【经纬度教学演示仪（32cm） 中英双语介绍】
一、中文版（420字）
本款经纬度教学演示仪专为初高中地理及天文基础教育研发，采用32厘米直径球体设计，精准还原地球形态与空间坐标系统。主体由高精度工程塑料打造，兼顾轻量化与耐用性，可满足课堂频繁演示需求。
产品创新融合传统地球仪与经纬仪原理，通过立体化结构直观展现地理坐标系运作机制。球面采用双色激光印刷工艺，蓝色海洋与大地色陆地形成鲜明对比，0.5mm精度的经纬网络覆盖整个球体，赤道、回归线、极圈等关键纬线均以不同色标突出显示。可拆卸式黄道面环配备23.5°倾斜支架，动态模拟地球公转轨道平面，帮助学生理解四季成因与太阳直射点移动规律。
教学功能方面，该仪器支持六大核心演示：1）经线与时区对应关系 2）纬线与气候带分布 3）晨昏线动态模拟 4）太阳高度角计算原理 5）地理坐标定位实践 6）简单天文方位测定。配套360°旋转金属支架内置15°间隔定位卡扣，教师可精确展示地球自转引起的天体视运动现象。
底座集成方位刻度盘与简易测角装置，通过可调节仰角指针实现基础天文观测教学。球体表面特殊哑光处理有效避免反光干扰，保证教室各角度可视性。所有组件均采用圆角安全设计，符合教学场所安全规范。
本教具通过多维度可视化设计，将抽象的空间坐标系具象化，特别适用于《地球运动》、《地理坐标》、《基础天文观测》等课程模块。实践证明，该仪器能有效提升学生对三维空间概念的认知能力，培养地理空间思维素养。
二、English Version（230 words）
Geographic Coordinate Demonstrator (32cm)
This innovative teaching instrument integrates terrestrial and celestial coordinate systems within a 32cm diameter sphere. Crafted from durable engineering plastic, the device features a tilt-adjustable base replicating Earth s 23.5° axial inclination, enabling dynamic demonstration of planetary motions.
Key features include:
- Dual-layer azimuth/elevation scale with 360° rotation capability
- High-precision etched longitude/latitude grid (1° interval)
- Removable ecliptic plane ring for seasonal demonstration
- Anti-glare surface treatment ensuring classroom visibility
- Safety-enhanced components with rounded edges
The sphere s surface displays essential geographic elements through advanced printing technology, while the detachable declination dial allows basic astronomical measurement exercises. Teachers can effectively illustrate celestial navigation principles, time zone calculations, and solar altitude variations through hands-on manipulation.
The integrated tilt mechanism supports 16-position locking for precise angular demonstrations. A unique twilight line simulator helps visualize diurnal cycles. This multidisciplinary tool bridges geography and astronomy education, making abstract spatial concepts tangible for secondary students.
Practical applications cover:
- Coordinate system fundamentals
- Earth-Sun relationship
- Seasonal variation mechanisms
- Astronomical observation basics
- Spatial reasoning development
Designed for interactive learning, this demonstrator enhances STEM education through three-dimensional problem-solving scenarios. Its compact size (32cm diameter) ensures convenient classroom deployment while maintaining optimal detail visibility. All components withstand daily educational use, providing lasting value for geography and astronomy programs.
