DQL100-G1J Instruction Manual

DQL100-G1J Instruction Manual for the Mine Laser Suspension Compass

Product Implementation Standard: Q/HGY21-2017

Q/HGY06-2020

• Uses of the instrument

The instrument is primarily used for measuring the magnetic azimuth and the dip angle of the guide line of a compass in secondary roadways of the mining area and on the coal-mining face. With the addition of a laser collimation device, measurements can be extended by means of beam projection.

DQL100-G1J The mining laser suspended compass is composed of DQL100-G1 Installation of an additional suspended compass for the mine type FD-1J It is composed of a laser-based positioning system. This solution addresses the limitation of traditional plumb-bob compasses, which rely on visual estimation for azimuth measurement and thus cannot guarantee accuracy. Moreover, when conducting surveys in high-risk environments such as mine shafts, crosscuts, and stopes, laser technology can replace the traditional plumb line, thereby ensuring the safety of survey personnel while enhancing operational efficiency.

• Basic Parameters

• Compass instrument

1. Magnetic needle length              100mm
2. Minimum scale division of the dial        1 degree
3. Estimated value              30 ′
4. Instrument weight            450g

• Laser mount

1. Reference value accuracy            < 30 ′
2. Spot diameter      In 20m The spot diameter at the location shall not exceed 15mm
3. Power supply voltage      Battery-powered 3V

Battery specification model:   Lithium-manganese battery ER17335 3.6V

(4) Accessory weight 200g( With battery )

( Three ) Slope gauge

(1) Outer diameter 200mm

(2) Minimum grid value 20 minutes

(3) Accessory weight            50g

III. Instrument Structure

DQL100-G1J Mining Laser Suspension Compass ( See Figure 1. ) Composed of a laser mounting assembly, 2 Compass box set, 3 Ring frame assembly, 4 The bent-arm bracket assembly consists of a compass box assembly, a circular ring frame assembly, and a bent-arm bracket assembly, which together form a universal support that enables the compass box assembly to remain balanced in any direction.

Laser rack assembly and curved bracket assembly, through 1-3V The type assembly surface is assembled to the upper end of the hook on the bent-arm bracket assembly, consisting of four 1-2 A set screw secures the two components, forming a mine laser suspension compass with laser orientation. ( Hereinafter referred to as the Hanging Compass. )。

IV. Instructions for Use

The end of the magnetic needle wrapped with copper wire is the south pole.

The compass is suspended and supported by a plumb line for guidance, with visual centering and leveling performed. Then the reading is taken.

After tightening the surveying rope, first use a slope gauge to level it or measure the inclination angle, then hang the compass to determine the magnetic azimuth; by comparing with the data in the appendix, the true north azimuth can be calculated. For convenient reading, during measurement the compass should be hung so that 2-1 Align the zero end of the dial with the test target.

When measuring in environments where it is inconvenient to pull the rope, the laser can be turned on. 1-1 Button switch, through 1-4 Laser line extension measurement.

In the figure: 1 Laser mounting assembly, 2 Compass box set, 3 Ring frame assembly, 4 Curved-arm bracket assembly, 1-1 Push-button switch, 1-2 Tighten the screws, 1-3 V Mold assembly surface, 1-4 Laser line, 2-1 Dial, 2-2 Steering wheel, 2-3 Magnetic needle

When the slope on the survey line is steep and impedes horizontal alignment, the step method should be used to divide the measurement into segments, with careful effort made to ensure that the measuring tape in each segment remains parallel to the horizontal plane.

If magnetic materials near the measurement point exert an influence, the cross-azimuth method shall be employed to eliminate this effect: place the instrument at the measurement point and conduct directional measurements in both directions from the point.

As shown in Figure 2. O ₁、 O ₂、 O ₃ As a measurement point.

