CN103778828A - Transformer calibrator simulator - Google Patents
Transformer calibrator simulator Download PDFInfo
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- CN103778828A CN103778828A CN201410009672.9A CN201410009672A CN103778828A CN 103778828 A CN103778828 A CN 103778828A CN 201410009672 A CN201410009672 A CN 201410009672A CN 103778828 A CN103778828 A CN 103778828A
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Abstract
The invention provides a transformer calibrator simulator which includes an upper computer, a control machine, a shell, a circuit board disposed in the shell, and a plurality of simulation wiring terminals disposed outside the shell, wherein the upper computer and the control machine are connected in a communication mode, and the control machine is connected with the simulation wiring terminals. According to the voltage load box simulator, real-time simulation is carried out by the use of a computer to simulate the on-site working condition to the greatest extent, and under the condition that the appearance and functions of equipment are completely simulative, the input and output voltages are small, and reliable security guarantee can be provided for students in transformer calibrator training examination under safe working voltage.
Description
Technical field
The present invention relates to electric energy mutual-inductor field, relate in particular to a kind of mutual-inductor tester simulator.
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, affect normal testing, mainly because training set lags behind, be with first-class training method mainly with concentration theory training, lecture experiment, written exam and with on-the-spot one at present, all have significant limitation, training efficiency is very low.
And 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, limit quality and the efficiency of training.
Can under the condition of low pressure, little electric current, operate if can provide a kind of, and function and complete mutual-inductor tester that is virtually reality like reality in appearance, so, the safe operation during to this equipment of 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 mutual-inductor tester simulator, comprise host computer, controller, housing, be positioned at housing circuit board, be positioned at some simulation connections terminal part of housing outside; Described host computer and controller communication connection, controller is connected with described some simulation connection terminals; Wherein
Simulation connection terminal is for simulating the input terminal of mutual-inductor tester;
Controller is used for the collection to each simulation connection terminal signals wiring situation, and is uploaded to host computer;
Host computer is for uploading information, and whether line is correctly judged, shows in real time each simulation connection terminal line situation controller sending controling instruction information, the parameter of setting described simulator, reception controller.
Further, described simulation connection terminal part comprises two operating voltage loop input terminals, two working current loop input terminals, two differential pressure input terminals.
Further, the parameter of described mutual-inductor tester simulator comprises the in-phase component of phasor and quadrature component, load value, ratio, angular difference, error indicating value.
Further, the mutual-inductor tester simulation page setup of host computer has wiring situation viewing area, the data that monitoring controller sends are monitored with entrusting in region, described wiring situation viewing area, with the Split(of string) method decomposition data, and with according to the break-make Relationship Comparison of standard, show in real time the every single line connecing.
Further, 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 judge the wiring level state of other wiring tail ends unexpectedly except band 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 controller;
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.
Further, described terminals driver output module adopts 74HC374 or 8 latch integrated circuit; Described terminals driver output module adopts 74HC374 or 8 latch integrated circuit; Described polarity and signal discrimination module are made up of trsanscondutance amplifier and zero cross detection circuit; Described RS232 transceiver module SP3232 transceiver; Described MCU module adopts the MPC82G 516A singlechip chip of PQFP44 encapsulation.
Further, described host computer is connected by serial ports with controller.
Beneficial effect of the present invention is:
The present invention adopts Computer real time simulation, simulated field working environment to greatest extent, under the condition of equipment appearance, function complete simulation, input and output voltage is little, can realize under trouble free service voltage and to provide the training of the mutual-inductor tester reliable safety guarantee of taking an examination for student.
Controller of the present invention meets the technical requirement of mutual-inductor tester 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 host computer and does wiring misinterpretation etc. is further processed.
Host computer can be by wiring point test connection judgements (actual tests wiring situation can be shown on computers) such as the simulation connection part connection terminal To of housing, Tx, D, K, a, X, excite to greatest extent comprehension and the actual operational capacity of student to work on the spot, improve rapidly student's operative skill, there is stronger production practical significance.
accompanying drawing explanation:
Fig. 1 is principle of the invention block diagram.
Fig. 2 is controller principle module map.
