KR200180987Y1 - Seismic source bumser - Google Patents

Abstract

The present invention relates to seismic sensing, and more particularly, to a seismic wave source that is suitable for exploration of a shallow geological structure.

The present invention is fixed to the buffer handle (12) on the left and right of the outer center of the hammer 10, the stainless rod 16 is inserted into the hammer 10, and the trigger sensor 18 is built in the lower stainless rod (16) The base plate 14 is fixed.

Description

Device of seismic wave source boomer {Seismic source Bumser}

The present invention relates to seismic sensing, and more particularly, to a seismic wave source that is suitable for exploration of a shallow geological structure.

In general, when an artificial force (shock) is applied to the ground (or rock) artificially, the ground vibrates and the vibration propagates in the underground strata medium in the form of a wave. This is called 'elastic wave' in academic terms. These seismic waves propagate in the underground strata, reflecting or refracting at strata boundaries where the properties of the media (density and seismic velocity) vary, some of which are radiated underground and some are returned to the surface.

In addition, an exploration device is required for the seismic field exploration, and the exploration device is largely composed of a seismic source, a seismic generator (geophone or hydrophone), a data control device, and the like.

Conventional acoustic wave generators are classified into explosive generators and non-explosive generators. Explosive sources cause seismic waves by explosive blasting such as dynamite, and waves have the advantage of impulse-type seismic characteristics, but require permission, professional handling technicians and blasting holes for each use. There are disadvantages such as problems. As the non-explosive seismic source, a 'weight drop type' source is generally used. This includes all the seismic sources that use the vertical single force point source on the surface. The simplest technique here is to drop a heavy object from a high place using the earth's gravitational acceleration, in addition to doubling the acceleration of the object by springs or pneumatics.

Most of the central fall type generators that are currently sold in foreign countries are mounted on trucks or trailers because falling objects exceed 100 kg. These sources may be a problem of expensive purchase cost due to purchase, but most of all, domestic topographical conditions for seismic exploration are mountainous and inclined terrain, and it is fundamentally difficult to use seismic sources mounted on trucks or trailers. Therefore, there has been a demand for the development of a new seismic wave source that is relatively easy to operate the source and can efficiently transmit the seismic energy.

As a prior art, as shown in FIG. 1, the center drop type | mold generating source developed by Sweden's ABEM company is mentioned. In the above configuration, the locking device 140 connected to the locking device release switch 160 is installed outside the plastic PVC pipe 120, and the cylindrical rod hammer 100 is inserted into the locking device 140 inside the PVC pipe 120. In addition, the anti-reflection device 180 and the trigger signal coil 200 are installed at the lower part of the PVC pipe 120, and the iron plate 220 is provided at the lower part of the PVC pipe 120.

This source is designed to generate a seismic wave when a cylindrical rod (diameter of 50mm in diameter and 600mm in height) weighs about 3.5m freely in a PVC cylinder, and a reaction control medium is attached to the inner wall of the lower part of the PVC pipe. The coil is wound around the lower part of the PVC pipe to transmit the trigger signal to the measurement system, which informs the measurement point by the induced voltage when the cylindrical rod passes through the coil.

The central drop type source developed by Sweden's ABEM is configured to generate a seismic wave by freely falling down the cylindrical rod hammer 100 by pressing the locking device release switch 160 to strike the iron plate 220. If this is described in accordance with the operation sequence, first, the cylindrical pipe hammer (100) in the lying down state of the PVC pipe 120 is inserted into the PVC pipe 120 to the catching device 140, and then the PVC pipe 120 to the iron plate 220 Stand up. When all the measurement preparation is completed, press the locking device release switch 160 to allow the cylindrical hammer hammer 100 to free fall. The free-falling cylindrical rod hammer 100 transmits a signal capable of starting a measurement in the measurement system while passing through the trigger signal coil 200 and simultaneously strikes the iron plate 220 to generate an acoustic wave.

The ABEM source of seismic wave is somewhat different depending on the given exploration conditions, but because the radiated energy is small, a given exploration purpose (for example, identifying a stratum structure up to a depth of about 50 m) may be largely insufficient. In order to radiate more seismic energy, the mass of a falling object must first be increased, which requires an auxiliary device according to its operation. In other words, if the weight of the existing dropping rod (13 ㎏) greater than about 20 ㎏ (33 ㎏), first, a special auxiliary device is required in view of its operation function, and at the same time, there is a problem in that the ease of operation is greatly reduced.

