CN110908321A - Data acquisition device for steam turbine set sensor - Google Patents
Data acquisition device for steam turbine set sensor Download PDFInfo
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- CN110908321A CN110908321A CN201911384123.9A CN201911384123A CN110908321A CN 110908321 A CN110908321 A CN 110908321A CN 201911384123 A CN201911384123 A CN 201911384123A CN 110908321 A CN110908321 A CN 110908321A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24215—Scada supervisory control and data acquisition
Abstract
A data acquisition device for a steam turbine set sensor belongs to the technical field of steam turbine operation data acquisition. The invention aims to solve the problem that the fast variable data and the slow variable data of different sensor data acquisition devices of the existing steam turbine set are rambled and cannot be compatibly used for running state analysis. The data acquisition processing board card is inserted in the case through the pull-out aid, and provides a back board bus for mutual communication through the case; each data acquisition processing board card provides 8 data acquisition channels; each data acquisition processing board card is provided with 8 groups of indicator lamps, and the back of each data acquisition processing board card is provided with 8 wiring terminals and is fixed on the case; the rear panel of the case is provided with two power input interfaces which are used for being connected with a power supply and providing a working power supply for the data acquisition and processing board card, and the power input interfaces are controlled to be on and off through a power switch arranged on the front panel; four net ports are also arranged on the rear panel of the case. The invention is used for integrally acquiring the fast variable and slow variable data of the sensor.
Description
Technical Field
The invention relates to a data acquisition device for a steam turbine set sensor, and belongs to the technical field of steam turbine operation data acquisition.
Background
At present, the equipment for collecting the data of the steam turbine sensor mainly has two types: one is a slow variable signal acquisition equipment DCS which can be used for acquiring data signals of slow variable sensors such as temperature, pressure, flow and water level; the other is a fast variable signal acquisition device TSI which can be used for acquiring data signals of fast variable sensors of shaft vibration, bearing vibration, acceleration, speed and the like of the steam turbine. Both types of acquisition equipment can enter an engineer station, but because equipment manufacturers are different, barriers exist between equipment data, and therefore no method is available for directly putting the data of the two types of equipment together for analysis, and the method causes obstacles to fault analysis and fault early warning of the whole turbine.
Disclosure of Invention
The invention provides a sensor data acquisition device for a steam turbine set, aiming at the problem that the fast variable data and the slow variable data of different sensor data acquisition devices of the existing steam turbine set are rambled and cannot be compatible for running state analysis.
The invention relates to a data acquisition device for a steam turbine set sensor, which comprises a case and a plurality of data acquisition and processing board cards,
the data acquisition and processing board card is inserted in the case through the pull-out aid, and provides a back board bus for mutual communication through the case;
the data acquisition processing board cards are distributed in two rows, and each data acquisition processing board card provides 8 data acquisition channels; each data acquisition processing board card is provided with 8 groups of indicator lamps which are respectively used for indicating the working state of the corresponding data acquisition channel; the back of each data acquisition processing board card is provided with 8 wiring terminals, and the wiring terminals are fixed on the chassis and used as input interfaces of data acquisition channels for receiving sensor signals;
the rear panel of the case is provided with two power input interfaces, wherein each power input interface comprises a main power input interface and a standby power input interface and is used for being connected with a power supply and providing a working power supply for the data acquisition and processing board card; four network ports are also arranged on the rear panel of the case and are respectively used as acquisition signal output network ports or DCS communication station data transmission network ports.
According to the steam turbine set sensor data acquisition device of the present invention,
and the pulling aid and the case panel are provided with fastening screws in a matching way for mutually matching to fix the data acquisition and processing board card.
According to the steam turbine set sensor data acquisition device of the present invention,
the sensor that data acquisition handled the binding post support of integrated circuit board includes:
the device comprises a vibration sensor, a key phase sensor, a rotating speed sensor, a displacement sensor, a pressure sensor, a host temperature sensor, a bearing temperature sensor, a flow sensor and a water level sensor.
