| 基于超声波回波衰减理论的超声波浓度计设计 |
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| 引用本文： | 单淑娟,吕国丰.基于超声波回波衰减理论的超声波浓度计设计[J].单片机与嵌入式系统应用,2009(12):53-55. |
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| 作者姓名： | 单淑娟 吕国丰 |
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| 作者单位： | 丹东东方测控技术有限公司 |
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| 摘 要： | 基于超声波回波衰减理论,以微控制器C8051F021为核心控制超声波发射和接收电路,实现超声波浓度计的设计。采用直接数字频率合成芯片AD9833产生脉冲串,经过功率放大电路驱动超声波换能器,超声波经过悬浊液到达接收换能器,利用92dB动态范围的对数放大器AD8307对回波衰减信号进行检波放大,最后由微控制器对数据进行处理得出浓度值。超声波浓度计在工业控制中有较高的应用价值。
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| 关 键 词： | 超声波浓度计 超声波回波衰减 C8051F021 直接频率数字合成 对数放大器 |
Ultrasonic Density Meter Design Based on Ultrasonic Echo Attenuation Theory |
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| Shan Shujuan,Lü Guofeng.Ultrasonic Density Meter Design Based on Ultrasonic Echo Attenuation Theory[J].Microcontrollers & Embedded Systems,2009(12):53-55. |
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| Authors: | Shan Shujuan Lü Guofeng |
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| Affiliation: | Shan Shujuan,Lü Guofeng Dandong Dongfang Measurement & Control Technology Co.,Ltd |
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| Abstract: | An ultrasonic density meter is designed based on ultrasonic echo attenuation theory.System core is microcontroller C8051F021 which controls the ultrasonic transmit/receive circuits.The transmit circuit is based on DDS AD9833 which produces the pulse string.The receive circuit demodulates signals by using 92 dB logarithmic amplifier AD8307.Ultrasonic density meter is quite useful in industrial control. |
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| Keywords: | C8051F021 |
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