Этот пример показывает использование MATLAB с IVI драйверами, чтобы соединиться с, сконфигурировать и измерить напряжение переменного тока с помощью источника питания Keysight Technologies AC6801A и вывести результат в MATLAB®.
Этот пример требует, чтобы следующее было установлено на компьютере:
Версия 17.1 библиотек Keysight IO или более новый
Источники питания переменного тока Keysight AC6800 IVI версий 1.0.3.0 или более новый
Это перечисляет IVI драйверов, которые были установлены на компьютере.
IviInfo = instrhwinfo('ivi');
IviInfo.Modules
ans = Columns 1 through 6 'Ag33220' 'Ag3352x' 'Ag34410' 'Ag34970' 'Ag532xx' 'AgAC6800' Columns 7 through 11 'AgE36xx' 'AgInfiniiVision' 'AgMD1' 'AgRfSigGen' 'AgXSAn' Columns 12 through 13 'KtRFPowerMeter' 'rsspecan'
% Create the MATLAB instrument driver makemid('AgAC6800','AgAC6800.mdd') % Use icdevice with the MATLAB instrument driver name and instrument's % resource name to create a device object. In this example the instrument % is connected by GPIB at board index 0 and primary address 1. myInstrument = icdevice('AgAC6800.mdd', 'GPIB0::01::INSTR','optionstring','simulate=true'); % Connect driver instance connect(myInstrument);
% Attributes Definition. These values are defined in the driver's header file, 'AgAC6800.h' IVI_ATTR_BASE= 1000000; IVI_SPECIFIC_ATTR_BASE = IVI_ATTR_BASE + 150000; AGAC6800_ATTR_OUTPUT_PHASE_VOLTAGE_SOFT_LIMIT_ENABLED = IVI_SPECIFIC_ATTR_BASE + 15; AGAC6800_VAL_MODE_AC_DC = 2; AGAC6800_ATTR_PROTECTION_CURRENT_PROTECTION_ENABLED = IVI_SPECIFIC_ATTR_BASE + 37; AGAC6800_VAL_MEASUREMENT_TYPE_VOLTAGERMS = 0; AGAC6800_VAL_MEASUREMENT_TYPE_CURRENTRMS = 1; AGAC6800_VAL_MEASUREMENT_TYPE_VOLTAGEDC = 3; AGAC6800_VAL_MEASUREMENT_TYPE_CURRENTDC = 4; AGAC6800_VAL_MEASUREMENT_TYPE_POWER_FACTOR = 5; AGAC6800_VAL_MEASUREMENT_TYPE_CREST_FACTOR = 6; AGAC6800_VAL_MEASUREMENT_TYPE_CURRENT_PEAK = 7; AGAC6800_VAL_MEASUREMENT_TYPE_POWERVA = 8; AGAC6800_VAL_MEASUREMENT_TYPE_POWERDC = 9; AGAC6800_VAL_MEASUREMENT_TYPE_POWER_REACTIVE = 12; AGAC6800_VAL_MEASUREMENT_TYPE_VOLTAGEACDC = 13; AGAC6800_VAL_MEASUREMENT_TYPE_CURRENTACDC = 14; AGAC6800_VAL_MEASUREMENT_TYPE_POWER_REAL = 19; AGAC6800_VAL_MEASUREMENT_TYPE_POWER_REALACDC = 15; AGAC6800_VAL_MEASUREMENT_TYPE_POWERVAACDC = 16; AGAC6800_VAL_MEASUREMENT_TYPE_POWER_REACTIVEACDC = 17; AGAC6800_VAL_MEASUREMENT_TYPE_POWER_FACTORACDC = 18; % Variables Definition. These values are being passed to the driver. AcVolts = 120; AcAmps = 4; Freq = 50; LoVolt = 0.9 * AcVolts; HiVolt = 1.1 * AcVolts; DcVolts = 5; DcAmps = 1;
Запросите информацию о драйвере и инструменте
AttributeAccessors = get(myInstrument, 'Attributeaccessors'); DriverIdentification = get(myInstrument,'Inherentiviattributesdriveridentification'); DCGeneration = get(myInstrument,'Dcgeneration'); InstrumentIdentification = get(myInstrument,'Inherentiviattributesinstrumentidentification'); InstrumentModel = get(InstrumentIdentification, 'Instrument_Model'); InstrumentSpecificMeasurement = get(myInstrument, 'Instrumentspecificmeasurement'); InstrumentSpecificOutputPhaseCurrent = get(myInstrument,'Instrumentspecificoutputphasecurrent'); InstrumentSpecificOutputPhaseFrequency = get(myInstrument, 'Instrumentspecificoutputphasefrequency'); InstrumentSpecificOutputPhaseVoltage = get(myInstrument,'Instrumentspecificoutputphasevoltage'); InstrumentSpecificOutputPhaseVoltageSoftLimit = get(myInstrument,'Instrumentspecificoutputphasevoltagesoftlimit'); InstrumentSpecificSystem = get(myInstrument, 'Instrumentspecificsystem'); Output = get(myInstrument,'Output'); Outputs = get(myInstrument,'Outputs'); Utility = get(myInstrument, 'Utility'); Revision = invoke(Utility, 'revisionquery'); Vendor = get(DriverIdentification, 'Specific_Driver_Vendor'); Description = get(DriverIdentification, 'Specific_Driver_Description'); FirmwareRev = get(InstrumentIdentification, 'Instrument_Firmware_Revision'); % Print the queried driver properties fprintf('Revision: %s\n', Revision); fprintf('Vendor: %s\n', Vendor); fprintf('Description: %s\n', Description); fprintf('InstrumentModel: %s\n', InstrumentModel); fprintf('FirmwareRev: %s\n', FirmwareRev); fprintf(' \n');
