DE1098115B - Arrangement for interference suppression of a geoelectrical apparatus working according to the direct current four-probe method - Google Patents
Arrangement for interference suppression of a geoelectrical apparatus working according to the direct current four-probe methodInfo
- Publication number
- DE1098115B DE1098115B DEA23368A DEA0023368A DE1098115B DE 1098115 B DE1098115 B DE 1098115B DE A23368 A DEA23368 A DE A23368A DE A0023368 A DEA0023368 A DE A0023368A DE 1098115 B DE1098115 B DE 1098115B
- Authority
- DE
- Germany
- Prior art keywords
- arrangement
- direct current
- geoelectrical
- interference suppression
- measuring apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/02—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current
- G01V3/04—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current using dc
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Description
Anordnung zur Entstörung einer nach dem Gleichstrom-Viersondenverfahren arbeitenden geoelektrischen Apparatur Bei geoelektrischen Messungen nach dem in der Abbildung dargestellten Gleichstrom-Viersondenverfahren wird dem Erdboden über zwei Erder 1 und 2 ein Gleichstromimpuls zugeführt und der im Erdboden zwischen zwei Sonden 3 und 4 durch den Widerstand des Erdreichs verursachte Spannungsabfall gemessen. Zur Messung des Spannungsab,falles sind wegen ihres hohen Eingangswiderstandes Röhrenverstärker für Gleichspannungsverstärkung geeignet. Derartige mit Gleichspannungsverstärkern ausgerüstete Meßapparaturen sind aber störanfällig und reagieren leicht auch auf Einflüsse, welche nicht von den Meßsonden allein herrühren. Gegen galvanische Störeinflüsse, die am Aufstellungsort der Meßapparatur aus der Erde kommen können, könnte man sich - und man hat dies auch versucht - durch hohe Isolation der gesamten Apparatur gegen Erde schützen. Arrangement for interference suppression according to the direct current four-probe method working geoelectrical apparatus For geoelectrical measurements according to the in The direct current four-probe method shown in the figure is above the ground two earth electrodes 1 and 2 are supplied with a direct current pulse and the one in the ground between two probes 3 and 4 caused by the resistance of the ground voltage drop measured. They are used to measure the voltage drop because of their high input resistance Tube amplifier suitable for DC voltage amplification. Such with DC voltage amplifiers Equipped measuring apparatus are, however, prone to failure and also react easily to Influences which do not come from the measuring probes alone. Against galvanic interference, that can come from the earth at the place of installation of the measuring apparatus, one could imagine - and this has also been attempted - by high insulation of the entire apparatus against Protect earth.
Abgesehen davon, daß eine hohe Isolation gegen Erde nicht ganz einfach zu verwirklichen ist, begünstigt man dadurch Störungen, die durch Aufladungen von Schaltelementen der Apparatur mit statischer Elektrizität verursacht werden. Die Apparatur wird auch berührungsempfindlich, und das Hantieren mit ihr ist erschwert.Apart from the fact that a high level of isolation from earth is not that easy is to be realized, one favors disturbances caused by the charging of Switching elements of the apparatus are caused by static electricity. the Apparatus is also sensitive to touch, and handling it is difficult.
Es wird deshalb, und das ist der Weg, den die Erfindung steht, bewußt darauf verzichtet, die Meßapparatur als Ganzes hoch gegen Erde zu isolieren. It is therefore, and that is the way in which the invention stands, conscious refrains from isolating the measuring apparatus as a whole from high ground.
Vielmehr wird die Anordnung zur Entstörung einer nach dem Gleichstrom-Viersondenverfahren arbeitenden geoelektrischen Apparatur dadurch erreicht, daß erfindungsgemäß die beiden Eingangsbuchsen über welche die von den beiden Meß sonden gelieferte Spannung der einen Gleichspannungsverstärker aufweisenden Meßapparatur zugeführt wird. über zwei ohmsche Widerstände galvanisch verbunden sind, deren Verbindungsstelle mittels einer in nächster Nachbarschaft von der Meßapparatur in die Erde getriebenen Elektrode geerdet ist.Rather, the arrangement for interference suppression is based on the direct current four-probe method working geoelectric apparatus achieved in that according to the invention the two input sockets through which the voltage supplied by the two measuring probes the measuring apparatus having a DC voltage amplifier is supplied. above two ohmic resistors are galvanically connected, their connection point by means of an electrode driven into the earth by the measuring apparatus in the immediate vicinity is grounded.
Eine gemäß dieser Erfindung ausgebildete Anordnung, die nunmehr fünf Elektroden aufweist, ist von bekannten Anordnungen zu unterscheiden, bei denen zwar auch fünf Elektroden verwendet werden, welche jedoch alle zur Messung erforderlich sind. also eine völlig andere Aufgabe erfüllen. An arrangement formed in accordance with this invention, now five Has electrodes is to be distinguished from known arrangements in which, although five electrodes can also be used, all of which, however, are required for measurement are. so perform a completely different task.
