CN103761913A - Current transformer simulation training system and working method - Google Patents
Current transformer simulation training system and working method Download PDFInfo
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- CN103761913A CN103761913A CN201410009660.6A CN201410009660A CN103761913A CN 103761913 A CN103761913 A CN 103761913A CN 201410009660 A CN201410009660 A CN 201410009660A CN 103761913 A CN103761913 A CN 103761913A
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Abstract
The invention provides a current transformer simulation training system and a working method of the current transformer simulation training system. The current transformer simulation training system comprises an instructor machine with a projection device, and student machines which are in communication connection with the instructor machine. Each student machine comprises a lower computer and a current transformer detection simulation platform, wherein each current transformer detection simulation platform comprises a control machine and simulators, and the simulators are connected with the control machines, and are used for testing current transformers. After an instructor carries out explanation, current transformer experiment connection can be carried out on students through the current transformer simulation training system; the working voltage and the working current of the current transformer simulation training system are much lower than the voltage and the current in the real environment, and the purpose that the reliable safety guarantee is provided for current transformer tests of the students under the conditions of the safe working voltage and the safe working current can be achieved.
Description
Technical field
The present invention relates to electric energy mutual-inductor field, relate in particular to a kind of Simulation of current transformer training system and method for work.
Background technology
Current domestic electric energy metering verification mobility of people is large, the renewal of knowledge is slow, professional knowledge and working level uneven, inter-disciplinary talent is on the low side, the technician who grasps mutual inductor field detecting technology is less, affected normal testing, mainly because training set lags behind, mainly with concentration theory training, lecture experiment, written exam and with on-the-spot one, be with first-class training method at present, all have significant limitation, training efficiency is very low.
And the training in actual environment, because electric energy measuring equipment has high voltage, large electric current, can produce potential safety hazard to the person and equipment, limited quality and the efficiency of training.
If can provide a kind of, can under the condition of low pressure, little electric current, operate, and function and the complete current transformer training system of Reality simulation equipment in appearance, so, the safe operation during to electric energy metering verification staff training will be very favourable.
Summary of the invention
For addressing the above problem, the invention provides a kind of Simulation of current transformer training system, the student's machine that comprises teacher's machine, the communication connection of some and teacher's machine, wherein,
Teacher's machine comprises that host computer, the projector equipment being connected with host computer, current transformer detect entity platform; Described host computer is for controlling the communication of whole system, and the slave computer parameter that realizes student's machine issues, current transformer training function; Described current transformer detects entity platform and comprises actual current lifting device, actual standard current transformer, actual tested current transformer, actual current Burden box, actual tester, actual pressure regulator;
Described student's machine comprise slave computer, with controller, pressure regulator, standard current transformer simulator, tested current transformer simulator, current lifting device simulator, mutual-inductor tester simulator, the current loading case simulator of slave computer communication connection, described each simulator is all connected with controller, wherein
Described current loading case simulator is for current loading case simulator that is virtually reality like reality;
Described standard current transformer simulator is for standard current transformer simulator function that is virtually reality like reality;
Described tested current transformer simulator is for the function of tested current transformer that is virtually reality like reality;
Described current lifting device simulator is for the function of current lifting device that is virtually reality like reality;
Described mutual-inductor tester simulator is for the function of mutual-inductor tester that is virtually reality like reality;
Described each simulator all has some simulation connection terminals, and described simulation connection terminal is for simulating the connection terminal function of entity;
Pressure regulator is connected with mutual-inductor tester simulator power unit by isolating transformer;
Controller is used for the signals collecting of the simulation connection terminal connections situation of each simulator, and is uploaded to its corresponding slave computer, and carries out the steering order that slave computer sends;
Slave computer is for uploading information, receive the parameter that host computer is set each simulator controller sending controling instruction information, reception controller, and carry out signal disposal and analysis, actual tests wiring situation when arranging on current transformer interface, is shown in the training of slave computer.
Preferably, described controller comprises a terminals driver output module, tail terminals Gather and input module, polarity and signal discrimination module, RS232 transceiver module, MCU module and power supply unit module; MCU module is connected with signal discrimination module is unidirectional with a terminals driver output module, tail terminals Gather and input module, polarity, is connected with RS232 transceiver module is two-way.Wherein,
Terminals driver output module, for receiving the drive control signal that MCU module is sent, applies low level to wiring the end of a thread to be judged;
The tail terminals Gather and input module line tail end signal scanning that is used for achieving a butt joint, inquiry is except the level state of unexpected other wiring tail ends of band judgement wiring one by one;
Polarity and signal discrimination module are used for realizing the amplification of signal, and realize the analog to digital conversion of signal;
RS232 transceiver module for the signal of tail terminals Gather and input module is transferred to host computer or by the steering order communication of host computer to corresponding simulator;
MCU module is used for control head terminals driver output module drive terminal stud to be judged, and constantly scans the logic level signal of tail terminals Gather and input module, judges the break-make relation of wiring between each simulation connection terminal;
Power supply unit module is used for to other each module for power supply.