Revision: 1.0.3.0 Vendor: Agilent Technologies Description: IVI Driver for AC68xx family of Power Supplies [Compiled for 64-bit.] InstrumentModel: AC6801A FirmwareRev: Sim1.0.3.0
% Enable the voltage auto range so that the maximum current will be % supplied for the voltage setting set(InstrumentSpecificOutputPhaseVoltage, 'Auto_Range', true); % Set voltage level to 120 V set(Output, 'Voltage_Level', AcVolts); % Set output phase current limit to 4 A invoke(Output, 'configurecurrentlimit', 'OutputPhase1',AcAmps); % Set output phase frequency level to 50 Hz invoke(Outputs, 'configurefrequency', 50);
Источники переменного тока также позволяют вам устанавливать некоторые функции защиты. Первый является мягкими пределами. В данном примере пределы будут +/-10%.
% Set output phase voltage soft limit lower limit to 108 V set(InstrumentSpecificOutputPhaseVoltageSoftLimit, 'Lower_Limit', LoVolt); % Set output phase voltage soft limit upper limit to 132 V set(InstrumentSpecificOutputPhaseVoltageSoftLimit, 'Upper_Limit', HiVolt); % Enable the output phase voltage soft limit invoke(AttributeAccessors, 'setattributeviboolean', 'OutputPhase1', AGAC6800_ATTR_OUTPUT_PHASE_VOLTAGE_SOFT_LIMIT_ENABLED, 1);
% Set output voltage generation mode to AC Plus DC. Set the DC voltage level to 5 V invoke(DCGeneration, 'configuredc', 'OutputPhase1',AGAC6800_VAL_MODE_AC_DC,DcVolts); % Set the output phase current DC limit to 1 A set(InstrumentSpecificOutputPhaseCurrent, 'Dc_Limit', DcAmps);
Существует также текущая защита, чтобы включить. Инструмент войдет, защищают, когда он поражает текущий предел
% Enable the current protection invoke(AttributeAccessors, 'setattributeviboolean', '', AGAC6800_ATTR_PROTECTION_CURRENT_PROTECTION_ENABLED, 1); % Enable output set(Output, 'Enabled', 1); % Wait for operation to complete. invoke(InstrumentSpecificSystem, 'systemwaitforoperationcomplete', 1000); % Wait for 1000ms maximum
Источник переменного тока может взять набор измерений. Если вы делаете один, можно выбрать остальных от того же приобретения
fprintf('Voltage Measurements\n'); VoltAC = invoke(InstrumentSpecificMeasurement, 'measurementmeasure', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_VOLTAGERMS); fprintf('Measured AC Voltage %0.15g V\n', VoltAC); VoltDC = invoke(InstrumentSpecificMeasurement, 'measurementfetch', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_VOLTAGEDC); fprintf('Fetched DC Voltage = %0.15g V\n', VoltDC); VoltACDC = invoke(InstrumentSpecificMeasurement, 'measurementfetch', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_VOLTAGEACDC); fprintf('Fetched AC+DC Voltage = %0.15g V rms\n', VoltACDC);
Voltage Measurements Measured AC Voltage 0 V Fetched DC Voltage = 0 V Fetched AC+DC Voltage = 0 V rms
fprintf('\nCurrent Measurements\n'); CurrAC = invoke(InstrumentSpecificMeasurement, 'measurementfetch', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_CURRENTRMS); fprintf('Fetched AC Current = %0.15g A rms\n', CurrAC); CurrDC = invoke(InstrumentSpecificMeasurement, 'measurementfetch', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_CURRENTDC); fprintf('Fetched DC Current = %0.15g A\n', CurrDC); CurrACDC = invoke(InstrumentSpecificMeasurement, 'measurementfetch', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_CURRENTACDC); fprintf('Fetched AC+DC Current = %0.15g A rms\n', CurrACDC); PeakCurr = invoke(InstrumentSpecificMeasurement, 'measurementfetch', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_CURRENT_PEAK); fprintf('Fetched Peak Current = %0.15g A\n', PeakCurr); CresFact = invoke(InstrumentSpecificMeasurement, 'measurementfetch', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_CREST_FACTOR); fprintf('Fetched Crest Factor = %0.15g\n', CresFact);
