DQL-4 type 51 type geological compass

The proportion of mileagemeasurement: 1:25000,1:75000
1:100000,1:50000

meter reading error : Is smaller than 1.25 DEG
dial: Lattice valued 1 degrees
weight: 0.15kg
size : 68 x 63 x 26 (mm)

details

A , use
in five - compass is the determination of position, distance, level, slope (pitch angle), a simple measurement of equipment height, mileage and mapping map is simple, easy to use at night, in the corresponding position is coated with luminous powder.
two, simple structure: the
instrument is mainly composed of a compass and odometer is composed of two parts, such as (Figure 1). Some compass ring (1), a dial (2)
, in the dial seat row has two lines, the outer ring is 360 reticle system, time line is 1 degrees. The inner ring (6000 mil) divided
, are carved 300 lines, each line value of 20 (MIL). A needle (3), a goniometer (4), the pitch angle of the
partition unit, each line is 2.5 degrees, can measure the pitch angle of 60 degrees. The odometer (8) is mainly composed of odometer, measuring
(9), wheel gear, pointer etc.. The mileage divided 1:25000, 1:50000, 1:75000, 1:100000 four
scale scale value. 1:100000 scale of each corresponding line on behalf of 1 km, 1:50000 line moment corresponding representative 0.5 male
, and 1. has provided 2 ring disc seat 3 needle 4 goniometer 5 needle plate 6 plate 7 reflector 8 odometer 9 measured with the use of
round 10. a 11 sight 12 assessment 13 foot. Should the proportion or double the proportion of map. The side of the
instrument foot, two for distance assessment. It is two from the tip of 12.3 mm, with the front sight sight between the
length is 123 mm, which is 10 times the length of the tip. The
three, using the method of
(1) the
1: the determination of position determination in the southeast northwest
(1) open the compass, the azimuth alignment index "delta" "0"; the
(2) rotating compass needle, to refer to the North alignment after "0", that is referring to the direction of the north, in the range of glass
can directly read the East and south, West and North direction. The 2
calibration map orientation map orientation is the use of compass makes the position on the map and in the same direction. The
(1) to open the instrument, adjusting the dial, the range of indicators "delta" alignment "0"; the
(2) to mapping and map foot radial tangent true; the
(3) rotation map, the northernmost point in this region the values of magnetic declination on it on the map location and site orientation completely consistent. The determination of the magnetic azimuth
3 magnetic azimuth
A the determination of the target map of the angle of the
(1) map with compass calibration accuracy, and maintain fixed map; the
(2) will foot with the point and the target point of tangency, adjusting disc seat, the index of "delta" at the moment "0"
crossed ; the
(3) after the needle stationary, its northern end refers to the magnetic azimuth scale is the base point to the target point angle. The
magnetic bearing B determination to target the angle of the
(1) open the instrument, the azimuth alignment index "delta" and "0", the reflector and the dial holder slightly at an angle of 45 degrees; the
(2) provided with a thumb inserted, Ping holding apparatus, from sight to sight is geodesic target; the
(3) from the reflective mirror at the northern tip of the needle dial pedestal at the division, which is to target the magnetic azimuth angle value. The
(two) the
1 by measuring the distance map distance measuring ruler mapping directly with the
2 pictures on the distance of the distance measurement
(1) the red pointer to "0"; the
(2) Ping holding apparatus, the odometer measuring wheel gently in
starting point and along the route taken by the volume roll forward to the end point;
(3) according to a pointer in the scale on the line, you can directly read out the corresponding distance field. For example, in the
map 1:50000 traffic from a point to point B, instrument dial 1:50000 refers to the scale of 14 lines, the distance between two points is a field
from 7 km. If the map in the 1:100000 amount of 14 lines, and the distance between two points is 14 kilometers. In addition
, with a corresponding proportion of (such as 1:25000) or double the proportion (such as 1:20000 and 1:500000) of the map can be converted into the amount of
reading. The distance

instrument the 3 assessed by the distance is roughly determined to target distance assessment on two tip for the sight of the interval and sight distance between 1 / 10, the similar triangle relationship can
determination to target distance. The
(1) the two known target (object) distance and point, for the two target (object) between the interval, the following formula can be used: the
between two target interval = two target and the standing point of the distance between * 1 / 10 *
open instrument, with the eye close to the light quasi, target, such as the two target (object) is assessed from the two point (Figure 2
clip), and between the two known target point and the point where the distance is 100 meters, two target points between the interval is 100 * 1 / 10 =
10 meters, according to the this calculation method. The
in front of two target (object) intervals not just distance assessment two point clamped and smaller or larger than
spacing, can use the following formula: the
two target interval = two goals and where the distance between * 1 / 10 x two goals for the two cases of multiple
tip interval: known two goals and standing point of the distance between 100 meters, measured two target intervals for distance assessment two
tip spacing 7 / 10, two inter target interval is 100 x 1 / 10 x 7 m / 10 = 7. The
also, if the interval between the two targets for distance assessment two tip interval 1.5 times, two target interval is 100 x 1 / 1
0 x 1.5 = 15 meters. The
(2) between the two known object width or the distance of the target, find the target point and the distance between the interval
the following formula can be used to compute the :
stand the distance between the target and the known target X 10 = the
cases: known in front of two between the target interval is 12 m, just as two point sighting distance assessment, target point and standing point
distance between 12 * 10=120 M. The
in known target intervals, but in sight, less than or greater than two tip distance assessment interval, the following formula can be used: the
goal and point distance = target interval of the actual * 10 goals for distance assessment two tip of the interval between the number of times the
note using distance assessment method to target distance is simple, but the accuracy is not high.
(three) determination of inclined slope (pitch angle) the
open instrument, make mirror and dial a slightly 45 degrees, the side holding apparatus, to aim at the side slope along the sight, sight, and the
sight line parallel with the slope, let freedom swing angle measuring device, gaze angle measuring device the central line indicating the pitch angle scale
on partition from the reflective mirror, shall be for the pitch angle (slope). The
(four) measurement of target height the
roughly known object (object) and the horizontal distance between the point and pitch angle of targets are first determined, and then check the height of table (see table 1), you can learn the target height, the method is as follows: 1 by the
map or assessed by the distance for the point to be measured and the target (such as the peak, chimney, spire etc.) the horizontal distance between the 2
; The side holding apparatus, aiming to target the top along the sight, sight, let freedom swing angle measuring device to stop, see the pitch angle protractor reticle
value indicated by the 3 view;
altimeter (Schedule 1) or with a formula that can highly. The
: Cases of known points to the measured horizontal distance of 100 meters, with the instrument measured pitch angle is 30 degrees, and then check the altimeter,
100 meters in the horizontal alignment of 30 degrees vertical lattice, Richard measured height of 57.74 meters. Maintenance and maintenance of the
instrument: four, the 1 placed
instrument not near the ferromagnetic material, so as to avoid the loss of magnetic. The
is not available 2 foot tapping objects, so as not to affect the accuracy of measurement. The
3 mirrors do not twist, so as not to affect the aiming and reading division, keep the surface clean, do not wipe with a dirty cloth, hand. The 4
instrument should not shut down into the box, do not pay attention to the collision.