According to the steam turbine set sensor data acquisition device of the present invention,
the data acquisition processing board card comprises a power supply unit, an analog circuit unit and a control storage unit,
the power supply unit is used for receiving a working power supply transmitted by the power input interface and supplying power to the analog circuit unit and the control storage unit; the analog circuit unit transmits the received sensor signal through an 8-path analog receiving circuit and performs data sampling through an analog-to-digital converter ADS 1278;
the control storage unit is used for performing control sampling on the analog-to-digital converter ADS1278, storing the sampled data and outputting the stored data through a network port on a rear panel of the chassis.
According to the steam turbine set sensor data acquisition device of the present invention,
the chassis is an aluminum alloy chassis, the width of the chassis is 19 inches, and the height of the chassis is 2U.
The invention has the beneficial effects that: the invention can be used for intelligent electric power plant construction, solves the problem that a fast variable signal and a slow variable signal of a collector of a steam turbine sensor are incompatible, encapsulates a data acquisition processing board card through a case, and arranges a data transmission interface on the case, has the characteristics of reliability, accuracy, safety and simplicity, can meet the on-site high-temperature, high-noise, dusty and other extreme working conditions of a power generation enterprise, and is simple and easy to use. After the device of the invention is used for integrally acquiring the fast variable and slow variable data of the sensor, the acquisition result can be integrally transmitted to the intelligent analysis database, and data support is provided for the intelligent system to realize data mining.
Drawings
FIG. 1 is a schematic diagram of a steam turbine set sensor data acquisition device according to the present invention;
FIG. 2 is a schematic block diagram of a data acquisition processing board;
FIG. 3 is a circuit architecture diagram of the data acquisition processing board card;
FIG. 4 is a layout diagram of an analog circuit cell;
FIG. 5 is a block diagram of an analog signal conversion and conditioning circuit of the analog circuit unit;
FIG. 6 is a circuit layout diagram of a control memory cell;
fig. 7 is a schematic diagram of a data processing circuit for controlling the memory cells.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
First embodiment, as shown in fig. 1, the present invention provides a data acquisition device for a steam turbine set sensor, which includes a casing 100 and a plurality of data acquisition processing boards 200,
the data acquisition processing board cards 200 are inserted into the case 100 through the pull-out aid, and provide a backplane bus for mutual communication and a power supply required by each data acquisition processing board card 200 through the case 100;
the plurality of data acquisition and processing board cards 200 are arranged in two rows, and each data acquisition and processing board card 200 provides 8 data acquisition channels; each data acquisition processing board card 200 is provided with 8 groups of indicator lamps which are respectively used for indicating the working state of the corresponding data acquisition channel; the back of each data acquisition processing board card 200 is provided with 8 wiring terminals 210, and the wiring terminals are fixed on the case 100 and used as input interfaces for receiving sensor signals of the data acquisition channels;
the rear panel of the case 100 is provided with two power input interfaces, including a main power input interface and a standby power input interface, for connecting with a power supply and providing a working power supply for the data acquisition processing board card 200, and the power input interfaces are controlled to be on and off by a power switch 110 arranged on the front panel; the rear panel of the case 100 is further provided with four network ports 120, which are respectively used as acquisition signal output network ports or data transmission network ports of the DCS communication station.
The embodiment can acquire data aiming at a plurality of measuring points of the steam turbine, can combine with an Ethernet bus interface of high-speed communication to form a data acquisition network, and can share and monitor the acquired data in the whole network.
