数字化改造后的永安井水位观测资料分析及地震前兆监测效能评估

数字化观测过程中，高效的观测手段、可靠的观测信息、准确的校测方法，是观测质量的重要保障。永安台地下水观测点为无人值守台站，根据相关规定，观测人员每季度要对水位仪进行一次水位校测，校测值是判断水位仪是否正常工作的依据。为了提高水位校测的准确性，笔者研制了一套水位校测装置。该套装置由水位测量模块和数字化显示模块两个部分组成，基本实现了由模拟校测向数字化校测的转变。该装置已应用于永安井水位的季检工作，用该装置进行水位校测与以往采用的测钟法进行水位现场校测相比，在一定程度上降低了水位校测数据的误差，节省了工作的时间，大大提高了校测工作的效率。

Design and realization of calibration device for ground-water-level at Yongan seismic station

In the process of digital observation, efficient observation means, reliable observation information and accurate calibration method are the important guarantees for observation quality. The ground water observation station of Yongan seismic station is unattended. Calibrate the water level gauge quarterly, according to relevant regulations. Observers check the water level every quarter. The calibration value is the basis for judging whether the water level gauge is working normally. In order to ensure the accuracy and efficiency of water level calibration, the author has developed a set of water level calibration device. It consists of two parts: a water level measurement module and a digital display module. It basically realizes the transformation from analog calibration to digital calibration. The device has been applied to the quarterly water level inspection of Yongan well. Compared with the measuring bell method used by Yongan station in the past, this device can reduce the error of water level calibration data to some extent, save working time and greatly improve the efficiency of calibration work.