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一、问题的提出某水利研究部门,试用电感测微仪测量坝基承力的变形。当电感测微仪指示满刻度后,要求将指针调回零位(测头的位置不动),以便继续指示其受力变形情况。利用电感测微仪测量地壳变形、地倾斜,以及热变形、应力变形等均存在类似情况。当时,用和差的方法解决这种问题;即一测头测量变形,一测头通过“和差装置”的相减,给出补偿信号。因同时占用两只测头和“和差装置”,操作不方便,设备复杂,范围略小,不能体现电感测微仪测量的优点。故提出转移零位方法。
First, the issue put forward Some water research department, try inductance micrometer to measure the deformation of the dam foundation bearing capacity. When the inductive micrometer indicates full scale, it is required to return the pointer to zero (the position of the probe does not move), so as to continue to indicate the stress and deformation. The use of inductance micrometer to measure crustal deformation, ground tilt, and thermal deformation, stress and deformation are similar. At the time, this problem was solved by using the sum and difference methods; that is, the deformation of a measuring head, and the subtraction of a measuring head by means of subtraction of the measuring head to give a compensation signal. Due to occupying two probes at the same time and “difference and poor device,” inconvenient operation, complex equipment, the range is slightly smaller, can not reflect the advantages of inductive micrometer measurements. It is proposed to transfer zero method.