The embodiment can adopt a dense point distribution mode for industrial equipment to complete the function of monitoring signal data in real time. The data acquisition processing board card 200 can convert the external physical quantity to be monitored into an electric signal; continuously extracting the characteristics of the obtained electric signals, converting the electric signals into required digital signals, acquiring related switching value signals, and performing a series of processing; the obtained digital signals can be transmitted to a monitoring workstation or an upper computer system through an industrial Ethernet through a data transmission bus. The monitoring workstation can record and store the acquired data, and perform quality monitoring through data processing and display. The whole data acquisition device takes multi-channel data acquisition as a core and is constructed into a distributed multi-domain data acquisition framework, and all acquired information is controlled and issued through a monitoring station or an upper computer system in a distributed Ethernet.
The pulling aid can facilitate the disassembly of the data acquisition processing board card 200. The power input interface is 220VAC, 50Hz power input interface, and 1 4A fuse is installed in it to 1 spare. The lower part of the power socket can be provided with a fastening screw which is connected with the casing of the case. When the power input interface is plugged with a 220V power line, the power switch 110 is pressed, the red lamp can display that the power is switched on, and the prompting device starts to work.
Each data acquisition processing integrated circuit board 200 can set up 2 groups 8 core binding post, provides signal input interface for 8 sensors. The data acquisition device can support 48 sensors at most. The data acquisition processing integrated circuit board is 8 passageway high accuracy data acquisition processing integrated circuit boards, and the main function includes: 8-channel 16-bit synchronous sampling, original data storage (reservation), network communication, serial communication (reservation) and the like.
Furthermore, the pulling aid and the panel of the case 100 are provided with fastening screws for fixing the data acquisition and processing board card 200 in a matching manner. The data acquisition processing board card 200 is connected with the case 100 through the pulling-assistant device, so that the installation and the disassembly are convenient and simple, and common field operators can easily learn and use the data acquisition processing board card.
As an example, the sensor supported by the connection terminal of the data acquisition and processing board 200 includes:
the device comprises a vibration sensor, a key phase sensor, a rotating speed sensor, a displacement sensor, a pressure sensor, a host temperature sensor, a bearing temperature sensor, a flow sensor and a water level sensor.
Wherein the vibration sensor is an eddy current sensor and ranges from-24V to 0V; the key phase sensor is an eddy current sensor, ranges from minus 24V to 0V and is a pulse signal; the rotating speed sensor is an eddy current sensor, ranges from minus 24V to 0V and is a pulse signal; the displacement sensor is an eddy current sensor and ranges from minus 24V to 0V; the pressure sensor is a piezoelectric sensor, and the range is 4 mA-20 mA; the host temperature sensor is a thermocouple sensor and ranges from 4mA to 20 mA; the bearing temperature sensor is a thermal resistance sensor, and the range is 100-330 ohms; the flow sensor is a current sensor, and the signal range is 4-20 mA; the water level sensor is a liquid level meter, and the range is 4 mA-20 mA. In this embodiment, the acquisition frequency of the data acquisition processing board 200 is adjustable in a large range, and the sampling precision can meet the construction requirements of an intelligent power plant.
Further, as shown in fig. 2 and fig. 3, the data acquisition and processing board 200 includes a power supply unit 210, an analog circuit unit 220 and a control storage unit 230,
the power supply unit 210 is configured to receive a working power source transmitted by the power input interface, and supply power to the analog circuit unit 220 and the control storage unit 230; the analog circuit unit 220 transmits the received sensor signal through an 8-path analog receiving circuit, and performs data sampling through an analog-to-digital converter ADS 1278;
the control storage unit 230 is configured to control sampling of the analog-to-digital converter ADS1278, and store the sampled data and output the stored data through a network port on a rear panel of the enclosure 100.
The data acquisition and processing board card 200 has an 8-channel high-precision data acquisition function, adopts a modular partition design form, and can meet the intelligent monitoring requirement of the steam turbine.
