基于轮换瞬时驱动的光电式低功耗流量测量方法

Photoelectric Low Power Flow Measurement Method Based on Rotating Instantaneous Drive

针对传统磁式传感的涡轮流量计抗磁场干扰能力差的问题,提出了基于反射型光电式的低功耗流量测量方法。将2个红外发光二极管对准与涡轮转轴同步转动的局部反射率不同的半白半黑反光转盘,并采用轮换瞬时驱动发光的方式,通过单光电管对反射光进行光电接收。设计软件算法对接收到的光电信号进行分析和处理,求得转盘的转数,进而得到所测气体或液体的流速。主要从瞬时光电信号处理与低功耗节能角度,描述了以MSP430单片机为主控芯片的光电式流量测量系统的实现方法。耗能分析与仿真结果表明:此光电式流量测量系统在避免电磁干扰的前提下能够明显降低功耗,满足干电池供电情况下长期使用的设计要求。

Aiming at the problem that the turbine flowmeter with traditional magnetic sensing had poor anti-magnetic interference ability,a low power consumption flow measurement method based on reflected photoelectric type was proposed.The two infrared light-emitting diodes were aligned with the half-white and half-black reflective turntable with different partial reflectivity rotating synchronously with the turbine shaft.It adopted the method of alternately driving the light emitting instantaneously,and the reflected light was received by a single photoelectric tube.A software algorithm was designed to analyze and process the received photoelectric signals,the number of revolutions of the turntable was obtained,and then the measured gas or liquid flow rate was obtained.Mainly from the point of view of instantaneous photoelectric signal processing and low power consumption and energy saving,the realization method of photoelectric flow measurement system with MSP430 single chip as the main control chip was described.The energy consumption analysis and simulation results show that the photoelectric flow measurement system can significantly reduce the power consumption under the premise of avoiding electromagnetic interference,and meet the design requirements of long-term use under the condition of dry battery power supply.