CN201344961Y

CN201344961Y - Remote wireless security monitoring device for distributed lightening arresters

Info

Publication number: CN201344961Y
Application number: CNU2008202145819U
Authority: CN
Inventors: 胡钢; 江冰; 张金波; 张学武
Original assignee: Changzhou Campus of Hohai University
Current assignee: Changzhou Campus of Hohai University
Priority date: 2008-12-16
Filing date: 2008-12-16
Publication date: 2009-11-11
Anticipated expiration: 2018-12-16

Abstract

The utility model discloses a remote wireless security monitoring device for distributed lightening arresters, comprising a router, a monitoring computer, a monitoring client computer, a distributed field detection terminal and a mobile base station. The field detection terminal transmits the running parameters of the lightening arresters to the mobile base station through wireless remote transmission; an Internet network is sequentially connected with the router and the monitoring computer; the monitoring client computer is connected to the lower end of the monitoring computer; and the mobile base station transmits signals to the router through the Internet network. The utility model adopts the GPRS technology to carry out remote, real-time and on-line monitoring on the dispersively distributed lightening arresters in field in a non-contact and network mode to ensure the safe running of an electric grid, knows the running status of the lightening arresters in real time through inquiring from the Internet, processes the collected data to obtain the size of resistive current, realizes the wireless transmission of the data through accessing the GPRS into the Internet and operates remote monitoring software for inquiring and the monitoring data and for operation; and the monitoring mode is accurate and convenient, is in real time and has strong practicality.

Description

A kind of distributed lightning arrester long distance wireless safety monitoring assembly

Technical field

The utility model relates to a kind of distributed lightning arrester long distance wireless safety monitoring assembly, realizes the be struck by lightning collection of information such as number of times of the phase angle of the full Leakage Current of lightning arrester (MOA), full Leakage Current and voltage and lightning arrester.

Background technology

Since the seventies in 20th century, various countries have carried out research in depth to Zinc-Oxide Arrester (MOA) and detection mode thereof.Present Zinc-Oxide Arrester both domestic and external is most to be no gap, because it bears the influence of working voltage and various external factors for a long time at run duration, has quickened the zinc oxide valve plate deterioration, therefore need regularly detect its performance condition.The detection mode of initial lightning arrester adopts the power failure manual detection, along with the appearance of new technology with to going deep into that Zinc-Oxide Arrester is studied, has engendered some semi-on-line detecting instruments.These instruments are easy to carry, use simple, the dismounting Zinc-Oxide Arrester need not have a power failure, directly measure the performance parameters such as leakage current, voltage of Zinc-Oxide Arrester, improved work efficiency greatly, the Zinc-Oxide Arrester on-Line Monitor Device major part of research and development all is this semi-on-line monitoring device both at home and abroad at present, needs artificial regularly copying to the scene to fetch data.Yet the lightning arrester installation environment is general relatively more abominable, and relatively disperses, and there are many weak points in this mode of manual inspection that needs at aspects such as real-time, accuracy and applications.Occurred on-line monitoring system subsequently, do not needed manually to the on-the-spot operation conditions that just can understand lightning arrester in real time that detects by this system based on bus-type.Characteristics such as adopt that field bus technique has that agreement is simple, fault-tolerant ability is strong, security is good, long transmission distance, antijamming capability are strong, but because the lightning arrester layout is relatively disperseed, if adopting bus mode monitors, then need facilities such as cable laying or optical cable, very inconvenient, cost is too big, and extensibility is not strong.

Along with the Communication in China technology develops by leaps and bounds, increasing new technology is applied to industrial monitoring.GPS (GPRS) has obtained increasing system operator and system development merchant's attention as a kind of new business of mobile phone communications (GSM) network, and is widely applied in all kinds of supervisory systems.

Summary of the invention

The purpose of this utility model is for overcoming the deficiencies in the prior art, a kind of distributed lightning arrester long distance wireless safety monitoring assembly is provided, the GPRS technology is applied in this device, can be in time, accurately, the operation conditions of overall understanding lightning arrester.

The technical solution adopted in the utility model is: comprise router, supervisory control comuter, monitor client computing machine, also comprise distributed on-the-spot sense terminals and mobile base station, described on-the-spot sense terminals is transferred to the mobile base station with detected lightning arrester operational factor by wireless remote, and the Internet network connects router and supervisory control comuter successively; The monitor client computing machine is connected the lower end of supervisory control comuter; The mobile base station is arrived router with signal by the Internet Network Transmission.

The beneficial effects of the utility model are:

1, the lightning arrester that disperses is implemented long-range, contactless, networking and real time on-line monitoring ensures electric power netting safe running to adopt the GPRS technology that the scene is distributed, and the related work personnel recognize the operation conditions of lightning arrester in real time by the online inquiry.This monitoring mode is accurate, real-time, convenient, practical.

