis of the hardware equipment of the original SCADA system, and the hardware equipment comprises device circuits which all use the same configuration. The hardware-used and-standby equipment is shown in fig. 2, the operation state of the isolation grating is detected when the PLC operates, the operation state of the PLC and the operation state of the isolation grating are transmitted to the multifunctional acquisition control terminal, the terminal judges the operation condition of the equipment, and the power supply of the operation equipment is switched by the signal output control relay so as to control the output of the main loop or the standby loop.

The device is powered on to the relay coil, a switching signal is output to the intelligent acquisition terminal, whether the external power supply of the device works normally or not is judged, and the intelligent acquisition control terminal transmits the external power supply state data to the SCADA background.

The storage battery is connected to the storage battery power supply, the storage battery is in a non-use state at ordinary times, the use condition of the storage battery is controlled through the relay, the storage battery supplies power to the acquisition control terminal under the condition that the direct current 24V power supply of the equipment fails due to the interruption of external power supply or the failure of the switching power supply, and the acquisition terminal controls the use state of the whole equipment, so that the continuous and stable operation of the system is ensured. (the relay wiring is shown in figure 3. The 24V power supply output by the switch power supply is connected to the relay coil, the normal power supply is connected to the normally open contact of the equipment, the battery power supply is connected to the normally closed electric shock of the relay, when the power supply output is normal, the normally open contact is closed, the equipment uses the switch power supply to supply power, when the output is abnormal, the normally closed contact is closed, and the battery is used for supplying power.)

And programming and developing the PLC, and recording and uploading the abnormal condition by the PLC when the abnormal value is acquired or communication with the field meter fails. The output signal of the PLC also gives a switch signal to the intelligent acquisition terminal, and the intelligent acquisition terminal switches the standby equipment line to acquire data after receiving the signal.

The control main platform is arranged, the running condition of the field device can be monitored remotely through the server, if the abnormality of the device is found, and the device is not automatically switched, the corresponding link switching can be finished through a remote issuing instruction, whether the collected data are normal or not is tested, and finally the safety and the reliability of the data are ensured.

The device provided in this embodiment includes a main module 2 and a standby module 3 connected through a main-standby path switching relay 1 and disposed on a rack, the main-standby path switching relay 1 is connected with an external power source, the external power source is connected with the main-standby path switching relay 1 through a transformer 9, the output voltage of the transformer 9 is 24V, and for any one of the main module 2 and the standby module 3, the device includes:

the data acquisition control terminal 4 is connected with the main/standby path switching relay 1;

the controller 5 is respectively connected with the data acquisition control terminal 4 and an external instrument to be measured;

a power supply switching relay 6 connected to the controller 5;

the battery 7 is respectively connected with the power supply switching relay 6 and the main/standby path switching relay 1;

the controller 5 is connected with the instrument to be tested through the isolation grating 8, and the isolation grating 8 comprises an analog quantity signal isolation grating 801 and a 485 signal isolation grating 802;

a power switch 10.

As shown in fig. 2, for the main/standby path switching relay 1, the normally open end is connected with the power switching relay and the battery of the main module 2, and the normally closed end is connected with the power switching relay and the battery of the standby module 3.

For the power supply switching relay 6, the normal open end is connected with the main/standby path switching relay 1, and the normal closed end is connected with the battery 7.

In this embodiment, the controller 5 is a PLC controller, including an RS485 interface and a plurality of keys. The specific model of the controller 5 is MicroLogix-1400, the model of the main/standby path switching relay 1 and the model of the power switching relay 6 are RCM-KITS-24VDC-4CO, the model of the analog signal isolation grid 801 is CZ8536, and the model of the 485 signal isolation grid 802 is CZ8594 or CZ8592. The model of the data acquisition control terminal 4 is DLG-MBS03 multifunctional data acquisition control terminal.