Preferably, described host computer is provided with training current transformer interface is set, and described interface is divided into current mutual-inductor parameter setting area, current transformer nameplate viewing area, current transformer data area;
Described current mutual-inductor parameter viewing area can arrange the supplemental characteristic of the current transformer of each student's machine, and described parameter comprises no-load voltage ratio, polarity, load, grade, error;
Described current transformer nameplate viewing area, for showing in real time the setting value of parameters;
Current transformer data area shows fully loaded and underloading data in time in real time according to the setting value of parameters;
Described host computer is also provided with current transformer verification wiring diagram interface;
Described slave computer is provided with training current transformer interface is set, and described interface is divided into current transformer connection graph region, monitors area, current transformer nameplate region;
Described current transformer connection graph region shows the not wired wiring diagram of current transformer, and the connection layout after wiring, when student's wiring is correct, with black line, represents, during wiring error, with red line, represents;
Described supervision area is partly followed ratio difference, the angular difference that actual tester samples drawn and is partly followed the angular difference value that actual tester is sampled drawn for showing percentage tabular value, ratio that dial gauge is partly followed actual tester and sampled drawn;
The data value of the no-load voltage ratio that described current transformer nameplate viewing area demonstration teacher arranges, load, grade.
Preferably, described student's machine has six.
The method of work of described Simulation of current transformer training system, comprises the following step:
Step 1: host computer loading current transducer check wiring diagram interface, utilize projector projection, student is imparted knowledge to students;
Step 2: host computer loads training current transformer interface is set, creates host computer multithreading Thread, data buffer maxPacket, NetworkStream stream, for long-range transmission data are prepared; As loaded, train the success of current transformer interface is set, carry out subsequent step, otherwise return to host computer homepage;
Step 3: teacher arranges the supplemental characteristic of the current transformer of each student's machine in the current mutual-inductor parameter setting area of host computer;
Step 4: open first serial when slave computer loads training current transformer interface and be connected with actual tester, if success is carried out subsequent step, otherwise returned to slave computer homepage;
Step 5: first serial is entrusted and monitored, the data of the actual tester of real-time sense;
Step 6: slave computer is opened second serial and is connected with controller, if open just slave computer homepage immediately of failure, if opened successfully, carries out the following step;
Step 7: slave computer creates multithreading Thread, data buffer maxPacket, NetworkStream stream, for long-range reception data are prepared, creates second serial and entrusts monitoring, the data that real-time sense controller sends;
Step 8: host computer sends to each student's machine by supplemental characteristic by NetworkStream stream, the host computer multithreading Thread of establishment monitors data;
Step 9: slave computer receives and display parameter data supplemental characteristic with the multithreading Thread of its establishment, and when teacher's machine sends data again, this multithreading Thread can monitor and again receive data in real time;
Step 10: slave computer training arranges the region, viewing area at current transformer interface and monitors with the trust of second serial the data that monitoring controller sends, int[when data are different] number2=new int[48] reception data, and with the Split(of string) method decomposition data, by analyzing data, by the mode of line, show in real time every single line that each simulator connects;
Step 11: when slave computer training arranges after all wiring success of viewing area at current transformer interface, slave computer is enabled multithreading Thread, sends with NetworkStream stream the supplemental characteristic obtaining from host computer;
Step: 12: student carries out verification to current transformer, manual adjustments pressure regulator, the data that actual tester sends according to student's machine are carried out processes and displays, and to student's machine, send the detailed data of dial gauge every bit;
Step 13: slave computer is enabled the trust of first serial and monitored, when listening to actual tester buffer zone and have data, slave computer receives data, carries out verification, and data are directly abandoned in verification failure, and verification succeeds is storage data, reaches and receives data object;
Step: 14: decomposition data, obtain dial gauge, ratio, angular difference data, reach and show actual tester data object.
Preferably, in step 13, slave computer is taked odd even to the data that receive, and packet header 0x55, wraps big or small verification mode, verification succeeds array int[] number=new int[48] storage data.
Preferably, in step 9, described slave computer shows the data of no-load voltage ratio, load, three parameters of grade.
Preferably, in step 3, after all supplemental characteristics are all set, the data after the current transformer data area display setting at the loading training current transformer interface of host computer, otherwise do not show.
Preferably, when slave computer listens to data buffer maxPacket and changes, slave computer receives data again, storage data, and decomposition data, upgrades dial gauge, angular difference, than difference data, reaches the dial gauge that upgrades in time in real time, angular difference, than difference data object.
Preferably, slave computer training arranges in the region, viewing area at current transformer interface, when each simulator wiring is correct, with black line, represents, during wiring error, with red line, represents.
Beneficial effect of the present invention is:
The present invention adopts Computer real time simulation, the work on the spot environment that the simulation of analog current mutual inductor is examined and determine to greatest extent, provide at the standard current transformer simulator of equipment appearance, function complete simulation material object, tested current transformer simulator, mutual-inductor tester simulator, current lifting device simulator, current loading case simulator, the operating voltage of whole system and electric current be far smaller than true environment voltage and current, can realize under trouble free service voltage, electric current and provide reliable safety guarantee for student provides the training of current transformer.
Controller of the present invention meets the technical requirement of standard current transformer calibrating wiring simulation system or other similar simulation training systems completely, can realize all electronic, judge in real time, exactly the on off operating mode of simulation connection, and in time, constantly result data is uploaded to slave computer and does wiring misinterpretation etc. is further processed.
