Automatic measuring system for geological exploration drilling depth

Abstract

Disclosed is a geological exploration drilling depth automatic measuring system, comprising a base station installed on the top of a drilling machine and a tag installed on the active rod of the drilling machine, the base station and the tag both having ranging sensors for measuring downward distance, the tag following the active rod to perform rod lowering and rod lifting actions, wherein during the rod lowering and rod lifting actions of the active rod, when the tag reaches a wave trough from the base station, it is counted as completing one rod lifting action, the length of each rod during the rod lifting action is calculated according to the distance data of the ranging sensors of the base station and the tag, and then the actual hole depth is obtained by accumulating the lengths of all the rods during the rod lifting actions. The system can automatically calculate the drilling depth without affecting the normal exploration process.

Description

Technical Field

[0001] This invention relates to an automatic measurement system for borehole depth in geological exploration. Background Technology

[0002] Measuring borehole depth during geological exploration is a key aspect of exploration management and a crucial indicator for assessing whether the borehole has met design requirements. Currently, the method primarily relies on manually measuring the drill rod length and then calculating the total drill rod length by subtracting the excess length of the drill string above ground. This traditional method suffers from low levels of informatization and is cumbersome. Summary of the Invention

[0003] This invention provides an automatic borehole depth measurement system for geological exploration, which can automatically calculate the borehole depth without affecting the normal exploration process.

[0004] According to one aspect of the present invention, an automatic borehole depth measurement system for geological exploration is provided, including a base station installed on the top of the drilling rig and a tag installed on the active rod of the drilling rig. Both the base station and the tag have a distance measuring sensor for measuring downward distance. The tag follows the active rod in raising and lowering the rod. During the raising and lowering of the active rod, a lifting action is counted when the distance between the tag and the base station reaches a trough. The rod length data of each rod during the lifting process is calculated based on the distance data of the distance measuring sensors of the base station and the tag. Then, the actual borehole depth is obtained by accumulating the rod lengths of all lifting actions.

[0005] In some examples, the tag records the distance measurement value of each pole and the time of pole lifting, and transmits it to the base station.

[0006] In some examples, the tag and the base station interact via Bluetooth.

[0007] In some examples, the base station transmits data to a server, which then counts the number and length of all the lifting rods.

[0008] In some examples, the base station transmits data to the server via a mobile network.

[0009] In some examples, the base station has a GPS or BeiDou positioning module.

[0010] This invention utilizes a tag mounted on the top of a drilling rig, combined with a base station to measure the absolute distance between the tag and the base station, to quickly calculate the borehole depth. The measured data is then transmitted wirelessly to a backend cloud server. Compared to traditional manual measurement, this method offers advantages such as faster borehole depth measurement, higher accuracy, greater information integration, and less interference with the exploration process. It is applicable to various scenarios and features strong anti-interference capabilities, high transmission speed, extremely wide bandwidth, large system capacity, low transmission power, and good confidentiality. With wide-ranging applications, convenience, reliability, and cost savings, it possesses promising prospects for widespread application and significant economic benefits. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0012] Figure 1 This is a schematic diagram of the base station and tag installation of an automatic measurement system for borehole depth in geological exploration provided in an embodiment of the present invention.

[0013] Figure 2 This is a label block diagram provided in an embodiment of the present invention.

[0014] Figure 3 This is a base station block diagram provided in an embodiment of the present invention. Detailed Implementation

[0015] An automatic measurement system for borehole depth in geological exploration includes tags and base stations. For example... Figure 1 As shown, the base station is installed on the top of the drilling rig for positioning, distance data collection, and data transmission; the tag is installed on the drilling rig's main boom and follows the boom's raising and lowering actions to measure flight time.

[0016] like Figure 2 As shown, the labels include power management system, human-machine interface panel, IMU, radio, Bluetooth, ANT, and high-precision ranging sensor. Figure 3 As shown, the base station includes a power management system, a human-machine interface panel, a GPS or Beidou satellite positioning module, an IMU, a radio, 4G, Bluetooth, ANT, and a high-precision ranging sensor.

[0017] The power management system manages the power supply to the tags and base stations. The human-machine interface panel enables the automatic borehole depth measurement system for geological exploration, including power on / off and sleep modes, satellite positioning display, audio output, and measurement data display. The inertial navigation IMU measures the attitude of the borehole tags and base stations in real time. In situations of unstable network communication, the radio enables the borehole tags to connect to a local reference base station for positioning. Bluetooth facilitates interaction between the base station and tags in the automatic borehole depth measurement system.