The power supply unit 210 can convert 220VAC alternating current into standard 12VDC through the ACDC module, and then supply power to the board circuit through the +/-5V/6W power supply DC/DC module, the 5V/10W power supply DC/DC module and the peripheral power supply of the chip. The specific description is as follows:
1) the +/-5V/10W power supply DC/DC module supplies power to the analog receiving circuit with 8 channels;
2) the 5V/10W power supply DC/DC module supplies power to the FPGA, the ARM, the ADC chip and the interface circuit chip thereof;
3) the chip peripheral power supply mainly comprises an FPGA, an ARM core power supply, a logic interface power supply, an interface chip power supply, an ADC reference voltage and the like.
Referring to fig. 4, the analog circuit unit 220 may adopt a modular design, and the 8-channel analog receiving circuit layout is divided into 1 unit, and one ADS1278 is used for sampling. The analog receiving circuit is composed of receiving matching, front amplifier, sampling matching and the like. Referring to fig. 5, the analog signal conversion and conditioning circuit mainly passes through a voltage attenuation circuit, a voltage offset circuit, a low-pass filter circuit and a voltage protection circuit for an electrical signal transmitted from the sensor, and then transmits an output voltage signal to the front-end signal acquisition chip through buffering processing. The analog quantity signal conversion conditioning circuit is the most front end part of the whole system, is related to the success or not of the whole system, and is an important part of the hardware design part. The function of the device is to perform attenuation filtering and the like on the acquired signals, so that the performance and reliability of data acquisition are improved. The analog receiving circuit is divided into three types, namely an analog voltage signal module, a current signal measuring module and a resistance signal measuring module.
Referring to fig. 6, the control storage unit 230 is an integrated backplane type design, and is composed of an ST semiconductor ARM chip (STM32F407VG), an FPGA chip (Xilinx Spartan-6), an SD card, a high-precision crystal oscillator, an AD9548, an RS232, a debug interface, and the like. The ARM chip realizes the functions of read-write operation, RS232 interface, microsecond timing and the like of the SD card. The FPGA chip mainly completes the control sampling of the ADC chip and communicates and interacts with the ARM. Designing the speed of an FSMC communication interface between the ARM chip and the FPGA chip: not less than 20 MBps; the storage speed of the SD card is as follows: not less than 6 MBps.
In fig. 7, the data processing part adopts a TMS320C6747 chip, is provided with 256Mbit sdram, a parameter memory EEPROM, and the program memory adopts SPI-FLASH 32 Mbit. The data exchange with the FPGA can be carried out, and ADC sampling data are obtained; can exchange data with ARM.
Still further, the enclosure 100 is an aluminum alloy enclosure having a width of 19 inches (84Te) and a height of 2U. U is a unit representing the external size of the server, and is an abbreviation of unit, and the thickness is 4.445cm as a basic unit, 1U is 4.445cm, and 2U is 2 times 1U and 8.89 cm. 1Te is 5.08 mm. The size of the case 100 is designed to be consistent with the loading model of the control cabinet of the original power plant.
The number of the data acquisition processing board cards 200 may be 4, and at most 6, the data acquisition processing board cards are horizontally arranged in 2 rows, and at most 3 data acquisition processing board cards are vertically arranged in each row, so that at most 48 channels are supported.
The surface of the aluminum alloy case can be treated by a hard anodic oxidation and sand blasting process, the wear resistance is strong, severe working condition conditions of a power plant can be met, the case power supply adopts two progressive fuses which are used one by one, rapid tripping and disconnection with DCS and TSI are guaranteed when a fault occurs, and safe operation of a steam turbine set is guaranteed.
The data acquisition device needs to be used in an industrial field, the industrial field environment is complex and severe, the device can work reliably and stably for a long time, signals are guaranteed not to be interfered by static electricity of induction electricity of the environment and surrounding electrical equipment, and therefore the aluminum alloy case is arranged to effectively protect the data acquisition processing board card 200.