2, handle gathering the data of coming, draw the size of current in resistance property, and by GPRS access (the Internet) Internet, realize the wireless transmission of data, Surveillance center's configuration monitoring computing machine and operation remote monitoring software provide inquiry of long-distance distribution formula lightning arrester Monitoring Data and operation for power management person.

Description of drawings

Below in conjunction with accompanying drawing and embodiment utility model is described in further detail.

Fig. 1 is a group-network construction synoptic diagram of the present utility model;

Fig. 2 is an on-the-

spot sense terminals

31,32 among Fig. 1 ... the component units block diagram of n;

Fig. 3 is an on-the-

spot sense terminals

31,32 among Fig. 1 ... n central processing unit minimal configuration and resource allocation map;

Fig. 4 is an on-the-

spot sense terminals

31,32 among Fig. 1 ... the n signal inserts the gating unit circuit diagram;

Fig. 5 is an on-the-

spot sense terminals

31,32 among Fig. 1 ... n realizes thunderbolt number of times counting unit circuit theory diagrams;

Fig. 6 is an on-the-

spot sense terminals

31,32 among Fig. 1 ... n signal condition element circuit schematic diagram;

Fig. 7 is an on-the-

spot sense terminals

31,32 among Fig. 1 ... n gathers the software flow pattern of electric current, voltage and processing;

Fig. 8 is an on-the-

spot sense terminals

31,32 among Fig. 1 ... n sends the process flow diagram of data;

Fig. 9 is that supervisory control comuter 37 is set up the process flow diagram of communicating by letter between communication and the on-site terminal among Fig. 1;

Figure 10 is the software architecture figure of supervisory control comuter 37 operation monitoring management information system among Fig. 1.

Embodiment

As shown in Figure 1, the utility model is by distributed on-the-spot sense terminals 31, a sense terminals 32, and a sense terminals n (on-the-spot sense terminals quantity can reach n＜65536), mobile base station 41, Internet network 35, router three 6, supervisory control comuter 37, monitor client computing machine 38, monitor client computing machine 39, monitor client computing machine 40 are formed.Wherein, on-the-

spot sense terminals

31,32 ... n is transferred to mobile base station 41 with detected lightning arrester operational factor by wireless remote, and Internet network 35 connects router 36 and supervisory control comuter 37 successively; Monitor

client computing machine

38,39,40 is connected the lower end of supervisory control comuter 37.Mobile base station 41 is transferred to router three 6 with signal by Internet network 35.Mobile base station 41, Internet network 35 and router three 6 are public information infrastructure; Distributed on-the-spot sense terminals 31, a sense terminals 32, a sense terminals n finishes the wireless remote transmission that the real-time online of lightning arrester operational factor is detected and realizes by radio access module operational factor; Described supervisory control comuter 37 is finished the remote monitoring of on-the-spot lightning arrester operation conditions, Long-distance Control sense terminals working method and relevant information management and user management.

The utility model can be realized the be struck by lightning collection of information such as number of times of the phase angle of the full Leakage Current of lightning arrester, full Leakage Current and voltage and lightning arrester, handle gathering the data of coming simultaneously, draw the size of current in resistance property, and by GPRS access Internet, realize the wireless transmission of data, Surveillance center's configuration monitoring computing machine 37 and operation remote monitoring software provide inquiry of long-distance distribution formula lightning arrester Monitoring Data and operation for power management person.

As Fig. 2, the on-the-

spot sense terminals

31,32 of the utility model ... n by current/voltage conversion and

amplification module

1,2,3,

voltage comparator circuit

4,5,6,7,8,9, phase

signal extract circuit

10,11,12, signal data selects circuit 13, counting thunder circuit 14, CPU (central processing unit) circuit 15, LCD LCD MODULE 16, GPRS wireless communication module 17,

current sensor

21,23,25,

voltage sensor

22,24,26 to form.

Current sensor

21,23,25 connects

voltage comparator circuit

4,6,8 respectively after connecting current/voltage conversion and

amplification module

1,2,3 respectively again.Described

voltage sensor

22,24,26 connects

voltage comparator circuit

5,7,9 respectively.

Voltage comparator circuit

4,5,

voltage comparator circuit

6,7,

voltage comparator circuit

8,9 are connected phase signal in twos respectively

extract circuit

10,11,12 back access signal datas selection circuit 13.Select circuit 13 to be connected CPU (central processing unit) circuit 15 signal data with counting thunder circuit 14; The lower end of CPU (central processing unit) circuit 15 connects LCD LCD MODULE 16 and GPRS wireless communication module 17.