Current Measurements Fetched AC Current = 0 A rms Fetched DC Current = 0 A Fetched AC+DC Current = 0 A rms Fetched Peak Current = 0 A Fetched Crest Factor = 0
fprintf('\nPower Measurements\n'); RealPow = invoke(InstrumentSpecificMeasurement, 'measurementfetch', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_POWER_REAL); fprintf('Fetched AC Real Power = %0.15g W\n', RealPow); ApparPow = invoke(InstrumentSpecificMeasurement, 'measurementfetch', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_POWERVA); fprintf('Fetched AC Apparent Power = %0.15g VA\n', ApparPow); ReactPow = invoke(InstrumentSpecificMeasurement, 'measurementfetch', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_POWER_REACTIVE); fprintf('Fetched AC Reactive Power = %0.15g VAR\n', ReactPow); DCPow = invoke(InstrumentSpecificMeasurement, 'measurementfetch', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_POWERDC); fprintf('Fetched DC Power = %0.15g W\n', DCPow); PowFact = invoke(InstrumentSpecificMeasurement, 'measurementfetch', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_POWER_FACTOR); fprintf('Fetched Power Factor = %0.15g\n', PowFact); RealPowACDC = invoke(InstrumentSpecificMeasurement, 'measurementfetch', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_POWER_REALACDC); fprintf('Fetched AC+DC Real Power = %0.15g W\n', RealPowACDC); ApparPowACDC = invoke(InstrumentSpecificMeasurement, 'measurementfetch', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_POWERVAACDC); fprintf('Fetched AC+DC Apparent Power = %0.15g VA\n', ApparPowACDC); ReactPowACDC = invoke(InstrumentSpecificMeasurement, 'measurementfetch', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_POWER_REACTIVEACDC); fprintf('Fetched AC+DC Reactive Power = %0.15g VAR\n', ReactPowACDC); PowFactACDC = invoke(InstrumentSpecificMeasurement, 'measurementfetch', 'Measurement1', AGAC6800_VAL_MEASUREMENT_TYPE_POWER_FACTORACDC); fprintf('Fetched AC+DC Power Factor = %0.15g\n', PowFactACDC); fprintf('\n');
Power Measurements Fetched AC Real Power = 0 W Fetched AC Apparent Power = 0 VA Fetched AC Reactive Power = 0 VAR Fetched DC Power = 0 W Fetched Power Factor = 0 Fetched AC+DC Real Power = 0 W Fetched AC+DC Apparent Power = 0 VA Fetched AC+DC Reactive Power = 0 VAR Fetched AC+DC Power Factor = 0
% If there are any errors, query the driver to retrieve and display them. ErrorNum = 1; while (ErrorNum ~= 0) [ErrorNum, ErrorMsg] = invoke(Utility, 'errorquery'); fprintf('ErrorQuery: %d, %s\n', ErrorNum, ErrorMsg); end
ErrorQuery: 0, No error.
disconnect(myInstrument);
% Remove instrument objects from memory.
delete(myInstrument);
Этот пример показывает установку выходного напряжения, и сделайте измерения мощности из источника питания с помощью IVI драйверов. Если измеренные данные о степени получены от инструмента, MATLAB может использоваться, чтобы визуализировать и выполнить исследования данных, пользующихся богатой библиотекой функций в Signal Processing Toolbox™ и Системах связи Toolbox™. Используя Instrument Control Toolbox™, возможно автоматизировать управление инструментов, и, создать системы тестирования, которые используют MATLAB, чтобы выполнить исследования, которые не могут быть возможным использованием встроенной возможности оборудования.