FBM201d P0922YK 欧美备件 CPU模块 PLC控制器

FBM201d P0922YK 欧美备件 CPU模块 PLC控制器

FBM201d福克斯波罗FOXBORO控制器,汽包液位计的远传控制功能主要是利用磁致伸缩原理、通过两个不同磁场相交产生一个应变脉冲信号来准确地测量位置的。

测量元件是一根波导管,波导管内的元件由特殊的磁致伸缩材料制成的。测量过程是由传感器的电子室内产生电流脉冲,该电流脉冲在波导管内传输,从而在波导管外产生一个圆周磁场,当该磁场和套在波导管上作为位置变化的活动磁环产生的磁场相交时,由于磁致伸缩的作用,波导管内会产生一个应变机械波脉冲信号,这个应变机械波脉冲信号以固定的声音速度传输,并很快被电子室所检测到。

由于这个应变机械波脉冲信号在波导管内的传输时间和活动磁环与电子室之间的距离成正比,通过测量时间,就可以高度精确地确定这个距离。由于输出信号是一个真正的值,而不是比例的或放大处理的信号,所以不存在信号漂移或变值的情况,更无需定期重标。

FBM201d FOXBORO controller, the remote control function of the drum level meter is mainly to use the principle of magnetostriction, through the intersection of two different magnetic fields to produce a strain pulse signal to accurately measure the position.

The measuring element is a waveguide, and the element in the waveguide tube is made of special magnetostrictive material. The measurement process is generated by the electronic chamber of the sensor to generate a current pulse, which is transmitted in the waveguide tube, thus generating a circumferent magnetic field outside the waveguide. When the magnetic field intersects with the magnetic field generated by the active magnetic ring set on the waveguide as a position change, a strain mechanical wave pulse signal will be generated in the waveguide tube due to the effect of magnetostriction The signal is transmitted at a fixed speed of sound and is quickly detected by the electronic chamber.

Since the transmission time of the strain mechanical pulse signal in the waveguide tube is proportional to the distance between the active magnetic ring and the electron chamber, this distance can be determined with high accuracy by measuring the time. Since the output signal is a true value and not a proportional or amplified signal, there is no signal drift or variation, much less the need for periodic re-labeling.