Described current transformer 21 (model: CHB-300S), current transformer 23 (model: CHB-300S), current transformer 25 (model: CHB-300S) finish the collection of full Leakage Current, the signal of collection inputs to current/voltage conversion and amplification module 1, current/voltage conversion and amplification module 2, current/voltage conversion and amplification module 3 respectively, is directly inputted into voltage comparator circuit 4, voltage comparator circuit 6, voltage comparator circuit 8 respectively after full Leakage Current signal process current/voltage conversion and amplification module are handled; Described voltage sensor 22, voltage sensor 24, voltage sensor 26 are finished the collection of voltage signal, and the signal of collection is directly inputted into voltage comparator circuit 5, voltage comparator circuit 7, voltage comparator circuit 9 respectively; Described current/voltage conversion and amplification module 1, current/voltage conversion and amplification module 2, current/voltage conversion and amplification module 3 are voltage signal and are amplified in the 0-5V scope the low current signal linear transformation of current sensor collection; Described voltage comparator circuit 4, voltage comparator circuit 5, voltage comparator circuit 6, voltage comparator circuit 7, voltage comparator circuit 8, voltage comparator circuit 9 are finished the conversion of sine wave signal to square-wave signal; Described phase signal extraction circuit 10, phase signal extract circuit 11, phase signal extracts the XOR that circuit 12 is finished two-way voltage comparator output signal separately, operation result is separately inputed to signal data selection circuit 13, under the control of CPU (central processing unit) circuit 15, select to read in CPU (central processing unit) circuit 15; Described counting thunder circuit 14 is gathered the suffered thunderbolt number of times of lightning arrester, directly exports CPU (central processing unit) circuit 15 to; Described LCD LCD MODULE 16 is used to show that all kinds of parameters and the man-machine interaction of being gathered dispose on-the-spot sense terminals; Described GPRS wireless communication module 17 (product type: AEC-DS00) be connected with on-the-spot sense terminals asynchronous serial, adopt point-to-point mode to realize the remote data wireless transmission of terminal to the band communication function, embedded ICP/IP protocol, transparent finishing between Surveillance center and the on-site terminal by Internet interactive command and data.

Fig. 3 is an on-the-spot sense terminals 31 of the present utility model, 32 ... n central processing unit minimal configuration and resource allocation map, central processing unit U10 selects 8 Low-Power CMOS microprocessor (models: ATmega128) based on the AVR risc architecture for use, this microprocessor has the In-System Programmable Flash of 128K byte, the EEPROM of 4K byte, the SRAM of 4K byte, 53 general purpose I/O ports, 32 general purpose working registers, real-time clock RTC, 4 timer/counters (T/C) that have comparison pattern and PWM function flexibly, two USART, 8 path 10 position ADC, the programmable watchdog timer of sheet internal oscillator, the SPI serial port, with the jtag test interface of IEEE11491 standard compatibility, and the six kinds of battery saving modes that can select by software; Wherein general I/O port PD0, PD1 are used for communicating by letter with the GPRS module interface, general I/O port PD2, PD3, the PD4 time counting number input that is used to be struck by lightning; General I/O port PA0, PA1, PA2 are used for the collection of simulated data; Data line D0-D7 is directly corresponding with the data line of display module U11 directly to link to each other, and the 4th, the 5th of general I/O port PA5, PA6, PA7 and display module U11 directly links to each other with the 6th pin; General I/O port PD6, PD7 gather the signal of data selection circuit 13 outputs among Fig. 2.

Be on-the-

spot sense terminals

31,32 of the present utility model as shown in Figure 4 ... the n signal inserts the gating unit circuit, (model: CD4052) form, the 12nd pin of gating integrated circuit U1, the 14th pin and the 15th pin are used to insert the full leakage current of lightning arrester A, B, C three-phase to mainly contain gating integrated circuit U1; The 1st pin of gating integrated circuit U1, the 5th pin and the 2nd pin are used to insert lightning arrester A, B, C voltage in three phases; The 10th pin of gating integrated circuit U1, the 9th pin are used for directly directly linking to each other with PB1 with the PB0 of the central processing unit U10 of Fig. 3.

Be on-the-

spot sense terminals

31,32 of the present utility model as shown in Figure 5 ... n realizes thunderbolt number of times counting unit circuit theory diagrams, main Resistor-Capacitor Unit, diode D5, voltage stabilizing diode D2 (15V), voltage stabilizing diode D3 (15V), voltage stabilizing diode D4 (5V), voltage stabilizing diode D6 (5V) by electric bridge U5, optocoupler U6, phase inverter U7, necessity; The output of described optocoupler U6 directly directly links to each other with the 1st pin of phase inverter U7, the output of the 2nd pin of phase inverter U7 directly with Fig. 3 in the PD2 of central processing unit U10 directly link to each other, thunderbolt number of times counting unit circuit described in the utility model has 3 the tunnel, and hardware is formed identical.

