CN101707402A - Power system on-off amount remote monitoring module and monitoring method thereof - Google Patents
Power system on-off amount remote monitoring module and monitoring method thereof Download PDFInfo
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Abstract
The invention discloses a power system on-off amount remote monitoring module and a monitoring method thereof. The power system on-off amount remote monitoring module mainly comprises a microprocessor, an on-off amount input circuit, an on-off amount output circuit, a key signal collecting circuit, a communication interface circuit, and the like. An external power supply module provides a working power supply for a system. The power system on-off amount remote monitoring module is provided with a UART interface for realizing the uploading function of data, receives a command of a supervisory computer by a communication interface, executes and reads an on-off amount input state and controls output. The external logic is unified into a whole, setting values of a communication address and a Baud rate can be unified with other devices, such as a matched multifunctional electric quantity instrument, and the like, and the modularization is strong; the flexibility is high, and the module is in a clamping groove type and can be matched with a multifunctional meter; the expansibility is high, and multiple paths of on-off amount can be expanded according to the practical requirement; the cost is saved, the cost-performance ratio is high, and a switch power supply in the module can be externally arranged; and the module has succinct and attractive appearance, small size and convenient installation.
Description
Technical field
The present invention relates to field of power system control, relate in particular to the method for supervising of power system on-off amount remote monitoring module and power system on-off amount remote monitoring module.
Background technology
Power industry is the lifeblood of national economy, is important pillar industry.The design on/off control system carries out centralized control to a plurality of switches, will be a very significant thing on safety and practicality.In recent years, along with the fast development of new sensor technology, signal processing technology, the communication technology and computer technology, remote control technology has obtained develop rapidly.Has plurality of advantages owing to adopt the RS485 twisted-pair feeder to transmit remote signalling information aspect transmission range and the reliability, simultaneously, the backstage microcomputer has remarkable advantages under the windows environment in data base administration, long distance control system based on RS485 interface and Modbus agreement has obtained application at power department, simultaneously, LV Distribution Monitoring System is gathered the electric parameter information of each power distribution cabinet in the power distribution room, circuit-breaker status information, realization is to the remote control of each power distribution cabinet, remote measurement, remote regulating, remote signalling, the switching value monitoring unit that is used in electric power system can roughly be divided into 8 the tunnel according to the way of gathering, 16 the tunnel, 32 the tunnel, wherein have the measurement of analog quantity mostly, for the application scenario that only needs to detect the variable connector amount, its cost and volume just are subjected to serious restriction like this.
Summary of the invention
Technical problem to be solved by this invention is, a kind of power system on-off amount remote monitoring module and method for supervising are provided, to realize receiving the order of host computer by communication interface, carry out the action of read switch amount input state and coil output state, and according to the disconnection and the closed action of command execution output winding.Realize functions such as collection, communication, setting, control.
For solving the problems of the technologies described above, technical scheme of the present invention is that the power system on-off amount remote monitoring module comprises microprocessor, it is characterized in that;
The switching value input circuit is used for the value to microprocessor collection input switch amount;
The push button signalling Acquisition Circuit; Be used for communication baud rate and module's address being set by toggle switch;
The communication interface circuit; Employing is imported data with switching value and is uploaded to host computer by microprocessor based on the RS-485 communication mode of Modbus agreement, from host computer receiving key amount data, and and host computer keep real time communication;
The switching value output circuit, microprocessor receives the switching value output control information that host computer sends by the communication interface circuit, and the operating state of control relay;
Described microprocessor is used for that initialization module, response timer interrupt, storage is provided with data.
The power system on-off amount remote monitoring module, described monitoring module is connected with the external power supply module.
The power system on-off amount remote monitoring module, described switching value input circuit is by shaping, delay circuit and the optical coupling isolation circuit of serial connection are formed successively.
Power system on-off amount remote monitoring module, described microprocessor are that singlechip CPU process chip model is AT89C52, and communication interface processing of circuit chip model is RSM485CT.
A kind of method for supervising of power system on-off amount remote monitoring module may further comprise the steps;
A) initialization step is initialised to a known state with single-chip microcomputer, and makes serial ports be in accepting state, and is ready for entering duty cycle;
B) Timing Processing step, the overtime detection subprogram of the communication of setting up serial ports all adopts interrupt mode to each Data Receiving, and whether judgment data receives and finishes;
C) serial ports interrupt step; The slave serial communication adopts interrupt mode to receive the data that main frame sends and receives.Microcontroller serial port at first is in the reception data mode, just can produce interruption when serial ports receives 6 bit address data, judges to be this slave addresses in interrupt routine, if the data that receive the back then are set, otherwise with regard to forgo data, then, single-chip microcomputer receives the data of back with interrupt mode;
D) switching value output controlled step; The output of switching value is to drive the triode break-make by CPU to come control relay, and after the CPU gating enabled, the switching value dateout to triode, was finished the control to relay by the CPU output port.