Slave computer can carry out test connection judgement to the simulation connection connection terminal of each simulator, and actual tests wiring situation can be shown on computers, excite to greatest extent student to the comprehension of work on the spot and actual operational capacity, improve rapidly student's operative skill, there is stronger production practical significance.
accompanying drawing explanation:
Fig. 1 is structured flowchart of the present invention.
Fig. 2 is the composition frame chart of student's machine.
Fig. 3 is the theory diagram of standard current transformer simulator.
Fig. 4 is the theory diagram of tested current transformer simulator.
Fig. 5 is the theory diagram of current loading case simulator.
Fig. 6 is the theory diagram of current lifting device simulator.
Fig. 7 is the theory diagram of mutual-inductor tester simulator.
Fig. 8 is controller principle module map.
Fig. 9 is the software principle block diagram of controller.
embodiment:
As shown in Figure 1, system global structure of the present invention is comprised of 1 cover teacher machine, 6 cover student machines, ethernet network communication equipment, and wherein teacher's machine is the Control on Communication main frame of whole system, simultaneously also as the actual detection platform of laboratory verification mutual inductor; Student's machine is exactly the mutual inductor simulation calibrating device at function complete simulation scene.
(1) teacher's machine:
Teacher's machine comprises system principal computer (host computer), projector equipment, the current transformer detection entity platform of giving lessons of imparting knowledge to students.
Described projector equipment, for by the host computer interface projection of teacher's machine, is imparted knowledge to students to student.
Described entity platform comprises actual current lifting device, actual standard current transformer, actual tested current transformer, actual current Burden box, actual tester, actual pressure regulator, and connects by actual.
The communication of described PC control whole system, realizes the functions such as student's machine parameter issues, the teaching of mutual inductor rudimentary knowledge, also can detect the transformer error verification that entity platform carries out entity in conjunction with current transformer.Therefore, teacher's machine is the Control on Communication main frame of whole system, and the while is as the actual detection platform of laboratory verification mutual inductor.
When " training " state, host computer can recall the current transformer verification wiring diagram that in computer, itself has, and utilizes projector projection, and student is imparted knowledge to students; Described current transformer calibrator wiring diagram shows the wiring situation of each simulator of exact connect ion.
Student accepts teaching and understands oneself and carry out wiring exercise, and receives teacher's machine monitoring.In the situation that student practises wiring voluntarily, described host computer is provided with training current transformer interface is set, and described training arranges current transformer interface and is divided into current mutual-inductor parameter setting area, current transformer nameplate viewing area, current transformer data area;
Described current mutual-inductor parameter viewing area can arrange the supplemental characteristic of the current transformer of each student's machine, and described parameter comprises no-load voltage ratio, polarity, load, grade, error;
Described current transformer nameplate viewing area, for showing in real time the setting value of parameters;
Current transformer data area shows fully loaded and underloading data in time in real time according to the setting value of parameters.
(2) ethernet network device
Described ethernet network device is realized the slave computer of each student's machine and communicating by letter of teacher's machine.Host computer and 6 slave computers form a network system, host computer can be had access to the demonstration operating mode of slave computer in real time, under " training " state, host computer and projector equipment composition teacher special use are given lessons and are commented on system, can carry out giving lessons and training of mutual inductor and calibrating knowledge.
(3) student's machine
Described student's machine comprises that a computing machine (slave computer) and current transformer detect anti-true platform, and described current transformer detection simulation platform comprises controller, pressure regulator, standard current transformer simulator, tested current transformer simulator, mutual-inductor tester simulator, current loading case simulator, current lifting device simulator.
Described slave computer is provided with training current transformer interface is set, and described interface is divided into current transformer connection graph region, monitors area, current transformer nameplate region;
Described current transformer connection graph region shows the not wired wiring diagram of current transformer, and the connection layout after wiring, when student's wiring is correct, with black line, represents, during wiring error, with red line, represents;
Described supervision area is partly followed ratio difference, the angular difference that actual tester samples drawn and is partly followed the angular difference value that actual tester is sampled drawn for showing percentage tabular value, ratio that dial gauge is partly followed actual tester and sampled drawn;
The data value of the no-load voltage ratio that described current transformer nameplate viewing area demonstration teacher arranges, load, grade.
Be illustrated in figure 2 the theory diagram of slave computer: slave computer is connected by RS232 serial ports with controller, standard current transformer simulator, tested current transformer simulator, mutual-inductor tester simulator, current loading case simulator are all connected with controller.
Below each simulator is described in detail respectively.
1. standard current transformer simulator
As shown in Figure 3, standard current transformer simulator comprises housing, is positioned at the current transformer of housing, is positioned at the some simulation connection terminals outside housing.
Describe in detail respectively below.
1. current transformer
As shown in Figure 3, described in, being positioned at the current transformer of housing is comprised of winding, Secondary Winding, iron core and a framework of mutually insulated, connection terminal etc.Its principle of work is substantially identical with transformer, and (N1) is less for the number of turn of a winding, is directly series in power circuit a load current (I
1) when the winding, the induction of the alternating flux of generation produces the secondary current (I reducing in proportion
2); The number of turn (the N of Secondary Winding
2) more, connect and form closed-loop path with the secondary load (Z) of the current coil such as instrument, relay, transmitter, winding has with Secondary Winding the ampere-turn equating due to one time, I
1n
1=I
2n
2, in current transformer rated transformation ratio current transformer actual motion, load impedance is very little, and Secondary Winding, close to short-circuit condition, is equivalent to the transformer of a short circuit operation.
