Wheel detector

Abstract

The present invention provides a wheel-type detector, which relates to the field of seismic exploration technology; the wheel-type detector includes a wheel body, a detector mechanism and a data processing mechanism; the wheel body is provided with a first cavity; the detector mechanism is installed and fixed in the first cavity and is used to detect seismic waves; the data processing mechanism is connected to the detector mechanism, and the data processing mechanism receives the electrical signal detected by the detector mechanism and converts the electrical signal into seismic wave data. The present invention uses a wheel body to replace the existing ship-type or iron shoe-type detector. When collecting seismic signals on hardened road surfaces, since rolling friction is much smaller than sliding friction, it is easier to move and arrange the detector, and can achieve rapid arrangement of multiple large arrays, greatly improving the layout efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of seismic exploration devices, and in particular to a wheel-type geophone device. Background Art

[0002] Seismic exploration is a geophysical exploration method that uses the propagation law of elastic waves in underground media to find out the underground geological conditions. Seismic detector is the most basic and important data acquisition device in seismic exploration. In order to couple with the ground, the traditional seismic detector needs to insert the plug of the detector into the soil.

[0003] With the progress of urbanization, more and more seismic exploration is carried out in urban environments. Since hardened roads cannot be used to bury geophones, coupling bases are often used. In order to ensure the coupling effect with the hardened ground, the geophone coupling base must have sufficient weight, which leads to a large workload for geophone construction and layout, making the work efficiency extremely low. In addition, due to the large weight of the coupled geophone, it is not easy to move. Even if the geophone coupling base is designed to be a ship-shaped or iron shoe-shaped that is conducive to towing, the friction to be overcome during towing is also large, which not only limits the length of the arrangement, but also the huge tension on the towing cable poses a safety hazard during construction. Summary of the invention

[0004] The object of the present invention is to provide a wheel-type geophone device to solve the problems of existing geophones such as large layout workload, low efficiency, and difficulty in mobility.

[0005] In order to solve the above technical problems, the present invention provides a wheel-type detector device, and the specific technical solution is as follows:

[0006] A wheel-type detector device comprises a wheel body, a detector mechanism and a data processing mechanism; a first cavity is arranged in the wheel body; the detector mechanism is installed and fixed in the first cavity and is used to detect seismic waves; the data processing mechanism is connected to the detector mechanism, the data processing mechanism receives the electrical signal detected by the detector mechanism and converts the electrical signal into seismic wave data.

[0007] Furthermore, the detection mechanism includes a plurality of detection cores, and the plurality of detection cores are arranged at intervals along the circumference of the first cavity.

[0008] Furthermore, the length direction of the detector core intersects with the outer contour line of the wheel body at an intersection, and the length direction of the detector core is perpendicular to the tangent line at the intersection.

[0009] Furthermore, the plurality of detection cores are evenly spaced and arranged.

[0010] Furthermore, the multiple detection cores include a first detection core, a second detection core, a third detection core and a fourth detection core arranged in a clockwise direction; the length directions of the first detection core and the third detection core are both located on a first straight line, the length directions of the second detection core and the fourth detection core are both located on a second straight line, and the first straight line and the second straight line are perpendicular to each other.

[0011] Furthermore, it also includes a gravity sensing mechanism, which is installed in the wheel body; the gravity sensing mechanism is connected to the data processing mechanism, and the gravity sensing mechanism is used to determine whether each of the detection cores is located below or above the center of the wheel body. When it is detected that the detection core is located below the center of the wheel body, the first signal is output to the data processing mechanism; when it is detected that the detection core is located above the center of the wheel body, the second signal is output to the data processing mechanism; the data processing mechanism derives seismic wave data based on the first signal, the second signal and the electrical signals detected by each of the detection cores.

[0012] Furthermore, the gravity sensing mechanism includes a plurality of gravity sensing structures, and the plurality of gravity sensing structures are matched with the plurality of detector cores in a one-to-one correspondence and are used to detect whether the corresponding detector core is located below or above the center of the wheel body.

[0013] Furthermore, the gravity sensing mechanism is provided with a second cavity filled with a conductive liquid; the gravity sensing structure includes contacts located on two side walls of the second cavity, and when the conductive liquid is located between two contacts, the two contacts are conductive.