In conclusion, the method and the device can eliminate barriers between the fast variable data and the slow variable data, realize the integrated acquisition of the fast variable data and the slow variable data, and provide data support for an intelligent system to realize data mining.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (5)
1. A data acquisition device for a steam turbine set sensor is characterized by comprising a case (100) and a plurality of data acquisition and processing board cards (200),
the data acquisition and processing board card (200) is inserted into the case (100) through the pull-out aid, and a backboard bus which is communicated with each other is provided through the case (100);
the data acquisition processing board cards (200) are arranged in two rows, and each data acquisition processing board card (200) provides 8 data acquisition channels; each data acquisition processing board card (200) is provided with 8 groups of indicator lamps which are respectively used for indicating the working state of the corresponding data acquisition channel; the back of each data acquisition processing board card (200) is provided with 8 wiring terminals (210), and the wiring terminals are fixed on the case (100) and used as input interfaces of data acquisition channels for receiving sensor signals;
the rear panel of the case (100) is provided with two power input interfaces, wherein each power input interface comprises a main power input interface and a standby power input interface and is used for being connected with a power supply and providing a working power supply for the data acquisition and processing board card (200), and the power input interfaces are controlled to be switched on and off through a power switch (110) arranged on the front panel; four network ports (120) are also arranged on the rear panel of the case (100) and are respectively used as acquisition signal output network ports or DCS communication station data transmission network ports.
2. The turboset sensor data acquisition device of claim 1,
and fastening screws are matched and arranged on the panel of the pulling aid and the chassis (100) and are used for mutually matching to fix the data acquisition and processing board card (200).
3. The turboset sensor data acquisition device of claim 1,
the sensor supported by the wiring terminal of the data acquisition and processing board card (200) comprises:
the device comprises a vibration sensor, a key phase sensor, a rotating speed sensor, a displacement sensor, a pressure sensor, a host temperature sensor, a bearing temperature sensor, a flow sensor and a water level sensor.
4. The turboset sensor data acquisition device of claim 1,
the data acquisition and processing board card (200) comprises a power supply unit (210), an analog circuit unit (220) and a control storage unit (230),
the power supply unit (210) is used for receiving a working power supply transmitted by the power input interface and supplying power to the analog circuit unit (220) and the control storage unit (230); the analog circuit unit (220) transmits the received sensor signals through an 8-path analog receiving circuit, and performs data sampling through an analog-to-digital converter ADS 1278;
the control storage unit (230) is used for performing control sampling on the analog-digital converter ADS1278, storing the sampled data and outputting the stored data through a network port on a rear panel of the case (100).
5. The steam turbine block sensor data acquisition device according to claim 1, wherein the casing (100) is an aluminum alloy casing having a width of 19 inches and a height of 2U.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911384123.9A CN110908321A (en) | 2019-12-28 | 2019-12-28 | Data acquisition device for steam turbine set sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911384123.9A CN110908321A (en) | 2019-12-28 | 2019-12-28 | Data acquisition device for steam turbine set sensor |
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| CN110908321A true CN110908321A (en) | 2020-03-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112269340A (en) * | 2020-10-30 | 2021-01-26 | 四川迈迪测控技术有限公司 | Multi-signal type high-precision acquisition card |
| CN114034497A (en) * | 2021-11-04 | 2022-02-11 | 上海自动化仪表有限公司 | Steam turbine health state data acquisition device |
| CN114253164A (en) * | 2020-09-23 | 2022-03-29 | 海鹰航空通用装备有限责任公司 | Compact dual-redundancy data acquisition unit |
-
2019
- 2019-12-28 CN CN201911384123.9A patent/CN110908321A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114253164A (en) * | 2020-09-23 | 2022-03-29 | 海鹰航空通用装备有限责任公司 | Compact dual-redundancy data acquisition unit |
| CN112269340A (en) * | 2020-10-30 | 2021-01-26 | 四川迈迪测控技术有限公司 | Multi-signal type high-precision acquisition card |
| CN114034497A (en) * | 2021-11-04 | 2022-02-11 | 上海自动化仪表有限公司 | Steam turbine health state data acquisition device |
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