Described mutual inductor can use straight-through current transformer, and itself structure is not established winding one time, and current-carrying (load current) wire is by L
1to L
2through rolled circle (or other shapes) iron core rolling into by siliconized plate, play a winding effect.Be wrapped on circular iron core Secondary Winding Direct Uniform, connect and form closed-loop path with the secondary load of the current coil such as instrument, relay, transmitter, because straight-through current transformer is not established winding one time, its no-load voltage ratio is determined through the number of turn in mutual inductor iron core according to a winding, the punching number of turn is more, and no-load voltage ratio is less; Otherwise the punching number of turn is fewer, no-load voltage ratio is larger.
By this Current Transformer Secondary current/voltage of sampling, thereby calculate polarity positive and negative of its primary line passing.
The primary line input terminal of current transformer is L1, L2, and secondary line input terminal is K1, K2.Extraneous power supply accesses to secondary line input terminal K1, the K2 of current transformer after isolating transformer.
2. simulation connection terminal
Simulation connection is partly arranged on housing appearance, and its peripheral coupling part is become and formed by computing machine, controller, isolation.As shown in Figure 3: simulator primary line input terminal is masked as L1, L2, L3; Secondary line input terminal is masked as K1, K2, K3, and described six simulation terminals are directly connected with the mainboard of controller.As required, controller can be identified the state that interconnects of L1, L2, L3, K1, this six roots of sensation wiring of K2, K3.The head end of 6 wiring is respectively: 1a, and 2a ... .5a, 6a.The tail end of 6 wiring is respectively: 1b, 2b ... 5b, 6b.Namely, slave computer by controller to identify timely and accurately each end number and other 5 ends number relation (conducting or disconnection).Know method for distinguishing and adopt scan-type.
It should be noted that, it is 100/5A, 1000/5A that standard current transformer simulator can be realized simulation no-load voltage ratio value.
2. tested current transformer simulator
As shown in Figure 4, tested current transformer Simulator design principle is the same with standard current transformer simulator, and just input terminal has some difference, and primary line input terminal is masked as L1, L2; Secondary line input terminal is masked as K1, K2.
3. current loading case simulator
As shown in Figure 5, current loading case simulator comprises housing, is positioned at the some simulation connection terminals outside housing.
Simulation connection terminal is arranged on housing appearance, and power factor is 0.8 o'clock, difference fictitious load regulation stall 2.5VA, 3.75VA, 5VA, 10VA, 15VA, 20VA, and described 6 input terminals are directly connected with the mainboard of controller.As required, controller can be identified the state that interconnects of these five wiring.The head end of 6 wiring is respectively: 1a, and 2a ... .5a, 6a.The tail end of 6 wiring is respectively: 1b, 2b ... 5b, 6b.Namely, slave computer by controller to identify timely and accurately each end number and other 5 ends number relation (conducting or disconnection).Know method for distinguishing and adopt the integrated scan-type algorithm of controller MCU.
Described current loading case simulator becomes very low (generally only have about 10V) wiring voltage, can simulate overload capacity 120%, rated current: 5A, power factor is 0.8, and simulator has communication import, by computer installation load gear.
Reality simulation current loading case outward appearance, current loading case simulator outward appearance and real current load box outward appearance are in full accord, and wherein the binding post on current loading case simulator panel is also the same with real current load box.Reach the effect consistent with on-the-spot test environment.
4. current lifting device simulator
As shown in Figure 6, current lifting device simulator comprises housing, is positioned at the some simulation connection terminals outside housing.
Simulation connection terminal has 5, two input terminals be masked as 220V, ±; Three lead-out terminals are masked as 0,5V/100A, 5V/100A, and described 5 input terminals are directly connected with the mainboard of controller.As required, controller can be identified the state that interconnects of these 5 wiring.The head end of 5 wiring is respectively: 1a, and 2a ... .5a.The tail end of 5 wiring is respectively: 1b, 2b ... 5b.Namely, slave computer by controller to identify timely and accurately each end number and other 4 ends number relation (conducting or disconnection).Know method for distinguishing and adopt scan-type.
Described current lifting device simulator, under the condition of equipment appearance, function complete simulation, makes wiring voltage become very low (generally only having 10V left and right), can realize under trouble free service voltage and take an examination reliable safety guarantee is provided for the training of student's current lifting device.System also can realize simulation current lifting device punching function.The large electric current of simulation of current lifting device simulator has 0 ~ 2000A, 1000A and above punching one circle, the every circle of output 2V/.
5. mutual-inductor tester simulator
As shown in Figure 7, described mutual-inductor tester simulator comprises housing, is positioned at the circuit board of housing, is positioned at the some simulation connection terminals outside housing.