The method for supervising of power system on-off amount remote monitoring module, described initialization step may further comprise the steps;
Initialization single-chip microcomputer internal register, timer T0 and serial ports and open interruption;
The inner house dog register of initialization single-chip microcomputer;
The microcontroller serial port baud rate is provided with, and is accepting state with serial port setting;
Read the address of devices of single-chip microcomputer in the Modbus bus.
The method for supervising of power system on-off amount remote monitoring module, in the described Timing Processing step, the real-time read switch amount of single-chip microcomputer state, and storing result data into single-chip microcomputer internal RAM designating unit, the status data with nearest switching value when receiving the order that host computer transmits sends to host computer.
The method for supervising of power system on-off amount remote monitoring module, in the described serial ports interrupt step, the host computer storage that single-chip microcomputer receives serial ports can be handled the latest data that receives after communication is overtime in the designating unit of internal RAM.Processing to data mainly comprises: to the identification and the verification of command word, and command word replied.
Power system on-off amount remote monitoring module and method for supervising thereof, owing to adopt said structure and method for supervising, disposal ability by the AT89C52 single-chip microcomputer realizes minimum double switch amount input (remote signalling), one tunnel passive normally opened contact output (remote control), and multichannel can extend to 32 the tunnel and open into amount, the switching value remote monitoring module of 16 road amounts of leaving, this module has the function that the UART interface is realized data upload, receive the order of host computer by communication interface, carry out the action of read switch amount input state and coil output state, and, have the following advantages according to the disconnection and the closed action of command execution output winding; 1, external unified logic integral body: the set point of address, baud rate can be unified with supporting other devices such as multi-functional electric weight instrument, and the modulus voltinism is strong; 2, flexibility is strong: this module is a card slot type, if device needs this switching value performance, then can with the supporting use of multifunctional meter; 3, autgmentability is strong: can need how many way switch amounts according to the actual needs expansion.4, save cost, cost performance height: Switching Power Supply can be external in the module, if need 10 switching value remote monitoring modules of configuration on a switch cubicle, then only needs one road power supply supply to satisfy; 5, this module profile is succinctly attractive in appearance, volume is little, easy for installation.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments;
Fig. 1 is a power system on-off amount remote monitoring module block diagram of the present invention;
Fig. 2 is a switching value input circuit principle schematic shown in Figure 1;
Fig. 3 is a push button signalling Acquisition Circuit principle schematic shown in Figure 1;
Fig. 4 is a switching value output circuit principle schematic shown in Figure 1;
Fig. 5 is a communication interface circuit theory schematic diagram shown in Figure 1;
Fig. 6 is a microcontroller circuit principle schematic shown in Figure 1;
Fig. 7 is the method for supervising main program flow chart of power system on-off amount remote monitoring module of the present invention;
Fig. 8 is the initialization subroutine flow chart;
Fig. 9 is the Timing Processing subroutine flow chart;
Figure 10 is a serial ports interruption subroutine flow chart;
In Fig. 1,1, microprocessor; 2, communication interface circuit; 3, host computer; 4, switching value input circuit; 5, switching value output circuit; 6, push button signalling Acquisition Circuit; 7, external power supply module.
Embodiment
As Fig. 1～shown in Figure 6, the power system on-off amount remote monitoring module mainly comprises microprocessor 1, CPU process chip model is that AT89C52, switching value input circuit 4, switching value output circuit 5, push button signalling Acquisition Circuit 6, communication interface circuit 2 etc. are partly formed, and external power supply module 7 provides stable 5V and 24V working power for whole system.AT89C52 adopts the 12MHz crystal oscillator frequency, and working power is for isolating back 5V.Read by eight hardware toggle switchs with the P1 mouth of single-chip microcomputer communications parameter is set, adopt single-chip microcomputer P1.0～P1.5 to read address setting, P1.6 and P1.7 read the setting of baud rate, send data to host computer 3 by RS-485 communication interface circuit 2.Must disturb system in order to reduce external switch, at first isolate with photoelectrical coupler U2 at input, the P2 mouth by single-chip microcomputer reads different inputs respectively again, and the switching value that reads can be stored in the memory of single-chip microcomputer particular address.Single-chip microcomputer switch amount data are handled, and by serial ports data are sent to host computer 3, export for switching value, single-chip microcomputer obtains the switching value dateout that host computer 3 transmits by serial ports, and data are handled, finished the switch control to relay K, the raising system gets reliability.