Fig. 3 is the software principle block diagram of controller.
embodiment:
The present invention includes as host computer (being generally computing machine), controller, housing, be positioned at the circuit board of housing, be positioned at the some simulation connection terminals outside housing.
As shown in Figure 1: host computer is connected by RS232 serial ports with controller, each connection terminal is connected with the connector socket of controller mainboard, described housing mutual-inductor tester shell that is virtually reality like reality, and housing the inside is provided with mutual-inductor tester.
Describe in detail respectively below.
1. circuit board
Can use existing mutual-inductor tester circuit board.When operating voltage (or electric current) loop of tester applies trial voltage (or electric current), when differential pressure (or poor stream) loop applies error voltage (or electric current), tester can obtain in-phase component and the quadrature component of differential pressure (or poor stream) phasor with respect to 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 host computer arranges.Percentage tabular value comes from the size of pressure regulator adjusting by mutual-inductor tester simulator value.
2. simulation connection part
Simulation connection part is arranged on housing appearance.As shown in fig. 1: 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.
3. controller
Controller, under the management of embedded software, can be realized all electronic, judges fast the wiring situation of mutual-inductor tester simulation connection terminal, and can expand to the more interconnected relationship of multiple conducting wires, and constantly, in real time result is uploaded to host computer.
A. the hardware of controller is realized
Figure 2 shows that controller theory diagram.Controller is made up 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 judge the wiring level state of other wiring tail ends unexpectedly except band one by one.
Polarity and signal discrimination module: formed by trsanscondutance amplifier and zero cross detection circuit.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 host computer or by the steering order communication of host computer to controller.
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), with 8051 instruction set compatibilities.Therefore in the case of having same processing power with standard 8051, MPC82G516A only needs low-down travelling speed, can reduce significantly thus power consumption simultaneously.
Power supply unit module: provide other each modules required working power.
B. the software of controller is realized
Fig. 3 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 upper function identification, and sends to host 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, produce the end of a thread end of a certain wire of logic low driving by a terminals driver module, present with low level to the end of a thread end of identification, 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 that is 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, after the head end of whole lines is completed by driving one by one, 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 host 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 host 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.Send whole cycle of completing of data from collecting, be not more than 100ms, Real-time Collection the mutual annexation of all conducting.
4. host computer
Described host computer can be used in the parameter of setting mutual-inductor tester simulator, as comprises the in-phase component of phasor and quadrature component, load value, ratio, angular difference, error indicating value, and has region, viewing area display standard circuit diagram mutual inductor interstar connection figure.6 connection terminals of display simulation wiring part in wiring diagram, when operating personnel carry out after line terminal, even if meeting shows on viewing area.
The job step of host computer is:
1. host computer loads the mutual-inductor tester simulation page, and operating personnel set no-load voltage ratio, the parameters such as rated power factor, nominal load, rated frequency, accuracy grade.
2. the data that monitoring controller sends are monitored with entrusting in region, viewing area, and with the Split(of string) method decomposition data, can intelligentized every single line that real-time demonstration student connects in time by the mode of analyzing data line,
3. the actual connection relationship comparison that host computer is sent here according to the break-make relation of standard and RS232 transceiver module, carries out wiring relation to wrong judgement.What wiring was correct represents with black line, and the red line of use of wiring error represents.
In use, its periphery is connected with pressure regulator and isolating transformer in the present invention, and described pressure regulator is connected with power unit of the present invention by isolating transformer.
In use, pressure regulator is connected with mutual-inductor tester simulator power unit by isolating transformer in the present invention.Described mutual-inductor tester simulator is not to adopt ratio method to carry out true error verification, but adopt complete virtual mode on host 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 exceedes 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 host computer, realize and under 30V low-voltage, carry out the training on operation of current transformer laboratory verification and examination, reach training, examination student's effect.
Beneficial effect of the present invention is:
The present invention adopts Computer real time simulation, simulated field working environment to greatest extent, under the condition of equipment appearance, function complete simulation, make wiring voltage become very low (generally only having 10V left and right), the test of simulation secondary circuit, mutual-inductor tester simulator is not needed with the whole secondary circuit of ratio method authentic testing, as long as by RS-232 serial ports connection computing machine, obtain ratio, angular difference value from computing machine by the communications protocol of agreement.For student provides the training of the mutual-inductor tester reliable safety guarantee of taking an examination.