A. circuit board
Can use existing mutual-inductor tester simulator circuit board.When operating voltage (or electric current) loop of mutual-inductor tester simulator applies trial voltage (or electric current), when differential pressure (or poor stream) loop applies error voltage (or electric current), mutual-inductor tester simulator can obtain differential pressure (or poor stream) phasor with respect to in-phase component and the quadrature component of operating voltage (or electric current) phasor by electric-bridge circuit, electronic circuit or number peace circuit measuring, and voltage (or electric current) phasor that can obtain being compared by calculating and the amplitude of operating voltage (or electric current) phasor are than (ratio difference) and phase differential.If the leading operating voltage of the voltage being compared (or electric current) phasor (or electric current) phasor, phase differential, for just, lags behind as negative.The in-phase component of its phasor of mutual-inductor tester simulator and quadrature component, load value come from the value that slave computer arranges.Percentage tabular value comes from the size of pressure regulator adjusting by mutual-inductor tester simulator value.
B. simulation connection part
Simulation connection is partly arranged on housing appearance.As shown in Figure 7: operating voltage loop input terminal is masked as a, X; Working current loop input terminal is masked as To, Tx, and differential pressure input terminal is K, D; The head end of 6 wiring is respectively: 1a, and 2a ... .5a, 6a, tail end is respectively: 1b, 2b ... 5b, 6b.As required, computing machine can be identified the state that interconnects of a, X, To, Tx, K, the wiring of the D six roots of sensation by controller.Be computing machine to identify timely and accurately each end number and other 5 ends number relation (conducting or disconnection).Controller adopts scan-type, and pair of wire connection terminals scans one by one.First from 1a, recognize one by one 6a.According to communication protocol, controller is constantly uploaded to computing machine by result by RS232 interface, and the wiring point test connections such as its To, Tx, D, K, a, X show on computers to wrong information.
Mutual-inductor tester simulator is the important composition equipment of student's machine, there is outward appearance, binding post, panel of entity mutual-inductor tester etc., from sense organ, be as good as the intelligent instrument of the analogue simulation such as can realize electric current, current transformer incorrect polarity, wiring error, no-load voltage ratio mistake, error is overproof, variation is overproof with actual mutual-inductor tester.By Aluminum Alloy Chassis, circuit board, power supply, communication serial port and binding post, formed.Its peripheral coupling part is become and is formed by computing machine, controller, pressure regulator, isolation.220V external power source, after pressure regulator pressure regulation, then passes through isolating transformer, and mutual-inductor tester simulator interior power supply circuit input voltage becomes 30V.
Described mutual-inductor tester simulator is not to adopt ratio method to carry out true error verification, but adopt complete virtual mode on slave computer, to carry out the error checking of mutual inductor, the simulation test functions such as the selection of range, the computing machine connecting by RS-232 serial communication interface according to the communication protocol of agreement, the in-phase component of its phasor and quadrature component, load value derives from the value that host computer arranges, percentage tabular value derives from by the value of mutual-inductor tester simulator after adjusting pressure regulator, its ratio, angular difference, error indicating value derives from host computer the data of assignment in advance.If the more than 5% of rated operational current or voltage, error surpasses 30% and while being less than 180%, mutual-inductor tester simulator warning no-load voltage ratio mistake; If the more than 5% of rated operational current or voltage, when error is greater than 180%, mutual-inductor tester simulator warning incorrect polarity, thereby whole simulation error checking procedure keeps synchronizeing with arranging of slave computer, the training on operation of current transformer laboratory verification and examination are carried out in realization under 30V low-voltage, reach training, examination student's effect.
Described pressure regulator is connected with the power supply of mutual-inductor tester simulator by isolating transformer.
6. controller
Controller, under the management of embedded software, can be realized all electronic, the quick wiring situation of criterion current transformer simulation connection terminal, and can expand to the more interconnected relationship of multiple conducting wires, and constantly, in real time result is uploaded to slave computer.
A. the hardware of controller is realized
Figure 8 shows that controller theory diagram.Controller is comprised of a terminals driver output module, tail terminals Gather and input module, polarity and signal discrimination module, RS232 transceiver module, MCU module and power supply unit module, MCU module is connected with signal discrimination module is unidirectional with a terminals driver output module, tail terminals Gather and input module, polarity, is connected with RS232 transceiver module is two-way.Below each module is introduced:
Terminals driver output module: adopt 74HC374 or 8 latch integrated circuit.Receive the drive control signal that MCU module is sent, apply low level to wiring the end of a thread to be judged.
Tail terminals Gather and input module: adopt 75HC244 or 83 state door integrated circuit.The line tail end signal scanning that achieves a butt joint, inquiry is except the level state of unexpected other wiring tail ends of band judgement wiring one by one.
Polarity and signal discrimination module: by trsanscondutance amplifier and zero cross detection circuit, formed.The effect of trsanscondutance amplifier is that signal is fully amplified, and with the sensitivity that guarantees to detect, the effect of zero cross detection circuit is that sinusoidal wave simulating signal is become to digital signal, is convenient to MCU and processes.MCU obtains after these signals, according to certain algorithm, can judge polarity just with instead.
RS232 transceiver module: adopt SP3232 transceiver or similar integration module, the communication interface by RS232 standard by the continuous real-time Transmission of data gathering to slave computer or by the steering order communication of slave computer to corresponding simulator.
