268 lines
11 KiB
Python
268 lines
11 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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'''
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# @Time : 2025/11/17 18:51
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# @Author : reenrr
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# @File : opcua_client_test1111.py
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'''
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from PySide6.QtCore import QTimer, Slot, Signal, QObject, QThread, Qt
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from opcua import Client, ua
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from datetime import datetime
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# -----------
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# 参数配置
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# -----------
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OPC_SERVER_URL = "opc.tcp://localhost:4841/zjsh_feed/server/"
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RECONNECT_INTERVAL = 2000 # 重连间隔（毫秒）
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DATA_READ_INTERVAL = 2000 # 数据读取间隔（毫秒，与服务端更新频率一致）
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class OpcuaClient(QObject):
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# 客户端的信号接口
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weight_updated = Signal(dict) # 重量更新信号（传递 {"hopper_up_weight": 值, "hopper_down_weight": 值}）
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connection_status_changed = Signal(bool) # 连接状态更新信号（True=连接，False=断开）
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upper_weight_error = Signal(bool) # 上料斗重量异常信号（True=异常，False=正常）
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down_weight_error = Signal(bool) # 下料斗重量异常信号（True=异常，False=正常）
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def __init__(self, parent=None):
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super().__init__(parent)
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self.is_running = False # 系统运行状态标记
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self.latest_weight_data = {"hopper_up_weight": 0, "hopper_down_weight": 0} # 缓存最新重量数据
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# ---------------
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# OPC UA 客户端核心配置
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# ---------------
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self.opc_client = None # OPC UA 客户端实例（延迟初始化）
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self.opc_server_url = OPC_SERVER_URL
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self.upper_weight_node = None # 上料斗重量节点对象
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self.lower_weight_node = None # 下料斗重量节点对象
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self.is_opc_connected = False # OPC UA 连接状态标记
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self.has_connected_once = False # 至少连接成功一次标记
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self.reconnect_count = 0 # 重连次数计数器
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# 重连定时器（连接断开时触发）
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self.reconnect_timer = QTimer(self)
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self.reconnect_timer.setInterval(RECONNECT_INTERVAL)
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self.reconnect_timer.timeout.connect(self.reconnect_to_server)
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# 数据读取定时器（连接成功后触发，定时读取重量数据）
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self.data_read_timer = QTimer(self)
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self.data_read_timer.setInterval(DATA_READ_INTERVAL)
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self.data_read_timer.timeout.connect(self._read_weight_data)
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# 初始化 OPC UA 客户端
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self._init_opc_client()
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# ---------------------
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# OPC UA 初始化相关函数
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# ---------------------
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def _init_opc_client(self):
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"""初始化 OPC UA 客户端实例"""
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try:
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self.opc_client = Client(self.opc_server_url)
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print("OPC UA 客户端初始化成功")
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except Exception as e:
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print(f"OPC UA 客户端初始化失败：{e}")
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self.opc_client = None
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def start_connect(self):
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"""启动连接（供外部调用，主动发起连接请求）"""
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self._connect_to_server()
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# ---------------------
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# 连接管理相关函数
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# ---------------------
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def reconnect_to_server(self):
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"""重连执行函数（与原 TCP 客户端一致）"""
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if not self.is_opc_connected:
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self.reconnect_count += 1
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# 日志优化：每10次重连提示一次，避免日志刷屏
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if self.reconnect_count % 10 == 0:
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print(f"已连续重连{self.reconnect_count}次，仍未连接服务端，请检查服务端状态...")
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else:
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print(f"第{self.reconnect_count}次重连请求：{self.opc_server_url}")
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self._connect_to_server()
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def _connect_to_server(self):
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"""主动发起 OPC UA 连接（核心连接逻辑）"""
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if self.is_opc_connected or not self.opc_client:
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return
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try:
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# 1. 连接到 OPC UA 服务器
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self.opc_client.connect()
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print(f"OPC UA 连接成功：{self.opc_server_url}")
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# 2. 获取重量节点对象（仅连接成功时获取一次）
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objects = self.opc_client.get_objects_node() # 根节点
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self.upper_weight_node = objects.get_child(["2:upper", "2:upper_weight"])
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objects = self.opc_client.get_objects_node() # 根节点
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self.lower_weight_node = objects.get_child(["2:lower", "2:lower_weight"])
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# 3. 验证节点是否有效
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self._verify_nodes()
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# 4. 更新连接状态
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self.is_opc_connected = True
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self.has_connected_once = True
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self.reconnect_count = 0
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self.is_running = True
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# 5. 发送信号（连接成功+错误状态重置）
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self.connection_status_changed.emit(True)
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self.upper_weight_error.emit(False)
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self.down_weight_error.emit(False)
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# 6. 启动数据读取定时器，停止重连定时器
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self.data_read_timer.start()
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self.reconnect_timer.stop()
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# 7. 立即读取一次初始数据
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self._read_weight_data()
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except Exception as e:
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print(f"OPC UA 连接失败：{e}")
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self._handle_connect_failed()
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def _reconnect_to_server(self):
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"""重连执行函数"""
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if self.is_opc_connected:
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return
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self.reconnect_count += 1
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# 日志优化：每10次重连提示一次，避免日志刷屏
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if self.reconnect_count % 10 == 0:
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print(f"已连续重连{self.reconnect_count}次，仍未连接服务端，请检查服务端状态...")