The present invention has been made to solve the above problems, the purpose of which is to increase the mass of the falling object to solve the conventional problem that the seismic radiation energy is significantly less than the exploration purpose, such as the source of ABEM company It is to provide a seismic generator device that can be used in a curved lane or mountainous terrain without a small truck or trailer for operation.

Most of the central drop type generators generate a seismic wave by hitting a steel plate (support plate) with a simple hammer (approximately 5㎏) or by freely dropping heavy objects from the high place onto the support plate. Because of this, it is difficult to expect a constant seismic wave generation in terms of energy and waveform. Thus, a feature of the present invention lies in the principle of operation in which the hammer falls along a stainless rod that is fixed to the backing plate. This operating principle ensures that the contact surface between the hammer and the support plate is constant at the time of hitting, so that almost constant seismic waves can be expected and the source can be easily used even on inclined terrain.

It is also achieved by providing a device in which all components, such as a hammer, a backing plate, a stainless rod, and a cushioning handle, are gathered together to speed movement and operation thereof.

1 is a perspective view showing a source of a conventional weight drop type acoustic wave;

2 is a perspective view showing a source of the acoustic wave of the present invention

3 is an enlarged perspective view showing a hammer of the present invention

Figure 4 is an enlarged view showing the buffer handle of the present invention

5 is an enlarged view showing the support plate of the present invention

6 is an enlarged view showing a stainless rod of the present invention

<Explanation of symbols for main parts of the drawings>

(10): hammer (12): buffer handle

14: support plate 16: stainless steel rod

(18): trigger sensor 20: snap ring

(22): linear bearing 24: shackle groove

(26): top heat treatment plate (28): top heat treatment plate fixing bolt

(30): buffer spring (32): shock absorber

(34): Rubber handle (36): Loosening nut

38: Clasp 40: BNC Connector

(42): Shock plate (44): Lower heat treatment support plate fixing bolt

(46): carrying handles (48): holes

Hereinafter, the configuration and operation of the present invention with reference to the accompanying drawings.

2 is a perspective view showing a source of acoustic waves of the present invention,

3 is an enlarged perspective view showing a hammer of the present invention,

Figure 4 is an enlarged view showing a buffer handle of the present invention,

5 is an enlarged view showing a support plate of the present invention,

6 is an enlarged view showing the stainless rod of the present invention, the buffer handle 12 is fixed to the left and right center of the outer hammer 10, and the stainless rod 16 is inserted into the hammer 10 and the stainless The base plate 14 is fixed to the base plate 14 in which the trigger sensor 18 is built into the rod 16.

The hammer 10 drills a cylindrical hole 48 corresponding to the diameter of the stainless rod 16 at the center of the hammer 10 as shown in FIG. 3, and reduces the frictional resistance with the stainless rod 16. In order to install the linear bearing 22 and fix it, the upper end of the snap ring 20, the lower end of the heat treatment plate 26 is installed by the upper heat treatment plate fixing bolt 28. The upper heat treatment plate 26 is specially heat treated to minimize the damage caused by the impact with the support plate 14. On both ends of the hammer 10, a female screw for installing a plurality of buffer knobs 12 is punched out. Support plate 14 and the hammer 10 can be fixed to the lower side of both sides of the hammer 10, and the latch groove 24 for preventing the hammer 10 from hitting back is formed.

The buffer knob 12 may lift the hammer 10 and apply acceleration when the hammer 10 falls as shown in FIG. 4, and prevents the bounce upon hitting. Here, the shock absorbing spring 30 and the shock absorber 32 is installed to weaken the impact on the human body during the impact, and the rubber handle 34 is used to cushion the shock and prevent slipping. In addition, an anti-loosening nut 36 is included to prevent the buffer knob 12 from being released from the hammer 10 during use.

The support plate 14 has a heat-treated shock plate 42 is installed on the top of the support plate 14 to prevent damage of the impact caused by the hammer 10 as shown in Figure 5 and the lower heat treatment support plate fixing bolt 44 It is fixed by). Both ends of the support plate 14 is attached with a clasp 38 made of leaf springs to fix the hammer 10 and the support plate 14 when the hammer 10 is prevented from being bounced and transported as described above. .

