Do you know MEMS north seeker for mining and drilling?

With the development of inertia technology into our vision, north seeker is an important branch of the development of inertia technology, the broad application field determines its future huge market, this article mainly discusses the specific application of north seeker in mining drilling.

The traditional optical fiber north finding equipment is an instrument based on inertial technology, which has high accuracy and automation, and meets the measurement needs of coal mine, but its high cost limits the application and promotion of this product in coal mine. Therefore, it is urgent to find a low cost drilling directional equipment that can meet the accuracy requirements. Based on the above practical problems in production, a new type of mining north seeker based on MEMS technology is developed and the prototype test is carried out to check the indicators, so as to meet the actual needs of the project.

Drilling hole measurement parameters mainly include azimuth Angle and inclination angle. At present, the middle-line method of translation roadway, which is often used, needs to use a straight ruler and Angle measuring instrument, etc., which has complicated operation, long measurement time and poor accuracy. For the special application in the coal mine, in order to ensure the actual measurement accuracy of the drilling rig, we must take into account the cost, development difficulty and other comprehensive conditions, and the coal mine construction drilling field space is small, the instrument must be convenient to install and disassemble, so the structure and size of the instrument must be small, but at the same time to meet the requirements of battery size and capacity.

1.The basic introduction of Ericco's new north seeker

In response to the above construction environment and actual needs, Ericco inertial system today launched a new MEMS mining north seeker ER-MNS-09, achieving a breakthrough in the appearance and size of the traditional north seeker. Its size is 110mm xΦ30mm, weight ≤150g, angle measurement range of -90° to 90°, can be in a smaller diameter, in a wider full temperature range, accurate output of angular rate information and acceleration information.

2.The north finding system composition

This north finding system can provide strong support for customers to solve the azimuth Angle, attitude Angle, position and other information. Secondly, it can complete the initial alignment and attitude holding functions, and output the carrier attitude reference value in real time. It mainly includes three-axis MEMS gyroscope and three-axis MEMS accelerometer, data acquisition and its professional navigation software, which can provide the position and attitude information of the carrier movement.

The two inertial sensors are installed according to the three positive directions of the carrier coordinate system. The three-axis MEMS gyro is used to measure the angular velocity components of the three axes of the carrier motion relative to the inertial coordinate system. Three-axis acceleration component. The system mainly uses the strapdown attitude matrix to complete the linear acceleration component. The strapdown attitude matrix is used to complete the coordinate transformation, and the linear acceleration along the three axes of the carrier coordinate system is transformed into the linear acceleration along the three axes of the navigation coordinate system, and the velocity and position parameters of the carrier are obtained by solving. The angular velocity component along the three axes of the carrier coordinate system is converted into the angular velocity component along the three axes of the navigation coordinate system, and the attitude parameters of the carrier are obtained by solving.

Conclusion

This technical research is based on the system analysis of the MEMS three-axis mine north seeker newly released by Ericco in mining, which reduces the cost of traditional FOG north seeker. In addition, the use of MEMS north finder can more accurately grasp the inclination and azimuth changes of the borehole, easy to grasp the distribution of the blank zone outside the control range of the borehole, in order to take targeted supplementary measures. More information about north finder, welcome to discuss with us!