Be on-the-

spot sense terminals

31,32 of the present utility model as shown in Figure 6 ... n signal condition element circuit schematic diagram is mainly by operational amplifier U2 (model: OP07), operational amplifier U3 (model: OP07), Sheffer stroke gate U4-1A, Sheffer stroke gate U4-2B, stabilivolt D19, stabilivolt D20, stabilivolt D21, stabilivolt D22 and Resistor-Capacitor Unit that some are necessary form.The 6th pin of described operational amplifier U2 directly directly links to each other with the 2nd pin with the 1st of Sheffer stroke gate U4-1A by connecting resistance R _ U_7; The 6th pin of described operational amplifier U3 directly directly links to each other with the 2nd pin with the 1st of Sheffer stroke gate U4-2BA by connecting resistance R _ I_7.

Be on-the-

spot sense terminals

31,32 of the present utility model as shown in Figure 7 ... n gathers the software flow pattern of electric current, voltage and processing; The collection in worksite terminal is the central processing unit of core with ATmega128, and it has one 10 successive approximation type a/d C.On-the-spot sense terminals is gathered the software of electric current, voltage and processing and realized realizing based on following principle: ADC is connected with the analog multiplexer of one 8 passage, can sample to 8 road single ended input voltages from port A, the single ended voltage input is a benchmark with 0V.This ADC also supports 16 tunnel differential voltages input combination, and the input of two-way difference has the programmable-gain level.Can start ADC by the ADEN that the ADCSRA register is set.Have only when ADEN set reference voltage and input channel to select just to come into force.Not power consumption of ADC during the ADEN zero clearing was closed ADC before entering energy-conservation sleep pattern.ADC converts the aanalogvoltage of importing to one 10 digital quantity by the method for approaching one by one.Start ADSC position, conversion position one writing to ADC and can start single conversion.In transfer process, this position remains high up to EOC, then by the hardware zero clearing.If selected the another one passage in transfer process, ADC can finish current conversion before changing passage so.The ADC transformation result is 10, and transformation result is deposited among adc data register ADCH and the ADCL, and transformation result is a Right Aligns under the default situations.The result of single conversion is as follows:

ADC＝VIN*1024/VREF

In the following formula, VIN is the input voltage of selected sampling pin, and VREF is reference voltage (its value is 5V in native system).The minimum value of transformation result is represented GND, and on behalf of the voltage on the AREF pin, maximal value deduct 1LSB again.If the use differential path, the result is:

ADC＝(VPOS-VNEG)*GAIN*512/VREF

In the following formula, VPOS is the input pin positive voltage, and VNEG is the input pin negative voltage, and GAIN is selected gain factor, and VREF is a reference voltage.The result represents with 2 complement form, from 0x200 (512d) to 0x1FF (+511d).After starting once conversion, transformation result is stored in the data register, by read data register ADCW, current data-switching result can be taken out.In case read ADCW, ADC just has been prevented from the addressing of data register.That is to say, ADC EOC once again before reading ADCW, the data of data register can not upgraded yet, thereby have guaranteed that transformation result do not lose.After ADCW was read out, ADC can visit ADCH and ADCL register once more.ADC comprises a sampling hold circuit, keeps constant to guarantee the voltage that is input to ADC in transfer process.Under implied terms, approaching circuit one by one needs an ADC clock frequency from 50kHz to 200kHz to obtain bigger precision.If it is higher that required conversion accuracy requires, import the ADC clock frequency so and can be higher than 200kHz, to reach higher sampling rate.The acquisition of ADC clock frequency is finished by frequency divider.The ADC module comprises a pre-divider, and it can produce acceptable ADC clock by any cpu clock that surpasses 100kHz.In the sense terminals, utilize timer T2 control sampling time interval at the scene, promptly the A/D of IE that once overflows of T2 gathers and conversion, and the result of each conversion is stored in a slice continuous data space of appointment, in order to ensuing data processing.

Be on-the-

spot sense terminals

31,32 of the present utility model as shown in Figure 8 ... n sends the process flow diagram of data, on-the-

spot sense terminals

31,32 ... the detected lightning arrester operational factor of n finally is to send on the supervisory control comuter 37 by the GPRS module, need simultaneously to receive the control command that supervisory control comuter 37 sends, and make correspondingly reaction.Its principle of work is: on-the-

spot sense terminals

31,32 ... n sends connection requests by particular port (what select for use at the native system middle port is 4096) to supervisory control comuter 37, by the time connection request passes through, just send authentication information to supervisory control comuter 37, do not connect if identity just disconnects by authentication, restart new connection.In case identity just can send the packet that comprises the lightning arrester operation conditions to supervisory control comuter 37 by authentication.If packet successfully sends to supervisory control comuter 37, supervisory control comuter 37 is just to on-the-

spot sense terminals

31,32 ... n sends successful acknowledgement frame.If on-the-

spot sense terminals

31,32 ... n does not receive acknowledgement frame, thinks that then data have taken place wrong in transmission course or lose, and will send once more.If send 10 still failures, then disconnect connection, rebulid new connection.On-the-

spot sense terminals

31,32 ... the data that n sends over supervisory control comuter 37, at first whether judgment data sends to oneself, if whether send to the then judgment data of oneself correct, directly abandon for misdata, correct data is just carried out analyzing and processing.If data are control commands, then judge whether it is new control command, if new control command is then made correspondingly according to order and handled the control command of response monitoring computing machine 37.In native system, on-the-

spot sense terminals

31,32 ... it is self-defining that n sends the packing data form, contains the current in resistance property of three-phase lightning protector in the packet that a secondary data sends, and phase differential, and thunderbolt number of times are as shown in the table:

