SU1617097A1 - Inertial...failure meter - Google Patents

Abstract

The invention relates to construction, in particular, to devices for determining failure of piles and counting the depth of their piles. The aim of the invention is to simplify the design and expand the technological capabilities of the device. Inertial failure meter includes sensor 1, recording and recording equipment. The sensor is made in the form of a housing 4, in which between the upper 5 and lower 6 electrodes a movable electrode is placed, made in the form of an inertial mass 7. The sensor is rigidly mounted on the diesel hammer workpipe. The sensor makes it possible to record very small pile movements, as well as to determine the magnitude of the elastic failure. 2 Il.

Description

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i The invention relates to construction, 4 (devices for determining failure of piles and counting the depth of their piles.

The purpose of the invention is to simplify the design and expand the technological possibilities.

FIG. 1 shows the installation diagram of the failure gauge on the pile; in fig. 2 - inertial sensor, cut.

Inertial refusal device contains inertial sensor 1, recording 2 and recording 3 equipment. Sensor 1 is made in the form of a hermetic case 4, in which between the top 5 and bottom 6 electrodes an inertial mass 7 is placed, made in the form of an electrode springed by means of a membrane 8. The tension of the flat membrane 8 is controlled by a screw 9. Sensor 1 is rigidly mounted with Kronschteyna 10 on diesel engine hammer 11.

Failure meter works as follows. When the hammer 11 hits the pile 12, the sensor 1 reports an acceleration proportional to the depth of the pile 12, while the case 4 of the sensor 1, rigidly connected with the pile bracket 10, is lowered together with the top 5 and bottom 6 electrodes. The inertia mass 7 remains near its former position, pressing against the electrode 5 and forming with it the capacitance. The inertia mass 7 will be held against the electrode 5 until the pile 12 moves with positive acceleration. As you progress

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the pile 12 starts its braking; the inertial mass 7 begins to act negative force of acceleration and it is pressed against the electrode 6. In this position, it is held until the pile is completely stopped 12. In the pressed state, the inertial mass 8 with electrodes 5 and 6 alternately forms electrical capacitances that lower the electric signal which is perceived by the recording 2 and recording 3 equipment. In the normal progress of the pile, a pair of electrodes 5-7 first work, and then 6-7. In the case of elastic failure, a pair of electrodes 6-7 first work, and then a pair 5-7.

The design of the failure gauge expands the technological capabilities of the device, making it possible to determine whether the pile is clogged normally or an elastic failure occurs. The device has a high sensitivity, since the use of inertial mass makes it possible to record very small movements of piles.

Claims (1)

Invention Formula An inertial refractor, including a sensor with a capacitor of varying capacitance, registers and records equipment characterized in that, in order to simplify the design and expand the technological capabilities, the capacitor can be made as 3 upper and lower electrodes, between which the inertial mass is located electrode movably fixed in the housing. 0 25