KR20030086783A - A pressing and fitting device for the precise aquisition of seismic reflection signals in tunnel - Google Patents

Abstract

PURPOSE: A sensor compression device for measuring accurately a reflective signal of an elastic wave within a tunnel is provided to reduce the loss of energy by controlling the tensile force of a plate spring and a coil spring. CONSTITUTION: A sensor compression device for measuring accurately a reflective signal of an elastic wave within a tunnel includes a plate spring(1), a coil spring(2), a support plate(5), a sensor(3), a coil spring guide(4), a fixing bolt(6), a sensor connection cable path(7), a connective pipe(8), a middle part support portion(9), an end part support portion(10), a handle(11), a cable connector(12). The plate spring(1) is compressed when a sensor is inserted into a case. The coil spring(2) is inserted into the support plate(5) connected to the sensor(3). The sensor(3) is used for sensing an elastic wave. The coil spring guide(4) is used for guiding a coil. The support plate(5) is connected by the sensor(3) and the fixing bolt(6). The sensor connection cable path(7) has a cylindrical shape. A sensor cable is installed in the connective pipe(8). The middle part support portion(9) supports the connective pipe(8). The end part support portion(10) fixes the handle(11) and the cable connector(12).

Description

A pressing and fitting device for the precise aquisition of seismic reflection signals in tunnel}

In the seismic reflection survey in tunnels, all equipment is imported and used in Korea. Therefore, the equipment itself is quite expensive, but even the case, which is a consumable for installing the sensor on the tunnel wall, is imported and used because there is no standard product in Korea, resulting in waste of foreign currency. Therefore, in order to use a commercially available prototype as a case, the sensor and the case need to be in close contact with each other.

In order for the sensor to detect the reflected wave reflected from the ground, it is essential to minimize the effect of energy reduction caused by the case and the sensor spaced apart. Therefore, in order to solve this problem, the plate spring helps to maintain the original elastic force by the coil spring installed on the sensor support before inserting the sensor into the case by using the plate spring with excellent elasticity. As the spring receives the compressive force, a tension is generated in which the sensor is in close contact with the top of the case, and at the same time, the coil spring installed on the sensor support is also compressed by the tension of the leaf spring.

Hereinafter, the configuration and operation of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded view of a sensor and a sensor part of the present invention.

Figure 2 is a schematic diagram of the principle before and after inserting the sensor into the case

<Explanation of symbols for the main parts of the drawings>

1. Leaf spring

2. Coil Spring

3. Sensor

4. Coil Spring Guide

5. Sensor connection support

6. Fixing bolt

7. Sensor connection cable path

8. Support connecting pipe

9. Intermediate deflection prevention support

10. Tip Preventive Support

11. Handle

12. Cable connection connector

FIG. 1 is a schematic exploded view of the present invention and an enlarged exploded view of a sensor unit, and FIG. 2 shows a changed state of a leaf spring and a coil spring before and after insertion of a sensor into a case.

In FIG. 1, the leaf spring 1 compresses the sensor when the sensor is inserted into the case, thereby closely contacting the sensor with the case. The coil spring (2) is embedded in the support (5) connected to the sensor, so that the tension is normally transmitted to the leaf spring to help the leaf spring to maintain the elastic force, when inserted into the case is compressed by the tension of the leaf spring and then again When the sensor was removed from the case, the original elastic force was maintained. The sensor 3, also called an accelerometer, serves to sense the acoustic wave generated in the transmitter. The coil spring guide 4 is made to install the coil spring in the sensor connection support 5 and serves as a guide of the coil. The sensor connection support 5 is connected to the sensor 3 and the fixing bolt 6 and provides a passage through which the leaf spring can move freely by tension.

The sensor connection cable passage 7 is provided with a cylindrical passage for the cable to be connected to the sensor. The support connecting pipe 8 connects between the supports and at the same time, it is also a passage where the sensor cable is to be installed. The intermediate deflection prevention support 9 prevents deflection by self-weight of the connection pipe itself and at the same time helps the sensor to be smoothly inserted into the case.

End deflection prevention support 10 receives the weight of the connection pipe 8 and serves as a holder of the handle 11 and the cable connection connector 12 used when inserting and withdrawing the sensor.

According to the present invention as described above can be used to adjust the tension of the leaf spring and coil spring by selecting a suitable one from the prototype without the need to purchase a case that exactly fits the sensor, and helps in the effect of import countermeasures and the development of the equipment.

Claims (1)

When the sensor is inserted into the case, the coil spring 2 is retracted by the tension of the leaf spring 1, and at the same time, the upper end of the sensor and the case are in close contact with each other to prevent attenuation of energy due to the separation between the sensor and the case. .