Receive data: DDATAA:T070928 Z000.10X033.90 L00000 B:T070928 Z000.79

X085.00?L00000?C：T070928?Z000.21?X226.61?L00000

Receive data: DATAA:T070928 Z000.10X033.12 L00000 B:T070928 Z000.79

X084.99?L00000?C：T070928?Z000.23X225.48?L00000

Be that supervisory control comuter 37 is received on-the-

spot sense terminals

31,32 twice in the last table ... the data that n sends over by GPRS wireless transmission terminal.Wherein, " A: " is A phase data, and " T070928 " is the time that data send, and " Z000.10 " is current in resistance property, and " L00000 " is the thunderbolt number of times.The data of " B: " and " C: " back are B, C phase data.This data layout is a kind of main form that on-the-spot sense terminals sends data.

As Fig. 9 is that supervisory control comuter 37 of the present utility model is set up communication and on-

site terminal

31,32 ... the process flow diagram of communicating by letter between the n.The remote detection terminal is sent to supervisory control comuter 37 with detected lightning arrester operation conditions supplemental characteristic by GPRS wireless transmission terminal.The communication module program is responsible for receiving and handling these data, and data processed is stored in the data designated storehouse, and this modular program also is responsible for transmitting the control command that the keeper sends to the remote detection terminal simultaneously.Communication module adopts Socket communication, and supervisory control comuter 37 and remote detection terminal adopt the program development of model of client communication module mainly to use the Indy assembly.Indy (Internet Direct) is the Internet assembly of one group of open source code, has contained nearly all popular Internet agreement, and supports thread.The open source code of Indy assembly only need be made amendment the developer according to system requirements in its source code template, largely reduced developer's workload.After initialization finished, the communication module main thread started.And then the communication module main thread enables a watcher thread after starting.This watcher thread does not stop to monitor certain port, judges to have or not connection request.In case have remote terminal to send connection request, then send response frame to it.After remote terminal is received response frame, send identity information to supervisory control comuter 37.Whether supervisory control comuter 37 judges its identity, after authentication is passed through, judge that this is connected in the server to exist.If do not exist, then create all affairs that a new thread is responsible for handling this connection for this connection.For received each connection, supervisory control comuter 37 all can be handled all affairs of this connection request for this connection distributes a thread.After communication link was set up, the remote detection terminal just can send the packet that comprises lightning arrester operation conditions parameter to server.Because the GPRS wireless data transmission is easy to packet loss and mistake occurs, whether server end needs judgment data to make mistakes after receiving the packet that the remote detection terminal sends over.Whether judgment data makes mistakes mainly is to finish by data check.After receiving packet, take out its data message, carrying out the decimal system according to field adds up, result of calculation is compared with its subsidiary check information, handle accordingly after the judgement: if the verification of calculating is with identical with subsidiary check information, think that then data are correct, deposit in then in the database; Then do not think loading error occurring if do not wait.As keeper during to remote detection terminal transmitting control commands, the communication module program is responsible for transmitting control command.The remote detection terminal is received control command, and does corresponding operating according to order.After operation is finished, send acknowledgement frame to server.Server is received that acknowledgement frame is then thought and is controlled successfully.If server is not received acknowledgement frame, think that then control command sends failure, start to retransmit, till receiving acknowledgement frame.