The working principle of the equipment is as follows: and one end of the main/standby path switching relay 1 is connected with an external power supply and is converted into 24V output through a transformer 9, under normal conditions, the normal end of the main/standby path switching relay 1 is communicated with the power switching relay of the main module 2, the main module is used for data acquisition and monitoring control, and if the data acquisition control terminal of the main module detects that the isolation grid 8 or the acquisition controller 5 is abnormal, the level of the main/standby path switching relay 2 is changed, so that the main/standby path switching relay is switched to the standby module 3, and the main/standby switching is realized. In the main module 2 or the standby module 3, the normal end of the power supply switching relay 6 is connected with the main and standby path switching relay 1, the normal end is connected with the battery 7, when the voltage is normal, the external power supply after voltage transformation is used for directly supplying power, if the voltage is abnormal, the level of the power supply switching relay 6 is changed, and the power supply is switched to the battery 7 for supplying power, so that the power supply switching is realized. The process of collecting the data of the instrument to be measured comprises the following steps: the data acquisition control terminal 4 receives a measurement request from a timing task or the outside, sends a measurement instruction to the controller 5, sends a signal to an external instrument to be measured through the isolation grating 8, collects measured information, and transmits the information back to the data acquisition control terminal 4 after arrangement, and the terminal outputs to the cloud or transmits to external equipment to realize data acquisition and monitoring control.

Example 2

As shown in fig. 4, compared with embodiment 1, this embodiment eliminates the main module and the standby module but uses a single power switching relay to implement the power switching function, and the normal open end of the power switching relay is connected with the main and standby relay, and the normal closed end is connected with the batteries of the main module and the standby module, thereby saving the cost.

While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. The data acquisition and monitoring control device with the main-standby switching function is characterized by comprising a main module (2) and a standby module (3) which are connected through a main-standby path switching relay (1), wherein the main-standby path switching relay (1) is connected with an external power supply, and any one of the main module (2) and the standby module (3) comprises:

the data acquisition control terminal (4) is connected with the main/standby path switching relay (1);

the controller (5) is respectively connected with the data acquisition control terminal (4) and an external instrument to be measured;

a power supply switching relay (6) connected to the controller (5);

and a battery (7) connected to the power supply switching relay (6) and the main/standby path switching relay (1), respectively.

2. A data acquisition and monitoring control device with master-slave switching function according to claim 1, characterized in that it further comprises, for any one of said master module (2) and said slave module (3):

and the controller (5) is connected with the instrument to be tested through the isolation grid (8).

3. A data acquisition and monitoring control device with active-standby switching function according to claim 2, characterized in that the isolation gate (8) comprises an analog signal isolation gate (801) and a 485 signal isolation gate (802).

4. The data acquisition and monitoring control device with the main-standby switching function according to claim 1, wherein the external power supply is connected with the main-standby switching relay (1) through a transformer (9), and the output voltage of the transformer (9) is 10-40V.

5. The data acquisition and monitoring control device with the main-standby switching function according to claim 1, wherein for the main-standby switching relay (1), a normally open end is respectively connected with a power switching relay and a battery of the main module (2), and a normally closed end is respectively connected with a power switching relay and a battery of the standby module (3).

6. A data acquisition and monitoring control device with active-standby switching function according to claim 1, characterized in that for said power switching relay (6), the normally open end is connected to said active-standby switching relay (1) and the normally closed end is connected to said battery (7).

7. A data acquisition and monitoring control device with master-slave switching function according to claim 1, characterized in that it further comprises a power switch (10) for either of said master module (2) and said slave module (3).

8. The data acquisition and monitoring control device with the active-standby switching function according to claim 1, wherein the controller (5) is a PLC controller.

9. The data acquisition and monitoring control device with active-standby switching function according to claim 1, wherein the controller (5) comprises an RS485 interface and a plurality of keys.

10. The data acquisition and monitoring control device with the master-slave switching function according to claim 1, wherein the master module (2) and the slave module (3) are both arranged and connected on the rack.