Referring to Fig. 2, Fig. 6, for eliminating the shake of shift knob, shaping, delay circuit have been added for 4 li at the switching value input circuit, No. 2 photoelectrical coupler U2, the 0-30V input, be input to P2.5 and the P2.6 pin of single chip computer AT 89C52 then, single-chip microcomputer carries out information processing after receiving the information of input.
Referring to Fig. 3, Fig. 6, toggle switch S1 is provided with communication baud rate and module's address, and the end ground connection of 8 toggle switch S1 is read the state of toggle switch S1, switch closure output low level by single-chip microcomputer P1.0～P1.7.Switch disconnects the output high level.Six control informations as module's address of P1.0～P1.5, P1.6～P1.7 is as the control information of communication baud rate.The setting of communications parameter can be realized by toggle switch S1, the conforming function of communications parameter and power instrument can be realized.
Referring to Fig. 4, single-chip microcomputer obtains the switching value output control information that host computer sends from serial ports, and the operating state of control relay K, its operation principle is: single-chip microcomputer outputs to the P3.7 mouth with switching value, output is connected to the base stage of triode Q2 then, by the saturated of triode Q2 and the break-make of ending the driving relay K.
Referring to Fig. 5, Fig. 6, the main effect of RS-485 communication interface circuit is switching value to be imported data upload give host computer, from host computer receiving key amount data, and and host computer maintenance real time communication.Microcontroller serial port signal TXD is connected with P3.1 with the P3.0 of single chip computer AT 89C52 with RXD, by transmitting and receiving data, can finish that RS-485 bus standard signal is sent in the Modbus network.Be connected with host computer by A, B interface.
RSM485CT is the communication interface circuit chip, and there are integrated circuits such as optocoupler and emission reception inside, has guaranteed the reliability and the accuracy of communication, thereby has effectively guaranteed the stability of device.
As shown in Figure 7, Fig. 7 is the method for supervising main program flow chart of power system on-off amount remote monitoring module of the present invention; The method for supervising main program flow mainly is responsible for receiving data and the order from the host computer serial ports, the state information of read switch amount, and switching value output control, and be responsible for giving host computer with data upload; System adopts the RS-485 communication mode based on the Modbus agreement. adopt " MS master-slave " technology, promptly there is an equipment (main equipment) initialization to transmit (inquiry). other equipment (slave unit) are made a response according to the data that main equipment provides. and this Single Chip Microcomputer (SCM) system is carried out communication as slave (slave unit), transfer of data adopts the RTU pattern. when carrying out communication, main frame at first sends a request according to Modbus protocol frame format tissue, information on the then continuous testbus of slave. after the request that slave receives main frame to transmit it to be handled. main frame just is in wait state after sending request, message in the continuous testbus, after receiving message, to its master-slave communication of finishing dealing with.
Referring to Fig. 8, Fig. 8 is the initialization subroutine flow chart, step 20 is for beginning action, behind the system power-on reset, single-chip microcomputer can call initialization subroutine immediately, in step 21, initialization single-chip microcomputer internal register, timer T0 and serial ports and open interruption, the inner house dog register of initialization single-chip microcomputer.Initialization to timer T0 is exactly a working method of setting timer T0 by the control register of write timing device T0, and the serial ports initialization also is by writing the serial ports related register working method of setting up serial ports.Step 22 microcontroller serial port baud rate is provided with, and is accepting state with serial port setting.Read the address of devices of single-chip microcomputer in the Modbus bus in step 23, step 24 initialization subroutine finishes.
Referring to Fig. 9, Fig. 9 is the Timing Processing subroutine flow chart.In order to improve systematically real-time, each Data Receiving is all adopted interrupt mode.For judgment data receives whether finish the overtime detection subprogram of the communication of just need setting up serial ports.The state of input switch amount is a change at random, single-chip microcomputer will guarantee real-time read switch amount state, and store result data into single-chip microcomputer internal RAM designating unit, in order to can be when receiving the order that host computer transmits the status data of nearest switching value being sent to host computer.The communication data of host computer and single-chip microcomputer is several bytes, in order to improve systematically real-time, each Data Receiving is all adopted interrupt mode.For judgment data receives whether finish the overtime detection subprogram of the communication of just need setting up serial ports.The host computer storage that single-chip microcomputer receives serial ports can be handled the latest data that receives after communication is overtime in the designating unit of internal RAM.Processing to data mainly comprises: to the identification and the verification of command word, and command word replied.
