Initial commit

2026-04-27 14:51:49 +08:00
commit dbbfc2867d
69 changed files with 68307 additions and 0 deletions
@@ -0,0 +1,129 @@
+import os
+from pathlib import Path
+import sys
+
+os.environ.setdefault("MPLCONFIGDIR", "/tmp/matplotlib")
+
+import schemdraw
+import schemdraw.elements as elm
+from schemdraw.segments import SegmentText
+
+FONT_NAME = "STIXGeneral"
+BG_COLOR = "white"
+DEFAULT_OUTPUT = Path(__file__).resolve().parent.parent / "image" / "target_circuit_measure.svg"
+
+
+def add_text(
+    drawing,
+    position,
+    text,
+    *,
+    fontsize=18,
+    rotation=0,
+    align=("center", "center"),
+):
+    element = elm.Element().at(position).anchor("center").hold()
+    element.anchors["center"] = (0, 0)
+    element.segments.append(
+        SegmentText(
+            (0, 0),
+            text,
+            rotation=rotation,
+            align=align,
+            fontsize=fontsize,
+            font=FONT_NAME,
+        )
+    )
+    drawing.add(element)
+
+
+def draw_circuit(save_path=DEFAULT_OUTPUT):
+    save_path = Path(save_path)
+    save_path.parent.mkdir(parents=True, exist_ok=True)
+
+    with schemdraw.Drawing(show=False) as d:
+        d.config(
+            unit=1.0,
+            fontsize=18,
+            font=FONT_NAME,
+            lw=2.2,
+            margin=0.2,
+            bgcolor=BG_COLOR,
+        )
+
+        # 左侧原电路
+        left_node = (1.4, 4.0)
+        top_node = (5.2, 6.6)
+        bottom_node = (5.2, 1.9)
+        right_node = (9.3, 4.0)
+        bottom_left = (1.4, 0.8)
+
+        source_start = (4.8, 0.8)
+        source_len = 1.6
+        source_end = (source_start[0] + source_len, source_start[1])
+
+        d.add(elm.ResistorIEC().at(left_node).to(top_node).hold())
+        d.add(elm.ResistorIEC().at(left_node).to(bottom_node).hold())
+        d.add(elm.ResistorIEC().at(top_node).to(right_node).hold())
+        d.add(elm.Source().at(bottom_node).up(top_node[1] - bottom_node[1]).hold())
+        d.add(elm.ResistorIEC().at(bottom_left).up(left_node[1] - bottom_left[1]).hold())
+
+        d.add(elm.Line().at(bottom_left).right(source_start[0] - bottom_left[0]).hold())
+        d.add(elm.Source().at(source_start).right(source_len).hold())
+        d.add(elm.Line().at(source_end).right(right_node[0] - source_end[0]).hold())
+
+        d.add(elm.Line().at(right_node).down(right_node[1] - source_start[1]).hold())
+
+        # 左侧源符号细节
+        source_center_y = (top_node[1] + bottom_node[1]) / 2
+        d.add(elm.Line().at((4.74, source_center_y)).right(0.92).hold())
+        d.add(elm.Arrow().at((5.2, 4.9)).up(1.0).hold())
+        d.add(elm.Line().at(source_start).right(source_len).hold())
+
+        # 右侧测量电路，尽量使用 schemdraw 自带电表与可变电阻元件。
+        meter_top = (10.75, 4.0)
+        meter_bottom_y = bottom_node[1]
+        b_node = (14.2, bottom_node[1])
+        a_left = (12.15, meter_top[1])
+        a_node = (14.2, meter_top[1])
+        load_x = 15.8
+
+        d.add(elm.Line().at(right_node).right(meter_top[0] - right_node[0]).hold())
+        d.add(elm.MeterV().at(meter_top).down(meter_top[1] - meter_bottom_y).hold())
+        d.add(elm.Line().at(bottom_node).right(b_node[0] - bottom_node[0]).hold())
+
+        d.add(elm.MeterA().at(meter_top).right(a_left[0] - meter_top[0]).hold())
+        d.add(elm.Line().at(a_left).right(a_node[0] - a_left[0]).hold())
+
+        d.add(elm.Dot(open=True, radius=0.1).at(a_node).hold())
+        d.add(elm.Dot(open=True, radius=0.1).at(b_node).hold())
+
+        d.add(elm.Line().at(a_node).right(load_x - a_node[0]).hold())
+        d.add(elm.Line().at(b_node).right(load_x - b_node[0]).hold())
+        d.add(elm.ResistorVarIEC().at((load_x, b_node[1])).up(a_node[1] - b_node[1]).hold())
+
+        # 关键节点
+        for point in [left_node, top_node, bottom_node, right_node, (right_node[0], bottom_node[1])]:
+            d.add(elm.Dot(radius=0.085).at(point).hold())
+
+        # 文本标注
+        add_text(d, (2.35, 5.18), r"$R_1$", fontsize=19)
+        add_text(d, (8.78, 5.12), r"$R_3$", fontsize=19)
+        add_text(d, (2.42, 2.62), r"$R_2$", fontsize=19)
+        add_text(d, (0.55, 1.28), r"$R_4$", fontsize=19)
+        add_text(d, (6.42, 4.82), r"$I_S$", fontsize=19)
+
+        add_text(d, (4.3, 0.36), "-", fontsize=21)
+        add_text(d, (6.98, 0.36), "+", fontsize=21)
+        add_text(d, (4.78, -0.05), r"$U_S$", fontsize=19)
+
+        add_text(d, (13.35, 1.35), "B", fontsize=16)
+        add_text(d, (16.55, 3.0), r"$R_L$", fontsize=19)
+        d.save(str(save_path), transparent=False)
+
+    print(f"saved to: {save_path}")
+
+
+if __name__ == "__main__":
+    output_path = sys.argv[1] if len(sys.argv) > 1 else DEFAULT_OUTPUT
+    draw_circuit(output_path)