Laser north alignment instrument for seismometer installation

Abstract

The utility model belongs to the technical field of inspection and detection, and discloses a seismometer installation laser north alignment instrument which comprises a base, the bottom of the base is concaved inwards to form an installation groove, an opening of the installation groove faces downwards, a limiting cross beam is arranged on the top wall of the installation groove, and limiting grooves are concavely formed in the left side and the right side of the installation groove respectively. Two mounting holes are vertically formed in the base in a penetrating manner, a laser transmitter is arranged in each mounting hole, a plurality of fixing holes are horizontally formed in the base, fixing screws are mounted in the fixing holes, at least one fixing screw is connected with one laser transmitter in an abutting manner, and at least one fixing screw is connected with the other laser transmitter in an abutting manner. According to the seismometer installation laser north alignment instrument, two laser emitters are adopted, the principle that a straight line is determined by two points is utilized, a base is placed on a lifting handle of a seismometer, linear laser emitted by the laser emitters and an azimuth datum line marked on the ground completely coincide, and north alignment is completed.

Description

Technical Field

[0001] The utility model belongs to the technical field of inspection and detection, and particularly relates to a laser north-aligning instrument for installing a seismometer. Background Art

[0002] The orientation of a seismometer is crucial to ensuring accurate recording of earthquake vibrations. During installation, it's important to consider the instrument's orientation to correctly capture the north-south, east-west, and vertical vibrations of earthquake waves.

[0003] The typical installation method for a seismometer is to use a compass or north finder to draw a north-south datum line in the center of a pre-set mounting surface on a concrete base. This datum line runs north-south and indicates geographic north. The seismometer is then placed on the horizontal base with the directional arrow pointing toward geographic north. The seismometer is then moved so that the two north-south azimuth screws on the base align with the azimuth line on the base.

[0004] However, in the process of realizing the present invention, the inventors discovered that there are at least the following problems in the prior art: such an installation method usually results in a large azimuth error, which affects the quality of seismic observation data, and brings errors or even mistakes to seismic waveform analysis, magnitude, and earthquake location, thus limiting the research and understanding of seismic phenomena. Utility Model Content

[0005] The present invention aims to solve the above technical problems at least to a certain extent. To this end, the present invention aims to provide a laser north-pointing instrument for installing a seismometer.

[0006] The technical solution adopted by this utility model is:

[0007] A seismometer-mounted laser northing instrument comprises a base, the bottom of the base is concave to form a mounting groove, the opening of the mounting groove faces downward, a limiting crossbeam is provided on the top wall of the mounting groove, and limiting grooves are respectively recessed on the left and right sides of the mounting groove; two mounting holes are vertically through-through provided on the base, each of which is provided with a laser emitter, and a plurality of fixing holes are horizontally provided on the base, fixing screws are installed in the fixing holes, at least one fixing screw abuts against one of the laser emitters, and at least one fixing screw abuts against the other laser emitter.

[0008] Preferably, telescopic parts are provided on the opposite side walls of each limiting groove, the telescopic parts are slidably installed in the base, a slide cylinder is provided in the base, a slide rod is provided on the telescopic part, the slide rod is movably installed in the slide cylinder, and a spring is provided on the periphery of the slide cylinder and the slide rod, and the two ends of the spring are in contact with the telescopic part and the base respectively.

[0009] Preferably, the sides of the two telescopic members arranged opposite to each other are respectively a vertical surface and a slope surface from top to bottom, and the vertical surface is provided with anti-skid grooves horizontally. The bottom of the limiting beam is provided with an anti-skid pad.

[0010] The beneficial effects of the utility model are:

[0011] By adopting the laser northing instrument for installing a seismometer provided by the utility model, there is no need to separately design a direction cone on the seismometer. The laser northing instrument for installing a seismometer adopts two laser emitters and uses the principle of two points determining a straight line. The base is placed on the handle of the seismometer. The linear laser emitted by the laser emitter and the azimuth reference line marked on the ground are completely overlapped to complete the northing, which can solve the installation problem and improve the installation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a stereoscopic diagram of a seismometer equipped with a laser north-aligning device.

[0013] Figure 2 It is a cross-sectional view of a laser north-pointing instrument installed on a seismometer according to the utility model.

[0014] Figure 3 This is another cross-sectional view of the utility model seismometer equipped with a laser north-aligning device.

[0015] In the figure: 1-base; 2-mounting slot; 3-limiting beam; 4-limiting groove; 5-laser emitter; 6-fixing screw; 7-telescopic part; 8-slide; 9-slide rod; 10-spring; 11-anti-slip pad. DETAILED DESCRIPTION

[0016] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention and are not to be construed as limiting the present invention. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in a variety of different configurations.