Referring to Figure 10, Figure 10 is a serial ports interruption subroutine flow chart.The slave serial communication adopts interrupt mode to receive the data that main frame sends and receives.Microcontroller serial port at first is in the reception data mode, just can produce interruption when serial ports receives 6 bit address data, judges to be this slave addresses in interrupt routine, if, the data that receive the back then are set, otherwise with regard to forgo data.Then, single-chip microcomputer receives the data of back with interrupt mode.
Step 40 keeps the scene intact in step 41 for the serial ports interruption subroutine begins.Step 42 judges whether register-bit is 0, if, then enter step 43 data pointer and add 1, after the execution of step 43, enter and enter step 48 recovery scene after step 45 is stored data.If it is fixed to judge whether, then execution in step 44 judges whether the address meets, if, then entering the zero clearing of step 46 register-bit, execution of step 46 enters and enters step 48 after step 47 is provided with data pointer.If it is fixed to judge whether, then enter step 48.Step 49 interrupts returning.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (8)
1. the power system on-off amount remote monitoring module comprises microprocessor (1), it is characterized in that;
Switching value input circuit (4) is used for the value to microprocessor (1) collection input switch amount;
Push button signalling Acquisition Circuit (6); Be used for communication baud rate and module's address being set by toggle switch;
Communication interface circuit (2); Employing is imported data with switching value and is uploaded to host computer (3) by microprocessor based on the RS-485 communication mode of Modbus agreement, from host computer (3) receiving key amount data, and and host computer (3) keep real time communication;
Switching value output circuit (5), microprocessor (1) receives the switching value output control information that host computer (7) sends by communication interface circuit (2), and the operating state of control relay;
Described microprocessor (1) is used for that initialization module, response timer interrupt, storage is provided with data.
2. power system on-off amount remote monitoring module according to claim 1 is characterized in that, described monitoring module is connected with external power supply module (7).
3. power system on-off amount remote monitoring module according to claim 1 is characterized in that, described switching value input circuit (4) is by shaping, delay circuit and the optical coupling isolation circuit of serial connection are formed successively.
4. power system on-off amount remote monitoring module according to claim 1 is characterized in that, described microprocessor (1) is AT89C52 for singlechip CPU process chip model, and communication interface processing of circuit chip model is RSM485CT.
5. the method for supervising according to the described power system on-off amount remote monitoring module of claim 1～4 is characterized in that, may further comprise the steps;
A) initialization step is initialised to a known state with single-chip microcomputer, and makes serial ports be in accepting state, and is ready for entering duty cycle;
B) Timing Processing step, the overtime detection subprogram of the communication of setting up serial ports all adopts interrupt mode to each Data Receiving, and whether judgment data receives and finishes;
C) serial ports interrupt step; The slave serial communication adopts interrupt mode to receive the data that main frame sends and receives.Microcontroller serial port at first is in the reception data mode, just can produce interruption when serial ports receives 6 bit address data, judges to be this slave addresses in interrupt routine, if the data that receive the back then are set, otherwise with regard to forgo data, then, single-chip microcomputer receives the data of back with interrupt mode;
D) switching value output controlled step; The output of switching value is to drive the triode break-make by CPU to come control relay, and after the CPU gating enabled, the switching value dateout to triode, was finished the control to relay by the CPU output port.
6. the method for supervising of power system on-off amount remote monitoring module according to claim 5 is characterized in that, described initialization step may further comprise the steps;
Initialization single-chip microcomputer internal register, timer T0 and serial ports and open interruption;
The inner house dog register of initialization single-chip microcomputer;
The microcontroller serial port baud rate is provided with, and is accepting state with serial port setting;
Read the address of devices of single-chip microcomputer in the Modbus bus.
7. the method for supervising of power system on-off amount remote monitoring module according to claim 5, it is characterized in that, in the described Timing Processing step, the real-time read switch amount of single-chip microcomputer state, and storing result data into single-chip microcomputer internal RAM designating unit, the status data with nearest switching value when receiving the order that host computer transmits sends to host computer.
8. the method for supervising of power system on-off amount remote monitoring module according to claim 5, it is characterized in that, in the described serial ports interrupt step, the host computer storage that single-chip microcomputer receives serial ports is in the designating unit of internal RAM, can handle after communication is overtime to the latest data that receives. the processing to data mainly comprises: to the identification and the verification of command word, and command word replied.