[0018] This invention simulates the lifting process of a drilling machine by measuring the distance changes between the tag and the base station. The base station is located at the top of the drilling machine, and the tag is fixed to the active rod, with an initial distance D between them. When the active rod is lowered and raised, the tag moves with it. When the active rod is lowered to the bottom, it is considered that the tag has reached a trough, generating a relative distance S. Therefore, by first measuring the distance between the tag and the base station, when the distance between the tag and the base station reaches a trough, the system defaults to completing the lifting of one rod. The rod length data is recorded and stored, and the actual hole depth is obtained by accumulating all rod lengths.

[0019] UWB technology itself can correspond to multiple tags for one base station, but this application uses one tag for one base station.

[0020] UWB Measurement Principle: The two-way time-of-flight (TW-TOF) method is the ranging algorithm used in the UWB technology for hole depth measurement in this invention. This algorithm is an optimization and subdivision of the TOF algorithm, eliminating the adverse effects on ranging accuracy in the TOF algorithm. It can achieve centimeter-level positioning accuracy, meeting the measurement error range for hole depth measurement. The algorithm principle is described as follows:

[0021] Both the tag and the base station generate an independent timestamp from the moment they are activated. Device A (UWB tag device) transmits a request-type pulse signal at its timestamp Ta1, and device B (UWB base station device) transmits a response-type signal at time Tb2, which is received by device A at its own timestamp Ta2. The flight time of the pulse signal between the two modules can then be calculated, thereby determining the flight distance S.

[0022] S = Cx[(Ta2-Ta1)-(Tb2-Tb1)] / 2 (C is the speed of light).

[0023] After the tag is activated, if it is in an unpaired state, it will update its Bluetooth broadcast packet, randomly generating a new PAN ID. Simultaneously, it will send a Bluetooth pairing request signal to the base station to pair with the base station's Bluetooth module. Once paired, it will send the newly generated PAN ID information to the base station via Bluetooth broadcast, placing the tag and base station in the same PAN group. This completes the ranging communication between the tag and base station, allowing the next step of the calibration and lifting process to proceed. If the tag is already paired, there is no need to reassign a PAN ID. The tag will wake up the base station via Bluetooth and communicate with the paired base station for ranging, proceeding to the next step of the calibration and lifting process.

[0024] After the base station and the tag communicate via Bluetooth ranging, the initial distance value between the tag and the base station (calibration value) is calibrated. The end of the ordinary pole is the calibration position. The calibration value is obtained and recorded to the base station, which saves the data.

[0025] Then the pole lifting begins. The tag records the distance measurement value and lifting time of each pole and transmits it to the base station. After receiving the response, the base station saves the data and returns a signal to the tag. When the distance between the tag and the base station completes one cycle, the system defaults to completing the lifting of one pole and starts the next cycle until the lifting is finished.

[0026] After the poles are raised, the base station will report the data to the algorithm engine via the 4G module. The algorithm engine will then count the number and length of all the poles raised and calculate the total length. The engine is configured on a server.

[0027] When network communication is unstable, the internal radio is used for the hole-measuring tag to connect to the local reference base station for positioning.

[0028] The BeiDou + 4G positioning and transmission system actively connects to the backend server to upload measurement data and supplementary data in real time. The WiFi also supports AP mode, allowing connection reception from other devices and providing parameter configuration and data export functions. When there is no network signal or a weak network signal, the storage management system automatically saves the exploration and measurement information data, which can be exported at any time and resumed once the network is restored.

Claims

1. An automatic measurement system for borehole depth in geological exploration, characterized in that, The system includes a base station installed on top of the drilling rig and a tag installed on the rig's main boom. Both the base station and the tag have distance sensors that measure downward distance. The tag follows the main boom during boom lowering and raising movements. During these movements, a boom raising action is considered complete when the distance between the tag and the base station reaches a trough. The length of each boom during the raising process is calculated based on the distance data from the distance sensors of the base station and the tag. The actual hole depth is obtained by summing the lengths of all boom raising actions. The drilling depth is measured using the UWB measurement principle, employing two-way time-of-flight distance measurement. The tag records the distance value and raising time of each boom and transmits this data to the base station. The base station transmits its own and the tag's distance data to a server. The server then counts the number and length of all booms raised.

2. The automatic measurement system for geological exploration borehole depth according to claim 1, characterized in that, The tag and the base station interact via Bluetooth.

3. The automatic measurement system for geological exploration borehole depth according to claim 1, characterized in that, The base station transmits data to the server via the mobile network.

4. The automatic measurement system for geological exploration borehole depth according to claim 1, characterized in that, The base station is equipped with a GPS or BeiDou positioning module.

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