一、前言目前,在社会上流行的称重设备,一般为横杆式,传统的杠杆称重设备不仅笨重,消耗大量的钢材,而且精度较低。目前较为先进的电子称重设备,已在地上衡、地中型、台称,吊称、料斗称等范围广泛使用、一般称重精度为0.05％～0.03％左右。电子称重设备由于采用了先进的电子技术和传感技术,其构造原理、操作技术、使用效果各方面都已经完全脱离了机械杠杆称的概念,它反应灵敏、称量直观、稳定可靠、偏载性好、寿命长。随着光纤的问世,一种新型的光纤压力传感器正在世界上加紧研制。这种光纤传感器除具备现有电子 I. Introduction At present, the weighing equipment popular in the society is generally horizontal bar type. The traditional lever weighing equipment is not only bulky, consumes a large amount of steel, but also has lower accuracy. At present, the more advanced electronic weighing equipment has been widely used in the fields of scale, medium and medium scale, table scale, hanging scale and hopper scale. The general weighing accuracy is about 0.05% to 0.03%. Due to the adoption of advanced electronic technology and sensing technology, the electronic weighting equipment has been completely separated from the concept of mechanical lever in terms of its construction principle, operation technique and use effect. It is responsive, weighing intuitive, stable and reliable, partial Good load, long life. With the advent of optical fiber, a new type of optical fiber pressure sensor is being developed in the world. This kind of optical fiber sensor except has the existing electron