Python使用 Pyvisa库 控制 NI 设备Fluke 6105A

import enumimport hashlibimport timeimport pyvisaclass Fluke():	# region fluke initial    @classmethod	def _open_signal_analyzer_connection(cls, ipAddress):		ipAddress = str(ipAddress)		resourceName = 'TCPIP0::{:s}::inst0::INSTR'.format(ipAddress)		connectionID = cls.get_connectionID(resourceName)		if connectionID not in cls._connections:			cls._connections[connectionID] = cls._sigAnalyzer_connection(resourceName)		cls._active_connection = connectionID		print('Connect to SA successful')		return (connectionID, cls._connections[connectionID])	@classmethod	def _close_signal_analyzer_connection(cls, connectionID=None):		connectionID = cls._check_connectionID(connectionID)		try:			cls._connections[connectionID].close()		except SignalError as err:			print('{!s}'.format(err))		del cls._connections[connectionID]		cls._active_connection = None if not cls._connections else next(iter(cls._connections.keys()))		print('Disconnected with SA')		return (cls._active_connection, cls._connections[cls._active_connection] if cls._active_connection else None)

	def send_raw_command(self, command, *args): # 很主要很核心的一个函数，用来向设备发送各种命令		if not command:			raise ValueError('Command string is empty')		try:			execStatus = self.inst.write(command)			return execStatus		except:			self._fluke_disconnection()			raise IOError('Send command ({:s}) to fluke is failed.'.format(command))

def _generic_harmonic_output(self, outputType, phase_id, frequency=None, phi=None, amp=None, h=None, net=1, enableChannel=1):		'''		用来生成谐波信号的一个底层函数，后面会被其他函数调用，以此来实现电压，电流 等信号的输出		'''		outputType = str(outputType).upper()[:4]		phase_id = int(phase_id)		frequency = float(frequency) if frequency is not None else frequency		phi = int(phi) if phi is not None else phi		amp = float(amp) if amp is not None else amp		net = int(net)		enableChannel = int(enableChannel)		ampRange = self._fluke_get_output_range(outputType, amp)		if outputType not in ['VOLT', 'CURR']:			raise ValueError('Invalid output type "{:s}"'.format(outputType))		if phi < -180 or phi > 180:			raise ValueError('Invalid angle of {:f}; must be in the range of (-180, 180)'.format(phi))		harmParameters = []		h_string = []		if frequency is not None:			harmParameters.append(':FREQ {:f}'.format(frequency))		if amp is not None:			harmParameters.append(':PHAS{:d}:{:s}:RANG {:f},{:f}'.format(phase_id, outputType, ampRange[0], ampRange[1]))		if enableChannel is not None:			harmParameters.append('STAT {:d}'.format(enableChannel))		if phi is not None and amp is not None:			h_string.append('HARM1 {:f},{:f}'.format(amp, phi))		if h is not None:			harmParameters.append('MHAR:STAT ON')			if self._get_dimensions(h) != 2:				raise AssertionError('The {} is not a two-dimensional array, it should be like:[[2,0,0],[3,0,0]] '.format(h))			for h_x in h:				h_order = int(h_x[0])				h_amp = float(h_x[1])				h_angle = float(h_x[2])				if h_order < 2:					raise ValueError(						'Invalid harmonic order of {:d}; must be greater than or equal to 2'.format(h_order))				if h_amp < 0 or h_amp > frequency:					raise ValueError(						'Invalid harmonic Amplitude of {:f}; must be in the range of [0, {}]'.format(frequency, h_amp))				if h_angle < -180 or h_angle > 180:					raise ValueError(						'Invalid harmonic angle of {:f}; must be in the range of [-180, 180]'.format(h_angle))				h_string.append('HARM{:d} {:f},{:f}'.format(h_order, h_amp, h_angle))		else:			harmParameters.append('MHAR:STAT OFF')		if len(harmParameters) > 1:			self.send_raw_command('{:s};{:s}'.format(';'.join(harmParameters), ';'.join(h_string)))		else:			print('No command sent, no parameter was set')

# region Voltage Output	def _set_harmonic_phase_voltage_output(self, phase_id, frequency, phi=0, u=0, mu=1, h=None, net=1):# 设置某一相位的谐波电压输出		self._generic_harmonic_output(outputType='VOLTAGE', phase_id=phase_id, frequency=frequency, amp=u, phi=phi, h=h)	def set_harmonic_voltage_output(self, frequency, phi_a=0, phi_b=-120, phi_c=120, ua=0, ub=0, uc=0, h_a=None, h_b=None, h_c=None, net=1):# 设置谐波电压输出（3个相位）		self._set_harmonic_phase_voltage_output(phase_id=1, frequency=frequency, u=ua, phi=phi_a, h=h_a)		self._set_harmonic_phase_voltage_output(phase_id=2, frequency=frequency, u=ub, phi=phi_b, h=h_b)		self._set_harmonic_phase_voltage_output(phase_id=3, frequency=frequency, u=uc, phi=phi_c, h=h_c)	def set_voltage_output(self, frequency, phi_a=0, phi_b=-120, phi_c=120, ua=0, ub=0, uc=0, net=1):# 设置电压信号输出（3个相位）		self._set_harmonic_phase_voltage_output(phase_id=1, frequency=frequency, u=ua, phi=phi_a)		self._set_harmonic_phase_voltage_output(phase_id=2, frequency=frequency, u=ub, phi=phi_b)		self._set_harmonic_phase_voltage_output(phase_id=3, frequency=frequency, u=uc, phi=phi_c)

def _set_harmonic_phase_current_output(self, phase_id, frequency, phi=0, i=0, mi=1, h=None, net=1):# 设置某一相位的谐波电流输出		self._generic_harmonic_output(outputType='CURRENT', phase_id=phase_id, frequency=frequency, amp=i, phi=phi, h=h)	def set_harmonic_current_output(self,frequency, phi_a=0, phi_b=-120, phi_c=120, ia=0, ib=0, ic=0, h_a=None, h_b=None, h_c=None, net=1):# 设置谐波电流输出（3个相位）		self._set_harmonic_phase_current_output(phase_id=1, frequency=frequency, i=ia, phi=phi_a, h=h_a)		self._set_harmonic_phase_current_output(phase_id=2, frequency=frequency, i=ib, phi=phi_b, h=h_b)		self._set_harmonic_phase_current_output(phase_id=3, frequency=frequency, i=ic, phi=phi_c, h=h_c)	def set_current_output(self, frequency, phi_a=0, phi_b=-120, phi_c=120, ia=0, ib=0, ic=0, net=1):# 设置电流信号输出（3个相位）		self._set_harmonic_phase_current_output(phase_id=1, frequency=frequency, i=ia, phi=phi_a)		self._set_harmonic_phase_current_output(phase_id=2, frequency=frequency, i=ib, phi=phi_b)		self._set_harmonic_phase_current_output(phase_id=3, frequency=frequency, i=ic, phi=phi_c)

	def activate_output(self):# 正式激活输出		self.send_raw_command(command='OUTP:STAT ON')	def deactivate_output(self):# 正式关闭输出		self.send_raw_command(command='OUTP:STAT OFF')