Field calibration device for earthquake monitoring station

Abstract

The utility model relates to the technical field of earthquake monitoring, and discloses an earthquake monitoring station field calibration device comprising a supporting seat; the rotating disc is rotationally connected to the supporting seat, and a pointer is arranged on the rotating disc; the supporting seat is located on the peripheral side of the rotating disc and provided with a dial, the dial is provided with scale marks, and the pointer points to the scale marks; the north seeker is mounted on the rotating disc, the north seeking direction of the north seeker is the same as the direction of the pointer, and the north seeker and the pointer rotate synchronously. According to the utility model, the north seeker is arranged on the rotating disk, the north seeker can determine the true north direction value of an attached carrier by measuring the rotation angular velocity of the earth, the process is not interfered and influenced by an external magnetic field or other environments, the north seeker and the pointer synchronously rotate, and when the orientation direction of the pointer is true north direction, the north seeker and the pointer are in real north direction. A seismometer may be mounted in this direction. Therefore, the installation precision of the seismometer is improved, manual operation errors are reduced, and the precision of earthquake monitoring and early warning is improved.

Description

Technical Field

[0001] This utility model relates to the field of earthquake monitoring technology, and in particular to an on-site calibration device for earthquake monitoring stations. Background Technology

[0002] Earthquake monitoring relies on the precise detection and in-depth analysis of seismic waves, with the installation accuracy of seismometers being a key factor determining the reliability of monitoring results. In areas with frequent seismic activity and at stations undertaking important monitoring tasks, efficient and accurate earthquake monitoring and early warning technologies are of immeasurable significance in protecting people's lives and property and reducing earthquake disaster losses.

[0003] Currently, the calibration techniques used by earthquake monitoring stations have significant shortcomings. Taking the north-finding operation during seismometer installation as an example, since seismometers themselves cannot perform north-finding, they often rely on compasses during installation. In areas with complex and varied terrain, such as mountainous regions and canyons, compasses are easily affected by the surrounding magnetic field, leading to directional deviations. Furthermore, these traditional devices, due to their low accuracy, are highly susceptible to human error during actual operation, which can affect the final accuracy of the seismometer installation. These problems directly lead to deviations in earthquake monitoring data, thereby affecting the accuracy of earthquake monitoring and early warning.

[0004] In summary, existing equipment severely restricts the accurate positioning of seismometers. To effectively improve earthquake monitoring capabilities, developing a high-precision measurement and easy-to-operate on-site calibration device for earthquake monitoring stations has become a critical task urgently needing to be addressed in the field of earthquake monitoring technology. Utility Model Content

[0005] The present invention aims to provide an on-site calibration device for earthquake monitoring stations to overcome the shortcomings mentioned above.

[0006] In order to achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A field calibration device for earthquake monitoring stations, comprising:

[0008] Support base;

[0009] Rotate a rotating disk connected to the support base, the rotating disk being equipped with a pointer;

[0010] Located on the periphery of the rotating disk, a scale is provided on the support base, the scale has graduation lines, and the pointer points to the graduation line; and

[0011] A north-finding instrument is mounted on the rotating disk. The north-finding direction of the instrument is the same as that of the pointer, and they rotate synchronously.

[0012] Furthermore, the support base is provided with a locking element, which locks the rotating disk in a releasable manner.

[0013] Furthermore, the locking element includes:

[0014] A support plate located on the periphery of the rotating disk and fixedly connected to the support base;

[0015] A first screw is located in the radial direction of the rotating disk and is threadedly connected to the support plate. A locking block is fixedly connected to one end of the first screw near the rotating disk. The locking block is selectively connected to the rotating disk to achieve locking.

[0016] Furthermore, a first knob is fixedly connected to the end of the first screw away from the rotating disk.

[0017] Furthermore, the locking element includes:

[0018] A rotating shaft is fixedly connected coaxially to the rotating disk, and the rotating shaft is rotatably connected to the support base;

[0019] The worm gear splinedly connected to the rotating shaft; and

[0020] A worm gear is rotatably connected within the support base, and the worm gear meshes with a worm wheel for transmission.