MCU module: the MPC82G 516A singlechip chip that adopts PQFP44 encapsulation.The scanning sequence that MCU module is loaded according to single-chip microcomputer is by the logic level signal of continuous scanning collection terminals tail Gather and input module, judge the break-make relation of each lead wiring terminal, MCU module is also responsible for controlling terminal stud driver output module and is specifically driven which root terminal stud simultaneously.MPC82G516 A is the single-chip microprocessor of the efficient 1-T structure based on 80C51, and every instruction needs 1 ~ 7 clock signal (than fast 6 ~ 7 times of standard 8051), compatible with 8051 instruction set.Therefore in the situation that have same processing power with standard 8051, MPC82G516A only needs low-down travelling speed, can reduce significantly power consumption thus simultaneously.
Power supply unit module: provide other each modules required working power.
B. the software of controller is realized
Fig. 9 is the software principle block diagram of this controller.Mainly be divided into 3 steps: program timing scanning and initialization, wiring state Real-time Collection, data are uploaded in real time.
Described program timing Scan Architecture and initialization step are mainly realized the timing cycle scanning of program, be convenient to realize multiple task management and synchronize accurately, have guaranteed like this reliability of data acquisition, communication.
Wiring state Real-time Collection step mainly realizes the whole Real-time Collection process that scan-type drives terminal stud, gathers all conducting of terminals tail.
It is by application layer communications protocol that real time data is uploaded step, and the wiring situation that wiring state Real-time Collection functional module is collected is converted to the data of the next function identification, and sends to slave computer.
C. controller wiring determination methods
Concrete grammar and the step of controller wiring judgement are as follows:
Step 1: after program scanning structure initialization, MCU module is sent drive control signal, by a terminals driver module, produce the end of a thread end that logic low drives a certain wire, give the end of a thread end feedback of identification with low level, and other the end of a thread ends are all presented with high level;
Step 2:MCU module adopts the mode of program scanning, scan period is less than 100ms, by tail terminals Gather and input module, inquire about one by one the level state of other wire tail ends, if the level measuring in terminal tails corresponding to tail terminals Gather and input module is low level, illustrate that this point is communicated with the end of a thread, if the level measuring is high level, illustrate that this point and the end of a thread disconnect, MCU module all gathers tail terminals Gather and input module terminals tail level state one time, judges like this break-make connection relationship of driven wire and other wires;
Step 3: by this process circulation, the wiring head end that drives fast all the other analog conducting wires of terminals driver module scan-type, when the head end of whole lines is one by one after driven completing, MCU module just can collect the break-make situation of all conducting in real time, obtains the annexation between all conducting;
Step 4:MCU module is uploaded to slave computer by RS232 transceiver module by the result of wire break-make annexation according to communication protocol after completing the collection of break-make situation of all conducting, the actual connection relationship comparison that slave computer is sent here according to the break-make relation of standard and RS232 transceiver module again, carries out wiring relation to wrong judgement.So far, whole wiring deterministic process result.From collecting, send the whole cycle that data complete, be not more than 100ms, Real-time Collection the mutual annexation of all conducting.
Below the method for work of native system is elaborated.Comprise the following step:
Step 1: host computer loading current transducer check wiring diagram interface, utilize projector projection, student is imparted knowledge to students;
Step 2: host computer loads training current transformer interface is set, creates host computer multithreading Thread, data buffer maxPacket, NetworkStream stream, for long-range transmission data are prepared; As loaded, train the success of current transformer interface is set, carry out subsequent step, otherwise return to host computer homepage;
Step 3: teacher arranges the supplemental characteristic of the current transformer of each student's machine in the current mutual-inductor parameter setting area of host computer, described parameter comprises no-load voltage ratio, polarity, load (underloading), grade, error amount;
Step 4: open first serial serialPort1 when slave computer loads training current transformer interface and be connected with actual tester, if success is carried out subsequent step, otherwise returned to slave computer homepage;
Step 5: first serial serialPort1 entrusts monitoring, the data of the actual tester of real-time sense;
Step 6: slave computer is opened second serial serialPort2 and is connected with controller, if open just slave computer homepage immediately of failure, if opened successfully, carries out the following step;
Step 7: slave computer creates multithreading Thread, data buffer maxPacket, NetworkStream stream, for long-range reception data are prepared, creates second serial serialPort2 and entrusts monitoring, the data that real-time sense controller sends;
Step 8: host computer sends to each student's machine by the supplemental characteristic of no-load voltage ratio, polarity, load (underloading), grade, error amount by NetworkStream stream, the data buffer maxPacket creating puts into buffer zone data, and the host computer multithreading Thread of establishment monitors data.
It should be noted that, if teacher finds data, mistake is set or has student not login, can click cancel button, cancel this secondary data and send.
Step 9: slave computer receives supplemental characteristic with the multithreading Thread of its establishment and display parameter show the supplemental characteristic of no-load voltage ratio wherein, load, grade, when teacher's machine sends data again, this multithreading Thread can monitor and again receive data in real time.