In addition, the trigger sensor 18 is provided in a box shape at the upper side of the support plate 14, and a BNC connector 40 is installed at the both ends of the support plate 14 so as to connect the trigger signal to the outside. A carrying handle 46 is attached to facilitate the boom bottom carrying.

The stainless rod 16 has a screw groove for fixing with the support plate 14 at the bottom as shown in Figure 6 and its length is about 1.65m.

The operation of the present invention will be described with reference to the configuration as described above.

The present invention, as shown in Figure 2, the two hold the buffer knob (12) attached to both ends of the hammer 10 from both sides to lift the hammer 10 to lift up to the top of the stainless rod 16 and the hammer (10) By accelerating and hitting the backing plate 14 again, it generates elastic waves in the ground. When the hammer 10 is hit, the clasp 38 attached to the support plate 14 and the clasp groove 24 attached to the hammer 10 are locked to each other to prevent flipping and the moment of hitting the support plate 14. The attached trigger sensor 18 detects and sends a measurement start signal to the measurement system. In addition, the buffer handle 12 to minimize the impact on the human body when the hammer (10) hit.

The key focus of the present invention is that the hammer 10 falls along the stainless rod 16. This operating principle makes the base plate 14 and the constant surface of the hammer 10 contact each time when the hammer 10 hits, compared to other weight drop type seismic wave sources (e.g., hammer source, ABEM source). Seismic waves are generated relatively consistently, especially on sloped terrain, which is almost impossible at other sources.

The present invention uses a 47 kg hammer whose mass is significantly higher than the 13 kg cylindrical hammer used in the generator produced by ABEM. In addition, like ABEM's, the hammer is not simply free fall, but two people doubled and accelerated at 1.5m height, so that 47kg of the object emits more seismic energy than free fall. At this time, the buffer handle attached to the hammer so that the impact of the hammer hit hardly transmitted to the hitter. Here the hamsim design of the present invention is that the hammer was to operate along the stainless rod fixed to the support plate. Therefore, unlike the conventional source of seismic waves, not only can be operated freely on inclined terrain, but also has the advantage that the hammer can constantly hit the support plate. Even when moving the source, the hammer and the support plate are designed to be connected to each other by the latch, so only three people can move the source. That is, one person grabs the stainless rod and the other two lifts the grip handle, making it easy to move on any terrain.

The main parts of the present invention (hammer, stainless rod, backing plate, cushioning handle, etc.) are all possible to assemble, so partial replacement is easy even during exploration.

The usefulness observed through domestic field experiments of the present invention can be used in a narrow space, the installation time can be shortened and rapid movement is possible, and it can be applied even on the inclined terrain, and it is possible to transmit energy efficiently by solidifying the ground of the source location. It is a very useful design that makes it possible, and makes manufacturing and repair costs low.

Claims (3)

Support plate (14) in which the buffer handle (12) is fixed to the left and right centers of the hammer (10), the stainless rod (16) is inserted into the hammer (10), and the trigger sensor (18) is built into the bottom of the stainless rod (16). A device for a seismic wave source boom, characterized in that the fixed). The method of claim 1, The hammer 10 drills a cylindrical hole 48 in the center portion, installs a linear bearing 22 at the upper and lower ends, and heats the snap ring 20 and the upper end at each of the upper and lower ends to fix the linear bearing 22. Install the upper heat treatment plate 26 with the plate fixing bolts 28, and form the latch grooves 24 at both sides of the bottom of the hammer 10, and install the buffer knob 12 by punching the female screw in the middle both ends of the hammer 10. But The shock absorbing handle 12 is provided with a shock absorbing spring 30 and the shock absorber 32 to form a rubber handle (34) and fastening prevention nut 36 on one side, characterized in that the device of the acoustic wave source boom. The method of claim 1, The support plate 14 is fixed to the impact plate 42 with a lower heat treatment support plate fixing bolt 44 on the top, attaching the clasps 38 at both ends of the support plate 14 and the trigger sensor 18 in the upper side of the box type Installed and the BNC connector 40 is installed on the trigger sensor 18, the device of the acoustic wave source boom, characterized in that the carrying handle 46 is attached to both ends of the side of the support plate (14).