摘要:
PURPOSE:To measure direction and velocity of flow of ground water at an observation well by providing a heater and three or more temperature sensors non- linearly on the same surface of surrounding water in an observation well. CONSTITUTION:Ground water 17 is standing in an observation well about 50cm in diameter and several tens of meters deep. A detecting section 10 is fixed horizontally by a cable 18 and immersed in ground water 17. A heater 12 is provided at the center of the detecting section 10, and four temperature sensors 13- 16 are arranged at a distance of 90 deg. and at equal distance from the heater 12 in the same surface of surrounding water. Temperature information is frequency converted by an electronic circuit 19 and inputted to a signal processing device on the ground. These are protected by a reticulated sensor protector 11. Temperature of ground water is raised by the heater 12, and temperatur rise at points of specified distance is measured by sensors. Thus, direction and velocity of flow of ground water can be measured.
摘要:
PURPOSE:To survey the direction of a ground water flow with an extremely slow speed without any limitation of a reagent by charging a reagent cylinder in the internal pipe of a double pipe, and reading a flowing current by using electrodes in four chambers partitioned by a cruciform bulkhead between the external and the internal pipes. CONSTITUTION:The space between the internal pipe 1 and external pipe 2 is partitioned by the bulkhead 3 into the four chambers; each chamber is provided with an electrode 7 in contact with the external pipe, and their cords 4 are bundled and extended along the prolongation part of the internal pipe. The reagent cylinder 5 is slidable in the internal pipe 1 and elevated from the ground by a wire rope 8 connected to the ring of the head part. This device is set at specified depth in a single hole made under the ground and when the disturbance of the ground water converges, the rope 8 is elevated to dissolve a salt, and the ammeters of the respective chambers are read to judge that a direction wherein a current increases first is a downstream direction.
摘要:
A pendulum-type landslide monitoring system includes an outer tube for being implanted into a ground to be monitored; a plurality of measuring units, vertically aligned inside the outer tube for independently measuring displacement at different depths in the ground; a guiding tube inside the outer tube for a flexible image capturing device to pass therethrough; and a water-level monitoring tube installed in the outer tube. Thereby, the flexible image capturing device can capture data of the displacement obtained by the measuring units, for an operator to identify displacement of a sliding surface in the ground, and to visually observe images of flowing groundwater captured by the flexible image capturing device in the outer tube, in order to further determining groundwater flow patterns as well stratums in the ground.
摘要:
A flow meter to be used in a hole drilled in the bedrock for measuring stream flows in bedrock fractures which are transversal to the hole. The flow meter comprises an elongated body having a cross section which is substantially smaller than the diameter of the hole; separating members placed at a distance from each other in the longitudinal direction of the body for separating the examined section from the other parts of the hole in a substantially pressure-tight manner; dividing members for dividing the examined section into two sectors in the longitudinal direction of the hole; and a flow channel extending through the body and equipped with a flow sensor for measuring the direction and rate of the flow between the sectors. In accordance with the invention, the dividing members are formed of thin and elastic sealing strips, which have been fixed to the body and, being substantially perpendicular to the surface of the body, arranged to surround and delimit the sectors.
摘要:
PURPOSE:To decide whether the detector is in a proper state or not every time a body is detected by inputting a signal from the detector to a comparator which decides whether the body is present or not and a comparator which detects whether the detector is in the normal state or not. CONSTITUTION:A light beam from a projector 2 is reflected by the body to be detected and then photodetected by a photodetector 3. The detection signal comparator 4 compares the detection signal with a reference level to decide whether the object body is present or not. The proper state comparator 5 compares the detection signal with a reference level and outputs a decision signal. A holding circuit 6 is reset with the output of the comparator 4 through a trigger generating circuit 7 and the current output of the comparator 5 is outputted to a latch circuit 8. When the output of the comparator 4 goes down to a low level and inputs its signal to the control input terminal CP of the latch circuit 8 through an NOT circuit 9, the latch circuit 8 outputs information of the holding circuit 6 to a driving circuit 10. Consequently, the detector 1 decides whether the detector 1 is in the proper state or not every the body is detected.
摘要:
본 발명은 더블패커를 이용한 구간별 수리시험 시스템 및 그 방법을 개시한다. 더블패커를 이용한 구간별 수리시험 시스템은, 상부패커; 하부패커; 조사 심도 구간 내에 배치되어 지하수를 양수하는 수중펌프; 수중펌프에 연결되어 수중펌프에 의해 양수된 지하수를 외부로 유출하는 양수관; 조사 심도 구간에 회복 시험수를 주입하는 주입관; 양수관과 주입관을 연결하도록 배치된 우회관; 양수관, 주입관 및 우회관 사이에서 지하수의 공급 경로를 개폐하는 밸브류; 및 (i) 양수시험 요청에 따라 수중펌프를 구동시키고, 밸브류를 제어하여 수중펌프에 의해 양수된 지하수를 우회관을 경유하여 조사 심도 구간에 재주입하고, (ii) 일정 시간이 경과함에 따라 밸브류를 제어하여 수중펌프에 의해 양수된 지하수를 관측관정 외부로 배출시키는 양수시험을 수행하고, (iii) 양수시험이 종료됨에 따라 수중펌프의 동작을 정지시키고, 밸브류를 제어하여 조사 심도 구간에 대한 회복 시험을 수행하는 제어부를 포함한다.