Step 10: slave computer training arranges the region, viewing area at current transformer interface and monitors with the trust of second serial serialPort2 the data that monitoring controller sends, int[when data are different] number2=new int[48] reception data, and with the Split(of string) method decomposition data, by analyzing data, by the mode of line, can intelligentizedly show in real time in time every single line that student connects, and can judge mistake, when wiring is correct, with black line, represent, during wiring error, with red line, represent.
Step 11: when slave computer training arranges after all wiring success of viewing area at current transformer interface, slave computer is enabled multithreading Thread, sends the data such as the no-load voltage ratio that obtains from host computer, polarity with NetworkStream stream.
Step: 12: student carries out verification to current transformer, manual adjustments pressure regulator, the data that actual tester sends according to student's machine are carried out processes and displays, and to student's machine, send the detailed data of dial gauge every bit.
Step 13: slave computer is enabled the trust of first serial serialPort1 and monitored, when listening to actual tester buffer zone and have data, slave computer array byte[] b receives data, then carry out odd even, the various ways verification modes such as packet header 0x55, bag size are carried out verification, data, verification succeeds array int[are directly abandoned in verification failure] number=new int[48] storage data, reach and receive data object.
Step: 14: decomposition data, obtain dial gauge, ratio, angular difference data, reach and show actual tester data object.
Beneficial effect of the present invention is:
The present invention adopts Computer real time simulation, the work on the spot environment that the simulation of analog current mutual inductor is examined and determine to greatest extent, provide at the standard current transformer simulator of equipment appearance, function complete simulation material object, tested current transformer simulator, current lifting device simulator, mutual-inductor tester simulator, current loading case simulator, the operating voltage of whole system and electric current are far smaller than the voltage and current of true environment, the training that can realize under trouble free service voltage, electric current as the metering of student's current transformer provides reliable safety guarantee.
Controller of the present invention meets the technical requirement of standard current transformer calibrating wiring simulation system or other similar simulation training systems completely, can realize all electronic, judge in real time, exactly the on off operating mode of simulation connection, and in time, constantly result data is uploaded to slave computer and does wiring misinterpretation etc. is further processed.
Slave computer can carry out test connection judgement to the simulation connection connection terminal of each simulator, and actual tests wiring situation can be shown on computers, excite to greatest extent student to the comprehension of work on the spot and actual operational capacity, improve rapidly student's operative skill, there is stronger production practical significance.
Claims (10)
1. a Simulation of current transformer training system, is characterized in that, the student's machine that comprises teacher's machine, the communication connection of some and teacher's machine, wherein,
Teacher's machine comprises that host computer, the projector equipment being connected with host computer, current transformer detect entity platform; Described host computer is for controlling the communication of whole system, and the slave computer parameter that realizes student's machine issues, current transformer training function; Described current transformer detects entity platform and comprises actual current lifting device, actual standard current transformer, actual tested current transformer, actual current Burden box, actual tester, actual pressure regulator;
Described student's machine comprise slave computer, with controller, pressure regulator, standard current transformer simulator, tested current transformer simulator, current lifting device simulator, mutual-inductor tester simulator, the current loading case simulator of slave computer communication connection, described each simulator is all connected with controller, wherein
Described current loading case simulator is for current loading case simulator that is virtually reality like reality;
Described standard current transformer simulator is for standard current transformer simulator function that is virtually reality like reality;
Described tested current transformer simulator is for the function of tested current transformer that is virtually reality like reality;
Described current lifting device simulator is for the function of current lifting device that is virtually reality like reality;
Described mutual-inductor tester simulator is for the function of mutual-inductor tester that is virtually reality like reality;
Described each simulator all has some simulation connection terminals, and described simulation connection terminal is for simulating the connection terminal function of entity;
Pressure regulator is connected with mutual-inductor tester simulator power unit by isolating transformer;
Controller is used for the signals collecting of the simulation connection terminal connections situation of each simulator, and is uploaded to its corresponding slave computer, and carries out the steering order that slave computer sends;
Slave computer is for uploading information, receive the parameter that host computer is set each simulator controller sending controling instruction information, reception controller, and carry out signal disposal and analysis, actual tests wiring situation when arranging on current transformer interface, is shown in the training of slave computer.
2. Simulation of current transformer training system as described in claim 1, it is characterized in that, described controller comprises a terminals driver output module, tail terminals Gather and input module, polarity and signal discrimination module, RS232 transceiver module, MCU module and power supply unit module; MCU module is connected with signal discrimination module is unidirectional with a terminals driver output module, tail terminals Gather and input module, polarity, is connected with RS232 transceiver module is two-way.Wherein,
Terminals driver output module, for receiving the drive control signal that MCU module is sent, applies low level to wiring the end of a thread to be judged;
The tail terminals Gather and input module line tail end signal scanning that is used for achieving a butt joint, inquiry is except the level state of unexpected other wiring tail ends of band judgement wiring one by one;
Polarity and signal discrimination module are used for realizing the amplification of signal, and realize the analog to digital conversion of signal;
RS232 transceiver module for the signal of tail terminals Gather and input module is transferred to host computer or by the steering order communication of host computer to corresponding simulator;
MCU module is used for control head terminals driver output module drive terminal stud to be judged, and constantly scans the logic level signal of tail terminals Gather and input module, judges the break-make relation of wiring between each simulation connection terminal;
Power supply unit module is used for to other each module for power supply.