[0021] Furthermore, one end of the worm gear is fixedly connected to a second knob through the support base.

[0022] Furthermore, it also includes an infrared laser emitter fixedly connected to the rotating disk, the infrared laser emitter being capable of emitting a laser parallel to the north-finding direction of the north-finding instrument.

[0023] Furthermore, a level bubble is provided on the support base and / or the rotating disk.

[0024] Furthermore, the support base is provided with several support legs that can be raised and lowered.

[0025] Furthermore, the support leg shown includes:

[0026] Several threaded sleeves are fixed vertically through the support base;

[0027] The second screw, whose upper end is threadedly connected to the threaded sleeve; and

[0028] A support pad is fixedly connected to the lower end of the second screw, and the support pad, the second screw, and the threaded sleeve are arranged in a one-to-one correspondence.

[0029] Compared with the prior art, this utility model has at least the following advantages:

[0030] This invention utilizes a north-finding instrument mounted on a rotating disk. This instrument determines the true north direction of the attached carrier by measuring the Earth's rotational angular velocity. This process is unaffected by external magnetic fields or other environmental interference. The north-finding instrument rotates synchronously with the pointer. When an angle exists between the pointer and the true north direction, the instrument displays this angle. By observing the pointer and the scale lines, the rotation angle of the rotating disk can be accurately determined, aligning the pointer with the true north direction. The direction the pointer points at this point is the true north direction, along which a seismograph can be installed. This effectively improves the installation accuracy of the seismograph, reduces human error, and enhances the precision of earthquake monitoring and early warning. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the earthquake monitoring station field calibration device of this utility model;

[0033] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the earthquake monitoring station field calibration device of this utility model;

[0034] Figure 3 This is a cross-sectional view of Embodiment 2 of the earthquake monitoring station field calibration device of this utility model.

[0035] Reference numerals in the attached diagram: 1. Support base; 2. Rotating disk; 3. Pointer; 4. Scale dial; 5. Scale line; 6. North finder; 7. Support plate; 8. First screw; 9. Locking block; 10. First knob; 11. Rotating shaft; 12. Worm gear; 13. Worm; 14. Second knob; 15. Infrared laser emitter; 16. Level bubble; 17. Threaded sleeve; 18. Second screw; 19. Support pad. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Example 1:

[0039] Reference Figure 1 This invention provides a field calibration device for seismic monitoring stations, aiming to solve the problems of low accuracy and susceptibility to environmental interference during the installation of seismometers in the prior art. The device includes a support base 1, a rotating disk 2, a scale disk 4, and a north-finding instrument 6. The support base 1 is circular or square, with several support feet at the bottom for stability. The rotating disk 2 is rotatably connected to the support base 1 at its top center. The rotating disk 2 is a circular metal disk, rotatably connected to the support base 1 via bearings. A pointer 3 is mounted on the side wall of the rotating disk 2, fixed to it, with its end pointing to a scale line 5 on the scale disk 4. The scale disk 4 is annular and fixed to the support base 1, located around the periphery of the rotating disk 2. The surface of the scale disk 4 has 360 evenly distributed scale lines 5, each corresponding to 1 degree, used to indicate the rotation angle of the rotating disk 2. The north finder 6 is mounted on the rotating disk 2 and uses a high-precision dual-axis dynamic tuning gyroscope. It determines the true north direction of the attached carrier by measuring the Earth's rotation angular velocity. This process is not affected by external magnetic fields or other environments. The north finder 6 is aligned with the pointer 3, and the north finder 6 and pointer 3 can rotate synchronously.

[0040] In addition, the support base 1 of this utility model is also provided with a locking member, which is used to lock the rotating disk 2 in a releasable manner, so as to achieve a relatively stationary state between the locking member and the support base 1 when the rotating disk 2 stops rotating.