[0017] In the present invention, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, and it can be the internal connection of two components.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] The laser northing device installed in a seismometer of this embodiment is suitable for a seismometer with a handle on the top, such as Figure 1 、 Figure 2 and Figure 3 As shown, the laser north-aligning instrument for mounting a seismometer includes a base 1, the bottom of the base 1 is concave to form a mounting groove 2, the opening of the mounting groove 2 faces downward, a limiting beam 3 is provided on the top wall of the mounting groove 2, and limiting grooves 4 are respectively recessed on the left and right sides of the mounting groove 2. The limiting grooves 4 can be well stuck on the handle of the seismometer to match the north direction of the seismometer; the limiting beam 3 and the two limiting grooves 4 are on the same plane, so the base 1 can be well placed on the handle of the seismometer.

[0020] Two mounting holes are vertically provided on the base 1, and a laser emitter 5 is provided in each mounting hole. Four fixing holes are horizontally provided on the base 1, and two fixing holes are provided on one side of each mounting hole. Fixing screws 6 are installed in the fixing holes, two of which are in contact with one of the laser emitters 5, and two fixing screws 6 are in contact with the other laser emitter 5, thereby fixing the laser emitter 5 in the mounting hole; the laser emitter 5 is of existing technology, with a switch on the laser emitter and a replaceable button battery in the laser emitter. The laser emitter converts the point-shaped laser into a line through the internal lens, and the laser emitter emits linear laser downward.

[0021] The laser northing instrument for installing a seismometer uses two laser transmitters and uses the principle of two points determining a straight line. The base 1 is placed on the handle of the seismometer. The linear laser emitted by the laser transmitter and the azimuth reference line marked on the ground completely coincide with each other, completing the northing process and improving the installation accuracy of the seismometer in the north direction.

[0022] Each of the two opposing side walls of the limiting groove 4 is provided with a telescopic member 7, which is slidably mounted within the base 1. A slide 8 is provided within the base 1, and a slide rod 9 is provided on the telescopic member 7. The slide rod 9 is movably mounted within the slide 8. The slide 8 and the slide rod 9 cooperate to guide the movement of the slide 8. A spring 10 is provided around the periphery of the slide 8 and the slide rod 9, and the two ends of the spring 10 are in contact with the telescopic member 7 and the base 1, respectively. The two oppositely arranged telescopic members approach each other under the action of the spring. When the limiting groove is clamped on the handle of the seismometer, the telescopic member is pushed and the spring is compressed, so that the telescopic member presses against the handle with a certain pressure, which can prevent the base 1 from loosening. By providing the telescopic member, the limiting groove can be adapted to handles of different sizes of different seismometers.

[0023] The side surfaces of the two telescopic parts 7 that are arranged opposite to each other are respectively a vertical surface and a sloped surface from top to bottom. The sloped surface facilitates the handle to enter between the two telescopic parts. The vertical surface is provided with anti-slip grooves horizontally, which can increase the friction between the telescopic parts and the handle; the bottom of the limiting beam 3 is provided with an anti-slip pad 11, which can increase the friction between the top of the handle and the limiting beam 3, and further prevent the base 1 from shifting and loosening.

[0024] The present invention is not limited to the above-mentioned optional implementation methods. Anyone can derive various other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that falls within the scope defined by the claims of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A laser north-aligning device for a seismometer, characterized by: The invention comprises a base (1), the bottom of the base (1) is concave to form a mounting groove (2), the opening of the mounting groove (2) faces downward, a limiting beam (3) is provided on the top wall of the mounting groove (2), and limiting grooves (4) are respectively concave on the left and right sides of the mounting groove (2); two mounting holes are vertically provided on the base (1), each mounting hole is provided with a laser emitter (5), a plurality of fixing holes are horizontally provided on the base (1), fixing screws (6) are installed in the fixing holes, at least one fixing screw (6) abuts against one of the laser emitters (5), and at least one fixing screw (6) abuts against another laser emitter (5).

2. The laser north-aligning instrument for seismometer installation according to claim 1, characterized in that: Each limiting groove (4) is provided with a telescopic member (7) on the opposite side walls. The telescopic member (7) is slidably installed in the base (1). A slide cylinder (8) is provided in the base (1). A slide rod (9) is provided on the telescopic member (7). The slide rod (9) is movably installed in the slide cylinder (8). A spring (10) is provided on the periphery of the slide cylinder (8) and the slide rod (9). The two ends of the spring (10) are in contact with the telescopic member (7) and the base (1) respectively.

3. The laser north-aligning instrument for seismometer installation according to claim 2, characterized in that: The side surfaces of the two telescopic members (7) arranged opposite to each other are respectively a vertical surface and a slope surface from top to bottom, and anti-slip grooves are horizontally arranged on the vertical surface.

4. The laser north-aligning instrument for seismometer installation according to any one of claims 1 to 3, characterized in that: An anti-slip pad (11) is provided at the bottom of the limiting crossbeam (3).

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