Be the software architecture figure of supervisory control comuter 37 operation monitoring management information system of the present utility model as shown in figure 10.This system software mainly is made up of three parts: system management subsystem, information inquiry subsystem and Long-distance Control subsystem.System management subsystem mainly is to be responsible for user profile and authority are managed and database is safeguarded.Aspect user management, the user is divided into three ranks: power user, keeper and domestic consumer.The power user can managing user information, and user right is set, and database is safeguarded, and the remote detection terminal is controlled.Unique difference of keeper and power user is that the keeper can not be provided with authority to the user.Domestic consumer is the information in the Query Database only, revises self password, can not control remote terminal, can not safeguard database.Be to consider why for security of system with user's classification.The user need verify operation user's legitimacy when landing the monitoring management infosystem.After the data process demonstration validation that the remote detection terminal sends is errorless, adopts the ADO technology to handle function it is deposited in the database specific on the server in conjunction with character string among the DELPHI.Database on the server has adopted relatively to be popularized and popular large-scale relationship type SQL database at present.It can satisfy the preservation of data long-term safety fully, also can satisfy the user database on the server is inquired about and attended operation.The information inquiry subsystem is open towards all users, and it mainly is to realize the query manipulation of user to database, allows the user understand the operation conditions of each lightning arrester of telework.In query script, system provides two kinds of inquiry modes.A kind ofly be: inquire about according to the time period; Another is: the sequence number (GSM card number) according to the lightning arrester sense terminals is inquired about.The user can inquire about according to arbitrary mode that self needs is chosen wherein.Inquire about according to the time period, the user at first needs to choose check box, choosing the start time point and the concluding time that need inquiry then puts need to determine the time period of inquiry, which phase lightning arrester operational factor what choose the needs inquiry at last is, after selection finishes, click inquire button, Query Result will show.The mode that current popular sql like language and ADO technology combine has mainly been used in the realization of inquiry subsystem.SQL is a Structured Query Language (SQL).The major function of sql like language is exactly to set up with various databases to get in touch and link up.According to the regulation of ANSI (ANSI), SQL is used as the standard language of Relational DBMS.Sql like language is simple for structure, and is powerful, easy to learn, so since IBM Corporation released in 1981, sql like language had obtained using widely.Large-scale data base management system (DBMS) all supports sql like language as query language at present.Aspect inquiry, sql like language has demonstrated its strong functions and advantage.ADO is that Microsoft provides the high-level interface to various data layouts, and this interface has become the new standard of accessing database, and has obtained application [39] widely.The developer has two kinds of methods to connect when using the ADO accessing database:

First method is to use TADOConnection to set up and being connected of ADO database.

Second method is directly to use TADODataSet, TADOQuery, and TADOTable, TADOStoredProc connects database.After using first method, other assembly can be shared this connection.This method is fairly simple, and is easy to operate, so select for use first method as the mode that connects database in the native system performance history.The component resources of Delphi ADO assembly page or leaf is abundanter, and the assembly of mainly using in the book systems development process is the ADOConnection assembly in this assembly page or leaf, ADOTable assembly and ADOQuery assembly.Also need to use DataSource assembly and DBGrid assembly in other assembly pages or leaves.The ADOConnection assembly is responsible for connecting database; The ADOQuery assembly is responsible for visiting master meter, and its Connection attribute is set to ADOConnection, and its SQL attribute is the place that is used for depositing SQL statement; ADOTable is responsible for visiting sublist, realizes the structure of a master/slave table; The DBGrid assembly is responsible for the data of specific field in the video data table.

The major function of this subsystem is to realize the inquiry of user to data, realizes that the dynamic queries general step is:

Call the Close method of ADOQuery assembly and close this assembly.

Call the Clear method of ADOQuery assembly SQL attribute and remove original SQL statement.

Call the Add method of ADOQuery assembly SQL attribute and add new SQL statement.

Call the ExecSQL method of ADOQuery assembly and carry out new SQL statement.

Its corresponding code is as follows:

ADOQuery1.Close；

ADOQuery1.SQL.Clear；

ADOQuery1.SQL.Add(strsql)；

ADOQuery1.ExecSQL；

Wherein strsql is a SQL statement, employing be sql like language, this statement is will be to the operation of database.

The monitoring management infosystem not only can be inquired about the operation conditions of each lightning arrester, also can control GPRS wireless transmission terminal to the working method of lightning arrester sense terminals simultaneously and can automatic dialing initiatively initiate to connect to supervisory control comuter 37 behind each the startup.After GPRS wireless transmission terminal is connected to GPRS network, can dynamically obtain an IP address, this IP address is mobile backbone network address.When not entering connection status, supervisory control comuter 37 is to communicate with remote terminal.Therefore only after the route that connects is set up, supervisory control comuter 37 could and the remote detection terminal communicate.

The GPRS wireless transmission terminal of using in the utility model has the function of link keep-alive, promptly by timed sending " heartbeat " packet, keeps the route between remote terminal and the supervisory control comuter 37, guarantees the unimpeded always of link.Yet because the instability of wireless transmission, this online always unimpeded also be relative.Therefore, when the user when 37 pairs of certain long-range lightning arrester sense terminals of supervisory control comuter are controlled, to check at first whether communication line normal, only under the normal situation of communication link, could control the sense terminals of long-range lightning arrester.The steering order form is self-defining, and sends to each remote detection terminal by monitoring server.

The steering order form is :+ML+MUM+MOD+END

ML: what expression sent is control word, is the order first symbol.

MUM: the numbering of expression remote detection terminal is the GSM card number in native system.

MOD: the remote detection terminal operating mode of indicating to be provided with, M (minute) are represented per minute drainage pattern (being collection in real time in native system); D (day) represents the pattern of gathering every day once; R (read) is drainage pattern at once; The time format that if MOD is a 4-digit number to be formed, this that then represent every day gathered constantly.

END: expression order end mark.

+: blank character.