Es sei noch bemerkt, daß es zwar bekannt ist, bei Meßgeräten, die allerdings nicht zur Messung der zwischen mit der Erde verbundenen Elektroden auftretenden Spannungsdifferenzen geeignet sind, eine Entstörung durch geeignete Erdung vorzunehmen. Ein solches Vorgehen erschien jedoch bisher bei Geräten deren Aufgabe es ist, an der Erde Messungen vorzunehmen, d. h. deren Eingänge bereits mit der Erde verbunden sein müssen und bei denen eine gewisse Potentialverteilung im Erdreich erzeugt wird, nicht anwendbar. It should also be noted that although it is known in measuring devices that however not for measuring the occurring between electrodes connected to the earth Voltage differences are suitable for interference suppression by means of suitable earthing. However, such a procedure has so far appeared in devices whose task it is to make measurements of the earth, d. H. whose inputs are already connected to earth must be and where a certain potential distribution is generated in the ground, not applicable.
Die Widerstände, über welche die Eingänge für die Meßsondenkabel geerdet werden, werden ausreichend hochohmig gewählt, damit sie keinen wesentlichen Zusammenbruch der von den Meßsonden gelieferten Spannung bewirken. Es ist vorteilhaft, wenn diese Widerstände einander gleich sind. Ferner ist es zweckmäßig, die Meßapparatur in einem geerdeten Gehäuse unterzubringen, wobei das Gehäuse über die Elektrode geerdet ist, welche zur Erdung der Verbindungsstdle der beiden hintereinander angeordneten, die Eingangsbuchsen überbrückenden Widerstände dient. The resistors through which the inputs for the probe cables be grounded, are chosen to have a sufficiently high resistance so that they do not have any significant Cause collapse of the voltage supplied by the measuring probes. It is beneficial when these resistances are equal to each other. It is also useful to use the measuring apparatus in a grounded housing, with the housing over the electrode is earthed, which is used for earthing the connection points of the two The input sockets are used to bridge resistors.
Bezugnehmend auf die Abbildung wird im folgenden eine geoelektrische Apparatur, welche die Merkmale der Erfindung trägt, beschrieben. Referring to the figure, the following is a geoelectric Apparatus embodying the features of the invention is described.
5 ist eine Spannungsquelle, welche über den Schalter 6 einen durch den Strommesser 7 kontrollierten Stromstoß über die Elektroden 1 und 2 in die Erde schickt. 8 ist ein Gleichspannungsverstärker mit angeschlossenem Spannungsmesser9. 10 ist eine variable Spannungsquelle, welche dazu dient. von den Meßelektroden herrührende Polarisationsspannungen zu kompensieren. 11 ist ein die Meßapparatur umgebendes metallisches Gehäuse, welches zwecks Erdung an die in nächster Nachbarschaft in die Erde getriebene Elektrode 12 angeschlossen ist. 13 und 14 sind die beiden ohmschen Widerstände, über welche die Eingangsbuchsen 15 und 16 für die Meßsonden geerdet sind. 5 is a voltage source, which through the switch 6 through the ammeter 7 controlled current impulse through the electrodes 1 and 2 into the earth sends. 8 is a DC voltage amplifier with a connected voltmeter 9. 10 is a variable voltage source which is used for this. originating from the measuring electrodes To compensate for polarization voltages. 11 is a surrounding the measuring apparatus metallic housing, which is connected to the in the immediate vicinity for the purpose of earthing the ground driven electrode 12 is connected. 13 and 14 are the two ohmic Resistors through which the input sockets 15 and 16 for the measuring probes are grounded are.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA23368A DE1098115B (en) | 1955-09-09 | 1955-09-09 | Arrangement for interference suppression of a geoelectrical apparatus working according to the direct current four-probe method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA23368A DE1098115B (en) | 1955-09-09 | 1955-09-09 | Arrangement for interference suppression of a geoelectrical apparatus working according to the direct current four-probe method |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1098115B true DE1098115B (en) | 1961-01-26 |
Family
ID=6925429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA23368A Pending DE1098115B (en) | 1955-09-09 | 1955-09-09 | Arrangement for interference suppression of a geoelectrical apparatus working according to the direct current four-probe method |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1098115B (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1813845A (en) * | 1929-04-19 | 1931-07-07 | Carnegie Inst Of Washington | Apparatus for the study of the earth's crust |
US1997163A (en) * | 1930-07-22 | 1935-04-09 | Swedish American Prospecting C | Electrical prospecting |
US2160824A (en) * | 1936-11-13 | 1939-06-06 | Standard Oil Dev Co | Electric earth transient in geophysical prospecting |
DE898785C (en) * | 1938-02-15 | 1953-12-03 | Prospection Electr Procedes Sc | Method and device for determining the soil layers penetrated by a borehole |
-
1955
- 1955-09-09 DE DEA23368A patent/DE1098115B/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1813845A (en) * | 1929-04-19 | 1931-07-07 | Carnegie Inst Of Washington | Apparatus for the study of the earth's crust |
US1997163A (en) * | 1930-07-22 | 1935-04-09 | Swedish American Prospecting C | Electrical prospecting |
US2160824A (en) * | 1936-11-13 | 1939-06-06 | Standard Oil Dev Co | Electric earth transient in geophysical prospecting |
DE898785C (en) * | 1938-02-15 | 1953-12-03 | Prospection Electr Procedes Sc | Method and device for determining the soil layers penetrated by a borehole |
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