[0041] Specifically, the locking component includes a support plate 7, a first screw 8, and a locking block 9. The support plate 7 is located on the periphery of the rotating disk 2 and is fixedly connected to the support base 1 by welding. The first screw 8 is located radially on the rotating disk 2, passing through the support plate 7 and threadedly connected to it. The end of the first screw 8 closest to the rotating disk 2 is fixedly connected to the locking block 9, which is made of rubber and is used to contact the rotating disk 2 to achieve locking. The end of the first screw 8 furthest from the rotating disk 2 is fixedly connected to a first knob 10 for easy manual operation.

[0042] In addition, this utility model is also provided with an infrared laser emitter 15, which is fixed on the rotating disk 2 and emits a laser beam parallel to the north-finding direction of the north-finding instrument 6 for auxiliary calibration.

[0043] To ensure the north-finding instrument 6 is level, a level bubble 16 is provided on the support base 1 and / or rotating disk 2 of this invention for adjusting its levelness. In a specific embodiment of this invention, the support base 1 and the rotating disk 2 are arranged in parallel, with the rotating disk 2 located above the support base 1. A level bubble 16 is installed on the rotating disk 2, and the north-finding instrument 6 is installed above the rotating disk 2.

[0044] Optionally, to facilitate the horizontal adjustment of the support base 1, the support base 1 of this invention is provided with three support feet, which can achieve a lifting effect. Specifically, the support feet include a threaded sleeve 17, a second screw 18, and a support pad 19. The threaded sleeve 17 is fixedly inserted through the support base 1 in the vertical direction. The upper end of the second screw 18 is threadedly connected to the threaded sleeve 17, and the lower end is fixedly connected to the support pad 19. The support pad 19 is used to contact the ground and provide stable support.

[0045] The support feet are height-adjustable to adapt to different terrains, ensuring stable installation of the device in complex environments.

[0046] The usage method of this embodiment is as follows:

[0047] Determine north using a compass, set pointer 3 to the 0-degree mark and point it north, then place support 1 on the seismic monitoring station, adjust the height of its support feet to keep support 1 horizontal, and confirm the horizontal state of the device using level bubble 16.

[0048] Turn on the power of the North Finder 6. The North Finder 6 displays the deviation angle between pointer 3 and true north at this time.

[0049] By using the scale line 5 on the scale 4, confirm the rotation angle of the rotating disk 2, drive the rotating disk 2 to rotate, and ensure that the pointer 3 points in the same direction as due north.

[0050] Rotating the first knob 10 pushes the first screw 8 to move towards the rotating disk 2, causing the locking block 9 to contact and lock the rotating disk 2. The cooperation between the rotating disk 2 and the scale 4 visually displays the rotation angle. The locking mechanism is simple in design, easy to operate, and reduces human error.

[0051] Turn on the infrared laser emitter 15 to emit a laser beam parallel to the north-finding direction of the north-finding instrument 6. Draw the installation mark through the laser beam. This direction is the installation direction of the seismometer.

[0052] Example 2:

[0053] The difference between this embodiment and Embodiment 1 is that the structure of the locking component is different.

[0054] Reference Figure 2-3A rotating shaft 11 is coaxially fixedly connected to the lower surface of the rotating disk 2. The rotating shaft 11 is rotatably connected to the support base 1 via bearings. A worm gear 12 is splinedly connected to the rotating shaft 11. A worm 13 is rotatably connected inside the support base 1. The worm 13 meshes with the worm gear 12 for transmission. One end of the worm 13 passes through the support base 1 and is fixedly connected to a second knob 14. The knob is engraved with anti-slip texture. By rotating the worm 13, the worm gear 12 can be driven to rotate, thereby achieving the effect of driving the rotating shaft 11 and the rotating disk 2 to rotate synchronously. The worm gear 12 and the worm 13 have a self-locking function, which can achieve relative stillness between the rotating disk 2 and the support base 1 when the worm 13 stops rotating.

