update float32 to float64

Zmq/filterProcess.py

@@ -18,7 +18,7 @@ class FilterRingBuffer:
         self.n_chan = n_chan
         self.n_points = n_points
 
-        self.buffer = np.zeros((n_chan, n_points), dtype=np.float32)
+        self.buffer = np.zeros((n_chan, n_points), dtype=np.float64)
         self.current_ptr = 0  # 写入指针：指向下一个要写入的位置
         self.total_samples = 0  # 已写入总点数
         self.lock = threading.Lock()  # 线程安全锁