3. Simulation of current transformer training system as claimed in claim 1 or 2, it is characterized in that, described host computer is provided with training current transformer interface is set, and described interface is divided into current mutual-inductor parameter setting area, current transformer nameplate viewing area, current transformer data area;
Described current mutual-inductor parameter viewing area can arrange the supplemental characteristic of the current transformer of each student's machine, and described parameter comprises no-load voltage ratio, polarity, load, grade, error;
Described current transformer nameplate viewing area, for showing in real time the setting value of parameters;
Current transformer data area shows fully loaded and underloading data in time in real time according to the setting value of parameters;
Described host computer is also provided with current transformer verification wiring diagram interface;
Described slave computer is provided with training current transformer interface is set, and described interface is divided into current transformer connection graph region, monitors area, current transformer nameplate region;
Described current transformer connection graph region shows the not wired wiring diagram of current transformer, and the connection layout after wiring, when student's wiring is correct, with black line, represents, during wiring error, with red line, represents;
Described supervision area is partly followed ratio difference, the angular difference that actual tester samples drawn and is partly followed the angular difference value that actual tester is sampled drawn for showing percentage tabular value, ratio that dial gauge is partly followed actual tester and sampled drawn;
The data value of the no-load voltage ratio that described current transformer nameplate viewing area demonstration teacher arranges, load, grade.
4. Simulation of current transformer training system as claimed in claim 1, is characterized in that, described student's machine has six.
5. the method for work of the Simulation of current transformer training system as described in any one in claim 1 ~ 4, is characterized in that, comprises the following step:
Step 1: host computer loading current transducer check wiring diagram interface, utilize projector projection, student is imparted knowledge to students;
Step 2: host computer loads training current transformer interface is set, creates host computer multithreading Thread, data buffer maxPacket, NetworkStream stream, for long-range transmission data are prepared; As loaded, train the success of current transformer interface is set, carry out subsequent step, otherwise return to host computer homepage;
Step 3: teacher arranges the supplemental characteristic of the current transformer of each student's machine in the current mutual-inductor parameter setting area of host computer;
Step 4: open first serial when slave computer loads training current transformer interface and be connected with actual tester, if success is carried out subsequent step, otherwise returned to slave computer homepage;
Step 5: first serial is entrusted and monitored, the data of the actual tester of real-time sense;
Step 6: slave computer is opened second serial and is connected with controller, if open just slave computer homepage immediately of failure, if opened successfully, carries out the following step;
Step 7: slave computer creates multithreading Thread, data buffer maxPacket, NetworkStream stream, for long-range reception data are prepared, creates second serial and entrusts monitoring, the data that real-time sense controller sends;
Step 8: host computer sends to each student's machine by supplemental characteristic by NetworkStream stream, the host computer multithreading Thread of establishment monitors data;
Step 9: slave computer receives and display parameter data supplemental characteristic with the multithreading Thread of its establishment, and when teacher's machine sends data again, this multithreading Thread can monitor and again receive data in real time;
Step 10: slave computer training arranges the region, viewing area at current transformer interface and monitors with the trust of second serial the data that monitoring controller sends, int[when data are different] number2=new int[48] reception data, and with the Split(of string) method decomposition data, by analyzing data, by the mode of line, show in real time every single line that each simulator connects;
Step 11: when slave computer training arranges after all wiring success of viewing area at current transformer interface, slave computer is enabled multithreading Thread, sends with NetworkStream stream the supplemental characteristic obtaining from host computer;
Step: 12: student carries out verification to current transformer, manual adjustments pressure regulator, the data that actual tester sends according to student's machine are carried out processes and displays, and to student's machine, send the detailed data of dial gauge every bit;
Step 13: slave computer is enabled the trust of first serial and monitored, when listening to actual tester buffer zone and have data, slave computer receives data, carries out verification, and data are directly abandoned in verification failure, and verification succeeds is storage data, reaches and receives data object;
Step: 14: decomposition data, obtain dial gauge, ratio, angular difference data, reach and show actual tester data object.
6. the method for work of Simulation of current transformer training system as claimed in claim 5, it is characterized in that, in step 13, slave computer is taked odd even to the data that receive, packet header 0x55, wrap big or small verification mode, verification succeeds array int[] number=new int[48] storage data.
7. the method for work of Simulation of current transformer training system as claimed in claim 5, is characterized in that, in step 9, described slave computer shows the data of no-load voltage ratio, load, three parameters of grade.
8. the method for work of Simulation of current transformer training system as claimed in claim 5, it is characterized in that, in step 3, after all supplemental characteristics are all set, data after the current transformer data area display setting at the loading training current transformer interface of host computer, otherwise do not show.
9. the method for work of Simulation of current transformer training system as claimed in claim 5, it is characterized in that, when slave computer listens to data buffer maxPacket variation, slave computer receives data again, storage data, decomposition data, upgrades dial gauge, angular difference, than difference data, reaches the dial gauge that upgrades in time in real time, angular difference, than difference data object.
10. the method for work of Simulation of current transformer training system as claimed in claim 5, it is characterized in that, in step 10, slave computer training arranges in the region, viewing area at current transformer interface, when each simulator wiring is correct, with black line, represent, during wiring error, with red line, represent.
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