To minimize the influence of magnetic conductors, during measurements we use the minimum distance between certain objects and the suspended compass as a reference parameter:

Railway to Hanging Compass 1.5 meters

Mine cart to hang the compass 2–2.6 meters

Iron pipe to hanging compass 0.5 meters

Mine lamp to hanging compass 0.5 meters

V. Precautions

( One ) To facilitate measurement, the compass box assembly is included. 2-2 The inscription on the steering wheel : The “east” and “west” directions are opposite to the geographic directions.

( Two ) The laser mount assembly belongs to 3R For laser-like products, do not look directly at the laser beam to avoid eye injury.

VI. Inspection and Maintenance of Instruments

( One ) Inspection :

(1) The magnetic needle of the suspended compass shall have sufficient sensitivity. The sensitivity test for the magnetic needle involves suspending the compass several times on the same measuring rope; each time the reading is taken, the difference between successive readings shall not exceed ± 0.5 °, The reduction in the magnetic needle’s sensitivity may be due to blunting of the pivot on which the needle is supported, weakening of the needle’s magnetism, or the ingress of dust and dirt into the instrument; the user should perform maintenance as appropriate based on the specific situation.

(2) When the compass box of the suspended-compass assembly is in a horizontal position, the magnetic needle should also be horizontal. During angle measurement, the needle must be balanced and remain horizontal. To achieve this balance, the position of the copper wire at one end of the needle can be adjusted to ensure equilibrium.

(3) The scale dial inside the compass box is marked with engraved numerals. 0 degree ~180 The diameter of the degree scale should coincide with the direction in which the suspension cord of the hanging compass is aligned. If, upon inspection, it is found that the diameter of the scale on the compass box does not align with the suspension cord, all readings will differ from the true value by a constant offset. To verify this, the hanging compass is suspended twice: first with the zero end facing forward, and then the reading is 180 °Forward; at this point, the two readings should differ by 180 °. If this is not the case, the arithmetic mean must be calculated from the readings taken at two positions on the dial. Furthermore, in all subsequent measurements, each instrument reading must be taken twice. When calculating the arithmetic mean, the second reading must be either added to or subtracted from the first. 180 °, in order to obtain the same magnetic azimuth.

(4) Laser Mount and Articulating Arm Bracket V The mating surfaces of the type shall fit tightly and must not be loose or V The two mating surfaces of the assembly are not evenly and firmly abutted. If this occurs, the fastening screws should be adjusted to ensure secure and stable alignment.

(5) When the laser’s brightness is insufficient and the battery needs to be replaced, a lithium battery should be used. - Manganese dioxide battery CR123A 3.0V 1500mAh( Certified as intrinsically safe )。

( Two ) Maintenance

(1) The compass should not be placed in damp environments or in locations with excessively high temperatures; if necessary, a suitable amount of desiccant may be placed inside the instrument case to absorb moisture.

(2) When the compass is not in use, the magnetic needle must be supported by the brake pin to prevent unnecessary wear on the pivot tip.

(3) Over time, the interior of the compass may become dirty; in such cases, the glass cover can be removed. Use a soft-bristled brush to gently sweep away surface dust, or carefully wipe the surface with a clean, fine cotton cloth. Avoid excessive rubbing to prevent the graduations and lettering from becoming blurred and damaging the instrument.

(4) When using or carrying the compass, prevent impacts and any other collisions that could damage the instrument.

(5) After use, the compass should be stored in a wooden cabinet, and it is recommended that the magnetic poles of the compass needle be aligned with the geomagnetic poles, so as to preserve the needle’s magnetism for a long time.

VII. Appendices

(1) Instrument box          1 one

(2) Spring clip          2 one

(3) Instruction manual          1 portion        

(4) Slope gauge          1 shelf

(5) Certificate of Product Conformity      1 portion

VIII. Appendix

Harbin Optical Instruments Factory Co., Ltd.

HARBIN OPTICAL INSTRUMENT FACTORY LTD.

ground   Address: Jingwei Third Road, Daoli District, Harbin City 32 Number

Post   Editor: 150010

Electricity   Words: 400-030-0319         0451-84286338      

network   Address: www.hrboptical.com           

E-mail： hopt@hopt.cn