Simulation dial gauge, in order to make mutual-inductor tester simulator checking procedure reach more vivid effect, in whole checking procedure the value of dial gauge depend on student's manual adjustments pressure regulator number, reach mutual-inductor tester simulator dial gauge and synchronize with pressure regulator.
There is the outward appearance of actual mutual-inductor tester, be as good as from sense organ and actual mutual-inductor tester.Its ratio, angular difference, error indicating value can be by host computer assignment.There is the measurement function of routine transformer tester, the selector switch of range, can use complete virtual mode on the sub-computing machine of device, to carry out the selection of tester measurement function, range.
Controller of the present invention meets the technical requirement of mutual-inductor tester 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 host computer and does wiring misinterpretation etc. is further processed.
Host computer can be by wiring point test connection judgements (actual tests wiring situation can be shown on computers) such as the simulation connection part connection terminal a of housing, X, To, Tx, K, D, excite to greatest extent comprehension and the actual operational capacity of student to work on the spot, improve rapidly student's operative skill, there is stronger production practical significance.
Scm software is take assembly language as exploitation programming language, communication protocol adopts stipulated form to write, and separates with master routine, convenient expansion and modification, function completes and adopts Modular spliced to form to search easily, and travelling speed is fast, reliability is strong, strong interference immunity, code error rate are low.
Claims (7)
1. mutual-inductor tester simulator, is characterized in that, comprise host computer, controller, housing, be positioned at housing circuit board, be positioned at some simulation connection terminals of housing outside; Described host computer and controller communication connection, controller is connected with described some simulation connection terminals; Wherein
Simulation connection terminal is for simulating the input terminal of mutual-inductor tester;
Controller is used for the collection to each simulation connection terminal signals wiring situation, and is uploaded to host computer;
Host computer is for uploading information, and whether line is correctly judged, shows in real time each simulation connection terminal line situation controller sending controling instruction information, the parameter of setting described simulator, reception controller.
2. mutual-inductor tester simulator as claimed in claim 1, is characterized in that, described simulation connection terminal part comprises two operating voltage loop input terminals, two working current loop input terminals, two differential pressure input terminals.
3. mutual-inductor tester simulator as claimed in claim 1, is characterized in that, the parameter of described mutual-inductor tester simulator comprises the in-phase component of phasor and quadrature component, load value, ratio, angular difference, error indicating value.
4. mutual-inductor tester simulator as claimed in claim 1, it is characterized in that, the mutual-inductor tester simulation page setup of host computer has wiring situation viewing area, the data that monitoring controller sends are monitored with entrusting in region, described wiring situation viewing area, with the Split(of string) method decomposition data, and with according to the break-make Relationship Comparison of standard, show in real time the every single line connecing.
5. the mutual-inductor tester simulator as described in any one in claim 1～4, 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 judge the wiring level state of other wiring tail ends unexpectedly except band 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 controller;
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.
6. mutual-inductor tester simulator as claimed in claim 5, is characterized in that, described terminals driver output module adopts 74HC374 or 8 latch integrated circuit; Described terminals driver output module adopts 74HC374 or 8 latch integrated circuit; Described polarity and signal discrimination module are made up of trsanscondutance amplifier and zero cross detection circuit; Described RS232 transceiver module SP3232 transceiver; Described MCU module adopts the MPC82G 516A singlechip chip of PQFP44 encapsulation.
7. mutual-inductor tester simulator as claimed in claim 1, is characterized in that, described host computer is connected by serial ports with controller.
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| CN201410009672.9A CN103778828A (en) | 2014-01-09 | 2014-01-09 | Transformer calibrator simulator |
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| CN201410009672.9A CN103778828A (en) | 2014-01-09 | 2014-01-09 | Transformer calibrator simulator |
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Cited By (1)
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| CN108267706A (en) * | 2017-07-26 | 2018-07-10 | 卢嘉栋 | A kind of ct calibrating wiring judges Training Methodology in advance |
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| CN201638439U (en) * | 2010-04-15 | 2010-11-17 | 秦皇岛开发区海纳电测仪器有限责任公司 | Full-metering simulation device |
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Application publication date: 20140507 |