Maximum measuring range: 450m
Min measuring inside diameter: 70mm (standard DN90 PE tube)
Application scenario: power pipeline, municipal pipeline, gas pipeline
DT-GXY-300D is an important product in our fifth generation pipeline inertial measurement instrument products, specially designed to adapt to the power pipeline, can be well adapted to the internal diameter of 70mm (considering the height of the weld scar and the actual curvature, direct calibration DN90 HDPE pipe) above the pipeline, at the same time, it has a shorter body, It can overcome the disadvantages of the actual working conditions such as small bending and poor welding, and greatly improve the passability of the power pipeline measurement.
More accurate measurement: three consecutive years than the measurement accuracy;
Smaller size: measurable DN90 PE tube;
Longer endurance: more than 12 hours of single endurance;
More complete functions: can locate the weld, can calculate the curvature of the pipeline;
More stable operation: not afraid of weld impact, more adaptable;
The algorithm is more intelligent: back and forth, short stay can be successfully solved;
More convenient connection: integrated direct connection, get rid of cable trouble;
The interaction is more intimate: the original U disk and key interaction are not restricted by the working space.
Instrument type | DT-GXY-300P | DT-GXY-300D | DT-GXY-300C | DT-GXY-300B | DT-GXY-300A |
range | unlimited | 0-450m | 0-350m | 0-650m | unlimited |
Measurement accuracy * | level:±(0.15+0.06%D) | level:±(0.20+0.15%D) | level:±(0.25+0.20%D) | level:±(0.20+0.15%D) | level:±(0.15+0.10%D) |
elevation:±(0.10+0.03%D) | elevation:±(0.15+0.10%D) | elevation:±(0.20+0.10%D) | elevation:±(0.15+0.10%D) | elevation:±(0.10+0.05%D) | |
* 1)D=L-100m;LFor pipe length,L≤100m時,D=0; | |||||
2) The above is the accuracy of the final result, which is obtained by fitting no less than 6 measured tracks conforming to "plane dispersion ≤0.2% and elevation dispersion ≤0.1%". | |||||
Fit pipe diameter * | 80-600mm | 70-400mm | 70-400mm | 70-400mm | 80-600mm |
* 1) The above dimensions refer to the inner diameter of the pipe; | |||||
2) In the actual measurement, the inner coil height and pipe curvature should be considered. | |||||
3) Support for larger diameter needs to be customized。 | |||||
Endurance time | >8 Hours | >12 Hours | |||
Storage capacity | 2Gb(Continuous storage duration >6 Hours) | ||||
Data interface | AtypeUSB2.0 | ||||
Main engine size | 364*Φ67mm | 260*Φ55mm | 340*Φ52mm | 340*Φ52mm | 340*Φ63mm |
Main engine weight | 2.0Kg | 1.1Kg | 1.35Kg | 1.35Kg | 1.65Kg |
Class of protection | IP68 | IP68
|
For the pipeline line measurement of trenkless pipe jacking construction, conventional electromagnetic pipeline instrument, ground penetrating radar and other instruments are limited by many factors such as electromagnetic interference, pipe material, buried depth of the pipeline, etc., which may easily lead to unsuccessful or discontinuous measurement, unable to obtain a complete three-dimensional attitude trajectory of the pipeline, and very low construction efficiency, especially in the measurement application of river crossing pipelines. These instruments are even more hopeless. The pipeline 3D attitude measuring instrument based on the principle of inertial measurement is to obtain its motion trajectory through professional calculation of the measurement of physical information such as angular velocity, inclination Angle and acceleration during its operation. As long as its motion trajectory coincides with the pipeline, the three-dimensional attitude quantity distributed underground in the pipeline can be obtained. It is not affected by external electromagnetic and pipe material, buried depth and other factors, and continuous measurement, high measurement accuracy.
Field condition
The measured gas pipeline is a medium pressure natural gas pipeline connection project of a gas company in Fujian Province. The pipeline material is 20#3PE reinforced anticorrosion steel pipe φ610, the length of the pipeline is 735 meters. According to the guidance measurement results during construction, the depth of the pipeline is more than 30 meters
。
Measurement process
According to the site situation, we prepared a DT-GXY-200 host, a GNSS RTK set of auxiliary measuring equipment suitable for the center line positioning at both ends of the pipeline, 2 electric winches, 4 engineering surveying personnel, and carried out 3 round-trip measurements (the actual demand only 1-2 times), which took 1.5 hours (traction speed of about 1m/s).
Measurement data analysis
The total length of the pipeline is 733.98m (related to the sampling point interval), the buried depth is 31.38m, the three measurement track lines are basically the same, and the maximum space spacing of the three track lines is 2.52m, which basically conforms to the nominal accuracy of the instrument. From the comparison of the three measurements, since the inertial measurement unit is a gravity sensitive element, and the time bias (course deviation becomes larger with the increase of time) is significant, so in the traction process, the impact on the instrument should be minimized during the measurement process, followed by the allowable traction speed range, the measurement time should be minimized, especially for long distance pipelines.
Call
South China and Central China Service Hotline:
13928860524East China and North China service hotline:
17727764409After-sales service:
18102594604