[0014] Furthermore, the volume of the conductive liquid is half of the second cavity.

[0015] Furthermore, the direction of the line connecting the contact point and the center of the circular side wall is consistent with or parallel to the length direction of the detection core.

[0016] The wheel-type geophone device provided by the present invention uses a wheel body to replace the existing ship-type or iron shoe-type geophone. When collecting seismic signals on a hardened road surface, since rolling friction is much smaller than sliding friction, it is easier to move and arrange the geophones, and rapid arrangement of multiple large arrays can be achieved, greatly improving the arrangement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a wheel detector provided in an embodiment of the present invention.

[0019] icon:

[0020] 1-wheel body; 11-first cavity;

[0021] 2-detection mechanism; 21-first detection core; 22-second detection core; 23-third detection core; 24-fourth detection core;

[0022] 3- gravity sensing mechanism; 31- second cavity; 32- conductive liquid; 33- first contact; 34- second contact; 35- third contact; 36- fourth contact. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Based on the problems in the background technology, it can be known that since the existing detectors inevitably produce friction with the hardened road surface during movement, and the weight of the detectors is large, it causes problems such as inconvenient movement of the detectors and low deployment efficiency. In view of this, this embodiment provides a wheeled detector, which improves the original rolling friction into rolling friction, and realizes convenient movement of the detector by reducing friction.

[0027] Specifically, combined with Figure 1 As shown in the figure (the direction of the arrow on the detector core in the figure is its own length direction), the wheel-type detector device of this embodiment includes a wheel body 1, a detector mechanism 2 and a data processing mechanism (not shown in the figure); wherein, a first cavity 11 is provided in the wheel body 1 of this embodiment, and the inner contour of the first cavity 11 is the same as the outer contour of the wheel body 1 and is cylindrical, except that the size of the first cavity 11 is slightly smaller than the outer contour of the wheel body 1. The material of the wheel body 1 of this embodiment can be the same as or similar to the main body material of the existing boot-type or ship-type detector, such as metal or rubber material, as long as it does not affect the detection of the detector.

[0028] The detection mechanism 2 of this embodiment is installed and fixed in the first cavity 11, and is used to detect seismic waves. Since the wheel body 1 of this embodiment is in a rolling state, adaptive structural improvements can be made to the detection mechanism 2. The specific improvements are given below.

[0029] The data processing mechanism of the present embodiment is connected to the detection mechanism 2, and the connection method can be a wireless signal connection or a wired signal connection. The data processing mechanism of the present embodiment receives the electrical signal detected by the detection mechanism 2 and converts the electrical signal into seismic wave data; the data processing mechanism of the present embodiment may include a circuit board and an operation circuit connected to the circuit board. Since the structures of both are common knowledge to technical personnel in this field, this embodiment does not make a specific description and illustration of the specific structural form, working principle and circuit layout of the data processing mechanism.

[0030] Based on the above structure, in order to better detect elastic waves, the detection mechanism 2 of this embodiment includes a plurality of detection cores, which are existing detection sensors. The plurality of detection cores are arranged at intervals along the circumference of the first cavity 11. The detection mechanism 2 of this structure ensures that no matter where the wheel body 1 rotates, there is always a detection core that is close to the ground to ensure the accuracy of the detection. Moreover, in order to ensure that the detection mechanism 2 of this embodiment has a stable detection function no matter what state the wheel body 1 rotates to, this embodiment arranges the plurality of detection cores at even intervals, that is, the spacing between the two detection cores or the length of the arc between the two detection cores is the same, and the arc can be understood as a part of the outer contour of the wheel body or a part of the inner contour of the first cavity 11.

[0031] As a preferred implementation of this embodiment, the length direction of the detection core of this embodiment intersects with the outer contour line of the wheel body 1 at an intersection, and the length direction of the detection core is perpendicular to the tangent at the intersection. This structural design takes into account that the operation circuit needs to combine the vector sum of signals collected by multiple detection cores during operation. Arranging the detection core in this way is conducive to the judgment and calculation of the operation circuit.

