Hogan 2011 763 records are subject to interference

763 records are subject to interference because the number of electrical measurement and troubleshooting


. 1,994,763 records are subject to interference because the number of electrical measurement and troubleshooting Lu Yongyi Li Shaoyun Xuguo E Yan Su-Ping --- ● __ - a (Anhui Province, China. 00. Taiwan Fertilizer seismic history check liter Ang large leek (China 230,031 Taiwan Fertilizer Seismological Bureau) ls · Hefei 763 seismic records are subject to electrical interference is very serious, especially when wet ground disturbance is more prominent and reached the maximum rate of 20mm (Figure 1) directly affect the normal record through repeated practice, we found interference causes and troubleshooting (1) Hefei seismic disturbance causes record 763 studio rooms and ground separated by a wall only, to power lines and 763 equipment records room layout in which the relative position shown in Figure 2, Figure A, B is a ground power lines; A and B is the power pole; M, N is the measure most; D is placed room 763; C is 763 records room. 763 instruments can be seen throughout the supply area in the ground, ground per hour, respectively, to three power lines (A,. B, A, B2, A, B.) supply a number of measuring the time interval 2-2.59 minutes in the power supply 763 to record interference, consistent when you hear the two, but three times a power supply, note the curve of Figure 1 records recorded by the interference figure was only one interference, easy to see that 763 records disruption of the ground only with a power supply line has a contact order find out what is the piece of power supply line interference on the 763 record, we made an experiment to artificially to three power supply lines, respectively, and the interval opened,Ed Hardy Donne, to distinguish power to the piece power line interference when the results proved to A.B. supply lines, interference on the 763 record, while the other two lines to supply non-interference analysis of the reasons, can be seen from Figure 2, recording room away from the electrode A close, only 5ra, while most are from other power in the 100 meters beyond the date of receipt of this period Lu Yongyi 1993-12-275, etc.: 763 ~ P_, recorded by measuring the number of electrical interference to the causes and troubleshooting 57 (2) analysis of the reasons we do not imitate the power pole A as a point electrode, it is recorded in Room C at 763 r the current density of crude saltpeter one dead right foot 7 -, where the supply current in the 2.1-2. 4A between. c, A is the medium between the surface soil, the resistivity of a great relationship with the degree of surface moisture (10. ~ 2 × 10f /, m),Hogan 2011, which is easy to see, when the ground is wet, the resistance rate smaller, such as terminal 763 galvanometer dust, plus the air is humid, so a large current density,Ed Hardy outlet UNIX operating system backup hard, there will be a weak current through the terminal into the galvanometer, the galvanometer sensitivity is high (current constant-6 -7 × l0-11A · m / ram), so there will be a strong interference experiment also proved this point we are away from the power pole A. 3 meters from a ground probe buried in the ground dry + it with 763 housing connected to the galvanometer, so that between the two - Alu. N 2 line around the room layout and location of records resistivity smaller, is in effect the ground wet, the results of serious interference, remove the ground after , interference exclude addition, the need to point out, nothing to interfere with the pendulum experiment also illustrates this point, put out under a cycloid,a buon mercato Hogan scarpe, ground power supply is still interference, and (3) exclusion method ① keep? 63 records room dry and clean} ② cycloid and the input resistance of overhead ground, it does not touch the instrument pier; ③ found to have interfered with anhydrous alcohol scrub 763 galvanometer terminal + off outside interference current through the terminal to enter the examination flow meter; ④ the most reliable method is to migrate 763 records room or ground power pole, so that the distance between the two not too close. to take the appropriate measures, the 763 record to exclude the interference of the number of electrical measurement,Hogan uomo, and withstood the test of 3 months. Thedisturbancereasonofgeoelectricityfor763seismogr aphanditseliminationmethodLuYongyi, LiShaoyun + XuOuoeandYanSuping (SeismicStationofHefei, AnhuiProvince230031, China) ZhengZhikunandShiShengda (SeismologicalBureauofA ~ huiProvince, Hefei230031, China)