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How to reasonably choose the pole distance, point distance and number of measuring points for underground water detector

Views: 1     Author: pqwt     Publish Time: 2022-11-28      Origin: PQWT

1, the choice of pole distance: pole distance is the distance between two electrode rods. In the same underground water detector measurement point, the greater the pole distance the greater the measured potential difference, not only faster measurement speed, and the smaller the relative error, so it is best to use the instrument uniform standard pole distance 10 meters. When the measurement line is very short, in order to measure a few more points, can be changed to 5 meters. It is not recommended that the pole distance is smaller.

underground water detector

2, the choice of point distance: point distance is the distance between the two measurement points of the underground water detector, that is, the distance of each forward movement. We have said in the "skills of three", in order to facilitate the use of measuring wire instead of a ruler, point distance can choose 5 meters, 2.5 meters or 1.25 meters, it is recommended to choose more 5 and 2.5 meters, generally will not miss the anomaly. In the alluvial plain area to find sand layer water can choose a larger point distance of 10 ~ 20 meters. Find bedrock fracture water when the measurement line is very short when available 1.25 meters. (When using the tape measure is also available 1 meter).

If the first measurement of the pole distance with 5 meters, the resurvey can be encrypted, or not encrypted, if you need to encrypt the appropriate use of 2.5 meters, should not use other non-integer multiples of the point distance. If you use non-integer multiples of the point distance, the point number of the two measurements is not good correspondence.

By the same token, if we do three frequencies first, the point distance chosen is 5 meters, and then we can encrypt or not when we do multiple frequencies, if we need to encrypt, we should use 2.5 meters, and should not use other non-integer multiples of the point distance. If non-integer multiples of the point distance are used, the point numbers of the two measurements are not good correspondence.

3, the choice of the number of points: the number of points of a measurement line should not be too many, if underground water detector measurement points are too dense on the map, and there is no time for retesting, more bad analysis. Generally to 10 to 15 points is good. If the measurement line is long, the point distance should be large rather than small, in most cases should not use the point distance of 1 meter.

underground water detector

In the underground water detector profile on the display to put the map how big also depends on the number of points measured. If the number of measurement points does not exceed 10, it is appropriate to put half of the screen, if more measurement points are appropriate to put a full screen. If the number of points is very small and the screen is full, it will be very wide and flat for the horizontal anomaly, which is not intuitive. On the contrary, if there are a lot of measurement points without a full screen, it will make the horizontal anomaly very flat and unattractive.

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PQWT is a professional institution in China who engaged in the R & D, manufacturing and sales of underground water detector, water leak detector, leakage automatic analyzer, cavity detector, mine locator, dam piping detector, and borehole inspection camera. 

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