[0032] Specifically, the multiple detection cores of this embodiment include Figure 1 The first detection core 21, the second detection core 22, the third detection core 23 and the fourth detection core 24 are shown in the figure and are arranged clockwise; wherein, the length directions of the first detection core 21 and the third detection core 23 of this embodiment are both located on the first straight line and pass through the center of the outer contour of the wheel body 1 or the inner contour of the first cavity 11, and the length directions of the second detection core 22 and the fourth detection core 24 of this embodiment are both located on the second straight line, the first straight line and the second straight line are perpendicular to each other, and both pass through the center of the outer contour of the wheel body 1 or the inner contour of the first cavity 11, that is to say, the first detection core 21, the second detection core 22, the third detection core 23 and the fourth detection core 24 are not only consistent with the radial direction of the outer contour of the wheel body 1 or the inner contour of the first cavity 11 in length direction, but also the two relative detection cores are axially symmetrically arranged.

[0033] In addition, since the calculation circuit needs to combine the vector sum of signals collected by multiple detection cores during operation, and the data detected by the detection core located above the center of the wheel body 1 is obviously different from the data detected by the detection core located below the center of the wheel body 1, it is necessary to distinguish the data detected by the detection core above the center of the wheel body 1 and the data detected by the detection core below the center of the wheel body 1. Therefore, in order to obtain whether the detection core is located above the center of the wheel body 1 or below the center of the wheel body 1, the wheel detector of this embodiment also includes a gravity sensing mechanism 3. The gravity detection sensing mechanism of this embodiment is installed in the wheel body 1, and the gravity sensing mechanism 3 is connected to the data processing mechanism, and the connection method can be a wired signal connection or a wireless signal connection.

[0034] The gravity sensing mechanism 3 of this embodiment is used to determine whether each detection core is located below or above the center of the wheel body 1. When it is detected that the detection core is located below the center of the wheel body 1, a first signal is output to the data processing mechanism, specifically, the electrical signal generated by the detection core at this position is positive; when it is detected that the detection core is located above the center of the wheel body 1, a second signal is output to the data processing mechanism, specifically, the electrical signal generated by the detection core at this position is negative; the data processing mechanism of this embodiment obtains seismic wave data based on the first signal, the second signal and the electrical signals detected by each detection core, specifically, the vector sum of the positive and negative signals is calculated through an operation circuit as the output of the entire device.

[0035] like Figure 1 In the state shown, the first detection core 21 and the second detection core 22 of this embodiment are located above the center, and the third detection core 23 and the fourth detection core 24 are located below the center. The electrical signal generated by the first detection core 21 is recorded as s21, the electrical signal generated by the second detection core 22 is recorded as s22, the electrical signal generated by the third detection core 23 is recorded as s23, and the electrical signal generated by the fourth detection core 24 is recorded as s24. The calculation steps are:

[0036] In the first step, the two pairs of core signals are scalar-summed to obtain two signals S1 = s(23 + (-s21); S2 = s24 + (-s22);

[0037] In the second step, the vector sum S0 of the two sets of signals S1 and S2 with orthogonal directions is calculated, S0=sqrt(S12+S22), and S0 is the final output signal.

[0038] The gravity sensing mechanism 3 of this embodiment includes a plurality of gravity sensing structures, which are matched with a plurality of detector cores in a one-to-one correspondence and are used to detect whether the corresponding detector core is located below or above the center of the wheel body 1 .

[0039] The gravity sensing mechanism 3 of this embodiment has various structural forms. For example, corresponding sensors are placed near each detection chip, that is, the gravity sensing structure is a sensor, and the sensor can be a gravity sensor or an angular velocity sensor, etc. However, this structure is relatively expensive and the overall structure is relatively complex. In view of this, this embodiment designs a new gravity sensing mechanism 3 using the principle of liquid flow under the action of gravity.

[0040] Specifically, combined with the attached Figure 1 As shown, the gravity sensing mechanism 3 of this embodiment is provided with a second cavity 31, which is also a cylindrical structure, and is filled with a conductive liquid 32; each gravity sensing structure of this embodiment includes contacts located on the two circular side walls of the second cavity 31, and when the conductive liquid 32 is located between the two contacts, the two contacts are connected, and the contacts are connected to the data processing mechanism and the circuit board of the data processing mechanism. When the two contacts are connected, a closed loop is formed with the circuit board, and a detection signal can be sent to the operation circuit. At this time, the operation circuit determines that the vector detected by the detection chip corresponding to the two contacts is positive. Specifically, the conductive liquid 32 of this embodiment can be any existing electrolyte solution with good conductivity.

