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采用红外通信的智能化抄表器电路设计

更新时间:2020-06-30 12:12:19 大小:277K 上传用户:zhiyao6查看TA发布的资源 标签:红外通信智能抄表器 下载积分:5分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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基于红外通信原理,设计智能电表的红外通信抄表器电路.在其发射电路中,采用两个红外发射管串联,以减小红外发射电路中的反馈电阻和并联一个小电容的方法来增大发射强度;而在其接收电路中,PIN型光电二极管接收光信号后直接进入带通滤波器,然后依次进入限幅放大器和前置放大器,以避免周边环境光使前置放大器进入饱和区或者截止区,增大红外传输距离.测试结果表明:红外通信距离在5m内,抄表数据的相对误差低于0.85%.

Based on infrared communication principle, this paper design a smart meter infrared communications circuit. In the transmitter circuit design, two cascade infrared emitting diode used to reduce the feedback resistor in the infrared transmitter circuit and parallel a small capacitor used to increase emission intensity. In the receiver circuits, the PIN photodiode received an optical signal and put it directly into the band-pass filter, and then turn into the limiting amplifier and preamplifier to avoid the surrounding ambient light to make pre-amplifier turn to saturation or cutoff region. The result is to increase the infrared transmission distance. Test results show that the infrared communication within a distance of 5 m relative error ...

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采用红外通信的智能化抄表器电路设计.pdf 277K

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