[0055] The usage method of this embodiment is as follows:

[0056] Determine north using a compass, set pointer 3 to the 0-degree mark and point it north, then place support 1 on the seismic monitoring station, adjust the height of its support feet to keep support 1 horizontal, and confirm the horizontal state of the device using level bubble 16.

[0057] Turn on the power of the North Finder 6. The North Finder 6 displays the deviation angle between pointer 3 and true north at this time.

[0058] By using the scale line 5 on the scale 4, the rotation angle of the rotating disk 2 is confirmed. By rotating the worm gear 13, the rotating disk 2 is rotated to ensure that the pointer 3 points in the same direction as due north.

[0059] Turn on the infrared laser emitter 15 to emit a laser beam parallel to the north-finding direction of the north-finding instrument 6. Draw the installation mark through the laser beam. This direction is the installation direction of the seismometer.

[0060] Through the above structural design and operation method, the present invention can effectively solve the problems of low north-finding accuracy and complicated operation in the installation process of seismometers in the prior art, and provide a high-precision and easy-to-operate field calibration device for seismic monitoring stations.

[0061] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0062] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A field calibration device for earthquake monitoring stations, characterized in that, include: Support base (1); Rotate the rotating disk (2) connected to the support base (1), and the rotating disk (2) is provided with a pointer (3); Located on the periphery of the rotating disk (2), a scale (4) is provided on the support base (1), and scale lines (5) are provided on the scale (4). The pointer (3) points to the scale lines (5). A north finder (6) is mounted on the rotating disk (2). The north finder (6) has the same north finder direction as the pointer (3) and rotates synchronously.

2. The on-site calibration device for earthquake monitoring stations according to claim 1, characterized in that, The support base (1) is provided with a locking member, which locks the rotating disk (2) in a releasable manner.

3. The on-site calibration device for earthquake monitoring stations according to claim 2, characterized in that, The locking element includes: A support plate (7) located on the periphery of the rotating disk (2) and fixedly connected to the support base (1); A first screw (8) is located in the radial direction of the rotating disk (2) and is threadedly connected to the support plate (7). A locking block (9) is fixedly connected to one end of the first screw (8) near the rotating disk (2). The locking block (9) is selectively connected to the rotating disk (2) to achieve its locking.

4. The on-site calibration device for earthquake monitoring stations according to claim 3, characterized in that, The first screw (8) is fixedly connected to a first knob (10) at the end away from the rotating disk (2).

5. The on-site calibration device for earthquake monitoring stations according to claim 2, characterized in that, The locking element includes: A rotating shaft (11) is fixedly connected to the rotating disk (2) on the same axis, and the rotating shaft (11) is rotatably connected to the support base (1); The worm gear (12) splinedly connected to the rotating shaft (11); and The worm (13) is rotatably connected in the support (1), and the worm (13) meshes with the worm wheel (12) for transmission.

6. The on-site calibration device for earthquake monitoring stations according to claim 5, characterized in that, One end of the worm gear (13) passes through the support base (1) and is fixedly connected to a second knob (14).

7. The on-site calibration device for earthquake monitoring stations according to claim 1, characterized in that, It also includes an infrared laser emitter (15) fixedly connected to the rotating disk (2), the infrared laser emitter (15) being able to emit a laser parallel to the north-finding direction of the north finder (6).

8. The on-site calibration device for earthquake monitoring stations according to claim 1, characterized in that, A level bubble (16) is provided on the support base (1) and / or the rotating disk (2).

9. The on-site calibration device for earthquake monitoring stations according to claim 8, characterized in that, The support base (1) is provided with several support legs that can be raised and lowered.

10. The on-site calibration device for earthquake monitoring stations according to claim 9, characterized in that, The support legs shown include: Several threaded sleeves (17) are fixed vertically through the support base (1); The second screw (18) is threaded to the upper end of the threaded sleeve (17); and A support pad (19) is fixedly connected to the lower end of the second screw (18), and the support pad (19), the second screw (18) and the threaded sleeve (17) are arranged in a one-to-one correspondence.

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