[0041] Based on the above-mentioned four detection cores, the gravity sensing mechanism 3 of this embodiment includes two first contacts 33, two second contacts 34, two third contacts 35 and two fourth contacts 36. The two first contacts 33 are used to detect whether the first detection core 21 is located above or below the center of the wheel body 1, the two second contacts 34 are used to detect whether the second detection core 22 is located above or below the center of the wheel body 1, the two third contacts 35 are used to detect whether the third detection core 23 is located above or below the center of the wheel body 1, and the two fourth contacts 36 are used to detect whether the fourth detection core 24 is located above or below the center of the wheel body 1. The same applies when the number of detection cores changes.

[0042] In order to ensure the accuracy of detection by the gravity sensing mechanism 3, the volume of the conductive liquid 32 of this embodiment is half of the second cavity 31, or the conductive liquid 32 fills half of the volume of the second cavity 31, and the direction of the line connecting the contact and the center of the circular side wall is designed in this embodiment to be consistent with or parallel to the length direction of the detection core, so that the rotation angle of the contact and its corresponding detection core and the angle formed with the ground are always consistent.

[0043] In summary, according to the wheel-type geophone device provided in this embodiment, the wheel body 1 is used to replace the existing ship-type or iron shoe-type geophone. When collecting seismic signals on a hardened road surface, since the rolling friction is much smaller than the sliding friction, it is easier to move and arrange the geophone, and the rapid arrangement of multiple large arrays can be achieved, which greatly improves the layout efficiency.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wheel-type detector, characterized in that: It includes a wheel body, a detection mechanism and a data processing mechanism; A first cavity is provided in the wheel body; The detection mechanism is installed and fixed in the first cavity and is used to detect seismic waves; The data processing mechanism is connected to the detection mechanism, and the data processing mechanism receives the electrical signal detected by the detection mechanism and converts the electrical signal into seismic wave data; The detection mechanism comprises a plurality of detection cores, and the plurality of detection cores are arranged at intervals along the circumference of the first cavity; The length direction of the detector core intersects with the outer contour line of the wheel body at an intersection, and the length direction of the detector core is perpendicular to the tangent line at the intersection; The plurality of detection cores are evenly spaced and arranged; Also included is a gravity sensing mechanism, wherein the gravity sensing mechanism is installed in the wheel body; The gravity sensing mechanism is connected to the data processing mechanism, and the gravity sensing mechanism is used to determine whether each of the detector cores is located below or above the center of the wheel body. When it is detected that the detector core is located below the center of the wheel body, the first signal is output to the data processing mechanism; when it is detected that the detector core is located above the center of the wheel body, the second signal is output to the data processing mechanism; the data processing mechanism obtains seismic wave data based on the first signal, the second signal and the electrical signals detected by each of the detector cores; The gravity sensing mechanism includes a plurality of gravity sensing structures, which are matched with a plurality of detector cores in a one-to-one correspondence and are used to detect whether the corresponding detector core is located below or above the center of the wheel body.

2. The wheel-type detector device according to claim 1, characterized in that: The plurality of detection cores include a first detection core, a second detection core, a third detection core and a fourth detection core arranged in a clockwise direction; The length directions of the first detection core and the third detection core are both located on a first straight line, the length directions of the second detection core and the fourth detection core are both located on a second straight line, and the first straight line and the second straight line are perpendicular to each other.

3. The wheel-type detector device according to claim 1, characterized in that: The gravity sensing mechanism is provided with a second cavity, the second cavity is filled with a conductive liquid, and a plurality of the gravity sensing structures are arranged at intervals along the circumference of the second cavity; The gravity sensing structure includes contacts located on two circular side walls of the second cavity. When the conductive liquid is located between the two contacts, the two contacts are conductive.

4. The wheel-type detector device according to claim 3, characterized in that: The volume of the conductive liquid is half of the second chamber.

5. The wheel-type detector device according to claim 3, characterized in that: The direction of the line connecting the contact point and the center of the circular side wall is consistent with or parallel to the length direction of the detection core.

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