The mine-use intrinsically safe drilling trajectory measurement instrument utilizes triaxial magnetosensitive components to measure the azimuth and inclination of the probe tube. It also employs triaxial accelerometers and advanced hardware and software calibration algorithms to calibrate and calculate a wide range of inclination angles. This ensures accurate inclination and azimuth data even in extremely harsh environments. The instrument uses the principle of photoelectric encoding to measure the distance the probe tube travels within the drill hole. Combining these two functions accurately reveals the spatial trajectory of the entire drill hole.

The instrument is highly integrated, compact, lightweight, and offers high measurement accuracy and stability. It can operate wirelessly for self-measurement and data storage, making it simple and convenient. Additionally, it can be advanced using a specially designed guidance and propulsion device, enhancing its versatility. The probe tube has a small diameter, making it suitable for drill holes with smaller diameters. Due to its excellent performance, it leads among similar products.

1 Applications:

Suitable for precise measurement of drilling trajectories and depths in all drill holes with a diameter of over 30mm, including horizontal, vertical, and inclined holes, without iron casings. The main functions are as follows:

• Measurement of drilling trajectories for geological exploration holes, gas drainage holes, water probing holes, and grouting reinforcement holes.
• Measurement of drilling direction and directional drilling accuracy.
• Precise measurement of drilling trajectories for tunnel alignment.

2 Main Technical Features:

• Explosion-proof type: Mine-use intrinsically safe type.
• Enclosure protection: IP54, with good waterproof, dustproof, and shockproof performance.
• Measurement point control: Can be set arbitrarily by time or depth, automatically measuring inclination, azimuth, and depth values.
• Operating mode: Wireless operation.
• Propulsion method: The probe tube can be connected to a drill rod or advanced using a specially designed guidance and propulsion device.

3 Main Technical Specifications:

• Inclination measurement range: ±90°.
• Inclination accuracy: 0.1° (for angles <15°), 0.2° (for angles <30°), 0.3° (for angles <60°), 0.5° (for angles <90°). Resolution: 0.01°.
• Azimuth accuracy: 0.3°. Resolution: 0.1°.
• Probe roll angle allowance: 360°.
• Depth accuracy: 0.5mm. Resolution: 0.1mm.
• Probe diameter: Φ25mm.
• Communication interface: Bluetooth.
• Storage capacity: 4GB, capable of storing data from 2000 drill holes.
• Operating temperature: -10°C to +65°C.
• Rated operating voltage: 3.6V, operating current: <70mA.
• Power supply: Both the main unit and the probe tube use rechargeable lithium battery packs, with continuous operation time of no less than 20 hours.
• Dimensions: Main unit approximately 215×164×52mm, probe tube Φ25×800mm.
• Weight: Main unit ≤2.5kg, probe tube ≤5kg.