Such as, complete order a :+ML+13584528972+M+END, the meaning of this order is that requirement ID is 13584528972 effective the collection once of remote detection terminal per minute circulation.

The online sense terminals of on-the-spot distributed lightning arrester, its detection principle is: to the phase angle of the full Leakage Current I of lightning arrester (MOA), full Leakage Current and voltage

Gather, thus the size of acquisition resistive leakage current IR:

, when the MOA deterioration, current in resistance property is increased to IR1 from IR, capacity current is increased to IC1 from IC, total current is increased to I1 from I, the phase angle of full Leakage Current and voltage from Reduce to

1, wherein the most obvious with the variation of resistive leakage current IR, be convenient to terminal system collection and processing.The online sense terminals of on-the-spot distributed lightning arrester is selected 8 AVR microprocessor ATMEGA16 of atmel corp's high-performance, low-power consumption for use on hardware, this microprocessor has adopted advanced risc architecture, inner integrated 8 tunnel 10 A/D converters, (model: CHB-300S), this sensor is the magnetic balance current sensor to current sensor employing Hall closed loop current sensor in the system.Full Leakage Current produces magnetic field on every side what it was flowed through, and the size in magnetic field is directly proportional with the size of the full Leakage Current that flows through, and this magnetic field can be assembled by soft magnetic material, is detected by hall device.Because the variation in magnetic field and the output signal of hall device have good linear relationship, therefore can be by measuring the size that output signal just can directly reflect full Leakage Current.The electric current that collects is by current with high accuracy/voltage transitions chip (model: MAX472), can obtain voltage signal at the output terminal of chip.Voltage signal is to obtain by voltage transformer (VT) (TV).The primary side of voltage transformer (VT) is identical with the primary side voltage of lightning arrester, can detect voltage signal on the lightning arrester exactly at the secondary side of voltage transformer (VT).Adopt zero passage method to obtain the two-way square-wave signal respectively the two-way sinusoidal signal that obtains by the zero passage voltage comparer, with this two-way square-wave signal by after XOR gate, obtain containing the signal of phase differential, MCU obtains phase differential by the pulsewidth that measures this output signal

The wireless wide area network access device is selected GPRS transparent data transport module (product type: AEC-D300).GPRS transparent data transport module is made up of GPRS mobile communication module and data communication processing module two large divisions.This module is utilized mobile network's GPRS technology, adopts point-to-point mode to realize the remote data wireless transmission of terminal to the band communication function.Module is a core with the GPRS communication technology and singlechip technology, and embedded ICP/IP protocol is finished the acceptance decoding of the order that Surveillance center sends by Internet, the coding and the transmission of terminal return data automatically.It is wide to have a communication range based on the data transmission of GPRS network, transmits characteristics such as reliable and stable.Basic function: 1, transparent data transmission: the GPRS module directly provides the RS-232/422/485 interface, for user's data equipment provides transparent transmission channel; 2, always online: GPRS can go up GPRS network automatically once starting shooting, and sets up communication link with data center, receives and dispatches the data of user data equipment at any time; 3, charge by flow: collect the charges according to receiving and send quantity of data packets, when not having the transmission of data traffic, usefulness is free of charge; 4, high-speed transfer: the height of speed depends on the network settings of mobile operator, according to the network condition of China Mobile, can provide the stable data transmission of 20 ~ 40Kbps at present.

Technical parameter

● overall dimensions: 98mm*70mm*36mm

● weight: 270g+/-5g

● operating ambient temperature :-30 ℃～+ 70 ℃ relative humidity: 95% (nothing is condensed)

● input voltage: DC 9V/1A normal voltage: 12V

● power consumption: communication average current 220mA@9VDC; Online standby current 25mA@9VDC

● baud rate: serial data interface speed: 600 to 57,600bps

● communication interface: RS232, RS485, Transistor-Transistor Logic level

● antennal interface: 50 Ω/miniature antenna interface

● the GSM900/DCS1800 double frequency meets ETSI GSM phase 2/2+ standard

● the ICP/IP protocol stack is supported TCP, UDP, FTP, SOCKET, TELNET, POP3, SMTP, HTTP etc.

Remote online monitoring system relies on computer communication network and database technology, adopts database technology to set up archives for each MOA on the server of remote monitoring center.Power management person carries out the monitoring, diagnosing between the strange land by remote monitoring software, promptly realizes the prediction and the judgement of MOA state.The remote online monitoring software architecture diagram as shown in Figure 4, C/S model is adopted in its design, developing instrument is selected for use at database and the powerful Delphi 7 of network facet, database adopts SQLServer2000.