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Cited By (11)
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| CN102446410A (en) * | 2012-01-05 | 2012-05-09 | 广西电网公司电力科学研究院 | Remote control telecommand box for on-site test of power load management terminal and control method |
| CN102494806A (en) * | 2011-12-21 | 2012-06-13 | 中国计量学院 | Long-distance automatic verification system of digital display type temperature indicating instrument |
| CN102809936A (en) * | 2012-08-08 | 2012-12-05 | 四川爱特尔科技有限公司 | Multi-switching-value combinational logic state implementation method |
| CN104020714B (en) * | 2014-06-19 | 2016-11-23 | 广东润星科技股份有限公司 | The output of a kind of quickly distribution and input module and operational diagnostics method thereof |
| CN106443294A (en) * | 2016-08-15 | 2017-02-22 | 国家电网公司 | Verification method and device for input loops of secondary circuit of transformer substation protector |
| CN107465332A (en) * | 2017-05-23 | 2017-12-12 | 深圳市鸿哲智能系统工程有限公司 | A kind of 8 rail road power-supply controller of electric |
| CN108845253A (en) * | 2018-10-09 | 2018-11-20 | 华北电力大学（保定） | A kind of switch quantity acquisition circuit |
| CN111045340A (en) * | 2019-12-03 | 2020-04-21 | 北京计算机技术及应用研究所 | Network intelligent power distribution equipment |
| CN111198522A (en) * | 2019-11-28 | 2020-05-26 | 广州民航职业技术学院 | Interface circuit including multiple output types and control method thereof |
| CN113376535A (en) * | 2021-06-18 | 2021-09-10 | 深圳市康奈特电子有限公司 | Automatic testing system of new energy battery |
| CN114325359A (en) * | 2020-09-28 | 2022-04-12 | 深圳市德安通科技有限公司 | Wireless multi-way switch dynamic monitoring method |
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| CN102494806A (en) * | 2011-12-21 | 2012-06-13 | 中国计量学院 | Long-distance automatic verification system of digital display type temperature indicating instrument |
| CN102446410B (en) * | 2012-01-05 | 2013-05-15 | 广西电网公司电力科学研究院 | Remote control telecommand box for on-site test of power load management terminal and control method |
| CN102446410A (en) * | 2012-01-05 | 2012-05-09 | 广西电网公司电力科学研究院 | Remote control telecommand box for on-site test of power load management terminal and control method |
| CN102809936A (en) * | 2012-08-08 | 2012-12-05 | 四川爱特尔科技有限公司 | Multi-switching-value combinational logic state implementation method |
| CN102809936B (en) * | 2012-08-08 | 2015-05-06 | 四川爱特尔科技有限公司 | Multi-switching-value combinational logic state implementation method |
| CN104020714B (en) * | 2014-06-19 | 2016-11-23 | 广东润星科技股份有限公司 | The output of a kind of quickly distribution and input module and operational diagnostics method thereof |
| CN106443294A (en) * | 2016-08-15 | 2017-02-22 | 国家电网公司 | Verification method and device for input loops of secondary circuit of transformer substation protector |
| CN106443294B (en) * | 2016-08-15 | 2019-06-14 | 国家电网公司 | The method and equipment for the verification of the binary input circuit of the secondary circuit of the substation protection equipment |
| CN107465332B (en) * | 2017-05-23 | 2023-08-15 | 深圳市鸿哲智能系统工程有限公司 | 8-track power supply controller |
| CN107465332A (en) * | 2017-05-23 | 2017-12-12 | 深圳市鸿哲智能系统工程有限公司 | A kind of 8 rail road power-supply controller of electric |
| CN108845253A (en) * | 2018-10-09 | 2018-11-20 | 华北电力大学（保定） | A kind of switch quantity acquisition circuit |
| CN111198522A (en) * | 2019-11-28 | 2020-05-26 | 广州民航职业技术学院 | Interface circuit including multiple output types and control method thereof |
| CN111045340A (en) * | 2019-12-03 | 2020-04-21 | 北京计算机技术及应用研究所 | Network intelligent power distribution equipment |
| CN111045340B (en) * | 2019-12-03 | 2023-10-20 | 北京计算机技术及应用研究所 | Network intelligent power distribution equipment |
| CN114325359A (en) * | 2020-09-28 | 2022-04-12 | 深圳市德安通科技有限公司 | Wireless multi-way switch dynamic monitoring method |
| CN113376535A (en) * | 2021-06-18 | 2021-09-10 | 深圳市康奈特电子有限公司 | Automatic testing system of new energy battery |
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Application publication date: 20100512 |