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本文介绍了一种由作者设计的、由两个单片机控制的智能遥测式电子衡。文章着重论述了为提高遥测系统精度、稳定性和可靠性在系统硬件和软件设计中使用的一些重要方法和技术。它们是:1.用电压比率测量法消除电源电压变化对测量结果的不利影响。2.创造性地设计一种遵从电压比率测量法规则的偏置电源,使仪用放大器的输出产生偏移,从而使系统测试内分辨率提高一倍。3.数字滤波技术减小随机误差和偶然干扰的影响。4.使用校准数据修正系统误差。5.用自动零跟踪技术克服系统的缓慢漂移。6.严格的检错方法用于检查无线数据传输,保证了系统的可靠性。以上方法和技术使系统性能达到国际OIMLⅡ级秤标准。这些方法和技术也可用于其他模拟量测量和遥测系统中。
This article presents a smart telemetry electronic balance designed by the author and controlled by two microcontrollers. The article focuses on some important methods and techniques used in system hardware and software design to improve the accuracy, stability and reliability of telemetry system. They are: 1. Elimination of adverse effects of variations in supply voltage on the measurement results using voltage ratio measurement. 2. Creatively design a bias supply that complies with the voltage ratio measurement rules to offset the output of the instrumentation amplifier, doubling the resolution of the system test. 3. Digital filtering technology to reduce the impact of random errors and accidental interference. 4. Use calibration data to correct systematic errors. 5. With automatic zero tracking technology to overcome the system slow drift. 6. Strict error detection method for checking wireless data transmission, to ensure the reliability of the system. The above methods and techniques make the system performance meet the international OIML Ⅱ level scale standards. These methods and techniques can also be used in other analog measurement and telemetry systems.