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目的为了提高热能表的计量精度及降低功率损耗,使热能表适用于更广泛的热量计量.方法从热量测量的基本原理出发,结合供暖系统的技术指标,根据时差法的测量原理,研制了一种新型的超声波热能表.结果实验数据表明该超声波热能表获得了良好的测量结果,其温度误差小于0.04℃、测量误差小于±1.2%,热量表的平均工作电流不超过36μA,休眠时电流小于6.5μA,平均功耗小于0.13 mW.结论基于TDC-GP1的超声波热能表解决了传统热表计量精度较低和功率损耗大的缺点.
Aim To improve the measurement precision of thermal energy meter and reduce the power loss, the heat meter is suitable for a wider range of calorimetric measurement.Methods Based on the basic principle of calorimetry, combined with the technical indicators of heating system, according to the measuring principle of time difference method, a Results The experimental data show that the ultrasonic heat meter has obtained good measurement results, the temperature error is less than 0.04 ℃, the measurement error is less than ± 1.2%, the average working current of the heat meter does not exceed 36μA, the current during dormancy is less than 6.5μA, and the average power consumption is less than 0.13 mW.Conclusion The TDC-GP1-based ultrasonic energy heat meter solves the disadvantages of traditional heat meters, such as low measurement accuracy and large power loss.