两种实时计数脉冲检测方法及应用

对通过计算机实现实时计数的方法进行了研究,提出了两种实时脉冲检测方法;利用霍尔传感器在瞬变磁场作用下产生脉冲的机理,来获取计数脉冲;根据实际需要,分别选择USB或RS232实时将计数结果传给计算机,并将其应用于测试汽车雨刮器刮水频率;根据实际情况设计了计数抗干扰方法,保证在工业现场中计数测量的实时性、准确性;现整个系统已应用于实际测试中,经实际运行,计数功能部分稳定可靠,效果良好,可广泛应用于计算机参与自动控制和数据采集的场所.

Two Methods of Real Time Counting Pulses Detecting and Application

By the research into realization of real time count through the computer, two methods of real time counting pulses detecting are proposed. Obtaining counting pulses by the mechanism that the hall sensor will generate pulses in the varying magnetic field; According to the practical need, USB or RS232 is chosen to transmit the counting result to the computer, which is applied to test the scraping frequency of the windscreen wiper. To guarantee the real-time and veracity of counting measurement in the worksite, anti-jamming means are designed based on the practical circumstance. The whole system is applied into real testing now, and through practical running, the counting function part holds strong stabilization and credibility, and the effect is good.