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else:
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print(f"第{self.reconnect_count}次重连请求：{self.opc_server_url}")
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self._connect_to_server()
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def _disconnect_from_server(self):
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"""主动断开 OPC UA 连接"""
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if self.opc_client and self.is_opc_connected:
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try:
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self.opc_client.disconnect()
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print(f"OPC UA 连接断开：{self.opc_server_url}")
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except Exception as e:
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print(f"OPC UA 断开连接失败：{e}")
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# 更新状态
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self.is_opc_connected = False
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self.is_running = False
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self.upper_weight_node = None
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self.lower_weight_node = None
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# 停止数据读取定时器
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self.data_read_timer.stop()
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def _handle_connect_failed(self):
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"""处理连接失败逻辑"""
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self.is_opc_connected = False
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self.is_running = False
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# 发送连接断开信号
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self.connection_status_changed.emit(False)
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# 发送重量清零信号
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self.weight_updated.emit({"hopper_up_weight": "", "hopper_down_weight": ""})
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# 标记重量异常
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self.upper_weight_error.emit(True)
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self.down_weight_error.emit(True)
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# 启动重连定时器（首次连接失败或重连失败时）
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if not self.reconnect_timer.isActive():
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print(f"将在{RECONNECT_INTERVAL / 1000}秒后启动重连...")
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self.reconnect_timer.start()
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def _verify_nodes(self):
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"""验证重量节点是否有效（避免节点ID错误）"""
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try:
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# 读取节点的基本信息，验证节点存在
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upper_node_id = self.upper_weight_node.nodeid
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lower_node_id = self.lower_weight_node.nodeid
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print(f"节点验证成功：上料斗节点={upper_node_id}, 下料斗节点={lower_node_id}")
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except Exception as e:
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raise RuntimeError(f"节点验证失败（节点ID可能错误）：{e}")
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# ---------------------
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# 数据读取与处理相关函数
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# ---------------------
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@Slot()
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def _read_weight_data(self):
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"""定时读取重量数据（核心业务逻辑）"""
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if not self.is_opc_connected or not self.upper_weight_node or not self.lower_weight_node:
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return
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try:
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# 读取 OPC UA 节点的重量值
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upper_weight = self.upper_weight_node.get_value()
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lower_weight = self.lower_weight_node.get_value()
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# 数据有效性校验（过滤异常值）
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upper_weight = round(float(upper_weight), 2) if self._is_valid_weight(upper_weight) else "error"
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lower_weight = round(float(lower_weight), 2) if self._is_valid_weight(lower_weight) else "error"
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# 构建重量数据字典（与原 TCP 客户端格式一致）
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weight_data = {
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"hopper_up_weight": upper_weight,
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"hopper_down_weight": lower_weight
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}
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self.latest_weight_data = weight_data
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# 错误状态判断（完全复用原 TCP 客户端逻辑）
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if upper_weight == "error" and lower_weight == "error":
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self.weight_updated.emit({"hopper_up_weight": "", "hopper_down_weight": ""})
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self.upper_weight_error.emit(True)
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self.down_weight_error.emit(True)
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elif upper_weight == "error":
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self.weight_updated.emit({"hopper_up_weight": "", "hopper_down_weight": lower_weight})
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self.upper_weight_error.emit(True)
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self.down_weight_error.emit(False)
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elif lower_weight == "error":
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self.weight_updated.emit({"hopper_up_weight": upper_weight, "hopper_down_weight": ""})
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self.upper_weight_error.emit(False)
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self.down_weight_error.emit(True)
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else:
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self.weight_updated.emit(weight_data)
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self.upper_weight_error.emit(False)
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self.down_weight_error.emit(False)
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print(f"OPC UA 数据读取成功：上料斗={upper_weight} kg, 下料斗={lower_weight} kg")
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except Exception as e:
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print(f"OPC UA 数据读取失败：{e}")
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# 读取失败时标记为异常
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self.weight_updated.emit({"hopper_up_weight": "", "hopper_down_weight": ""})
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self.upper_weight_error.emit(True)
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self.down_weight_error.emit(True)
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# 读取失败可能是连接异常，触发重连
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self._disconnect_from_server()
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if not self.reconnect_timer.isActive():
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self.reconnect_timer.start()
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def _is_valid_weight(self, weight_value):
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"""验证重量值是否有效"""
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try:
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weight = float(weight_value)
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# 结合业务场景：重量值应大于0（模拟传感器有效范围）
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return weight >= 0
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except (ValueError, TypeError):
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return False
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# ---------------------
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# 外部接口函数（与原 TCP 客户端一致）
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# ---------------------
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def stop(self):
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"""停止 OPC UA 客户端（断开连接、停止定时器）"""
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self.reconnect_timer.stop()
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self.data_read_timer.stop()
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self._disconnect_from_server()
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self.is_running = False
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print("OPC UA 客户端已停止")
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def get_current_time(self):
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"""获取格式化的当前时间（保持原接口）"""
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return datetime.now().strftime('%Y-%m-%d %H:%M:%S') |