The quality that power management person judges MOA by current in resistance property value and its suffered thunderbolt number of times of inquiry lightning arrester.If finding has the MOA parameter undesired, the ruuning situation that can be by inquiring about other lightning arrester in same group and the historical data information of this lightning arrester are judged the operation conditions of this MOA.If this MOA is aging really, determine the position at its place, in time notify the power station staff that it is handled.Power management person can also carry out necessary deletion, change and other operation to the data of lightning arrester monitor database on the supervisory control comuter 37, and the non-administrator is merely able to inquiry, download and print data.

Claims

1. distributed lightning arrester long distance wireless safety monitoring assembly, comprise router (36), supervisory control comuter (37), monitor client computing machine (38,39,40), it is characterized in that: also comprise distributed on-the-spot sense terminals (31,32 ... n) and mobile base station (41), described on-the-spot sense terminals (31,32 ... n) detected lightning arrester operational factor is transferred to mobile base station (41) by wireless remote, Internet network (35) connects router (36) and supervisory control comuter (37) successively; Monitor client computing machine (38,39,40) is connected the lower end of supervisory control comuter (37); Mobile base station (41) is transferred to router (36) with signal by Internet network (35).

2. a kind of distributed lightning arrester long distance wireless safety monitoring assembly according to claim 1 is characterized in that: described on-the-spot sense terminals (31,32 ... n) by current/voltage conversion and amplification module (1,2,3), voltage comparator circuit (4,5,6,7,8,9), phase signal extracts circuit (10,11,12), signal data is selected circuit (13), counting thunder circuit (14), CPU (central processing unit) circuit (15), LCD LCD MODULE (16), GPRS wireless communication module (17), current sensor (21,23,25), voltage sensor (22,24,26) form; Described current sensor (21,23,25) connects voltage comparator circuit (4,6,8) respectively after connecting current/voltage conversion and amplification module (1,2,3) respectively again; Described voltage sensor (22,24,26) connects voltage comparator circuit (5,7,9) respectively; With voltage comparator circuit (4,5), voltage comparator circuit (6,7), voltage comparator circuit (8,9) connects phase signal in twos respectively and extracts circuit (10,11,12) back access signal data selection circuit (13), selects circuit (13) to be connected CPU (central processing unit) circuit (15) with counting thunder circuit (14) signal data; The lower end of CPU (central processing unit) circuit (15) connects LCD LCD MODULE (16) and GPRS wireless communication module (17).

3. a kind of distributed lightning arrester long distance wireless safety monitoring assembly according to claim 2, it is characterized in that: on-the-spot sense terminals (31,32 ... n) central processing unit U10 has the In-System Programmable Flash of 128K byte, the EEPROM of 4K byte, the SRAM of 4K byte, 53 general purpose I/O ports, 32 general purpose working registers, real-time clock RTC, 4 timer/counters (T/C) that have comparison pattern and PWM function flexibly, two USART, 8 path 10 position ADC, the programmable watchdog timer of sheet internal oscillator, the SPI serial port, the battery saving mode that can select by software with the jtag test interface of IEEE11491 standard compatibility and six kinds; Data line D0-D7 is directly corresponding with the data line of display module U11 directly to link to each other, and the 4th, the 5th of general I/O port PA5, PA6, PA7 and display module U11 directly links to each other with the 6th pin; On-the-spot sense terminals signal (31,32 ... n) insert gating integrated circuit U1, the 12nd pin of gating integrated circuit U1, the 14th pin and the 15th pin insert the full leakage current of lightning arrester A, B, C three-phase; The 1st pin of gating integrated circuit U1, the 5th pin and the 2nd pin insert lightning arrester A, B, C voltage in three phases; The 10th pin of gating integrated circuit U1, the 9th pin link to each other with PB1 with the PB0 of central processing unit U10.

4. a kind of distributed lightning arrester long distance wireless safety monitoring assembly according to claim 2, it is characterized in that: described counting thunder circuit (14) element circuit has 3 the tunnel, mainly is made up of electric bridge U5, optocoupler U6, phase inverter U7, Resistor-Capacitor Unit, diode D5, voltage stabilizing diode D2 (15V), voltage stabilizing diode D3 (15V), voltage stabilizing diode D4 (5V), voltage stabilizing diode D6 (5V); The output of described optocoupler U6 directly links to each other with the 1st pin of phase inverter U7, and the 2nd pin output of phase inverter U7 links to each other with the PD2 of central processing unit U10; Described on-the-spot sense terminals (31,32 ... n) the signal condition element circuit is made up of operational amplifier U2, operational amplifier U3, Sheffer stroke gate U4-1A, Sheffer stroke gate U4-2B, stabilivolt D19, stabilivolt D20, stabilivolt D21, stabilivolt D22 and Resistor-Capacitor Unit; The 6th pin of described operational amplifier U2 directly directly links to each other with the 2nd pin with the 1st of Sheffer stroke gate U4-1A by connecting resistance R _ U_7; The 6th pin of described operational amplifier U3 directly links to each other with the 2nd pin by connecting the 1st of resistance R _ I_7 and Sheffer stroke gate U4-2BA.