JPS5924366B2 - Vibration detection measurement device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for reliably detecting and measuring earthquakes, other vibrations such as those caused by construction work, the passage of heavy vehicles, or abnormal vibrations of rotating machinery.

In order to detect earthquakes, the idea of suspending a spherical body from a permanent magnet and detecting and measuring the spherical body as it falls due to vibrations has already been proposed by the present applicant. , Japanese Patent Application Publication No. 47-41684, Japanese Patent Application No. 46-48036, Japanese Patent Publication No. 13670-1987
(No. Publication) This invention employs a cylindrical body as the sensing body, so that the sensing body itself can be magnetized in addition to the supporting member, and the weight and center of gravity of the sensing body can be freely adjusted. This invention makes it possible to more reliably capture complex vibration phenomena by accurately distinguishing and detecting horizontal vibrations that are noticeable in earthquakes and vertical vibrations caused by disturbance vibrations. The purpose is to measure.

To explain this device with reference to drawings, Fig. 1 shows the basics of the present invention, in which a detection box 1 is provided with a vertically elongated detection body 2 having a cylindrical shape a, and a support member 3 that supports the detection body on a lid body A at the top. These are made of magnetic material, and by attaching a permanent magnet M to one or both of them or by magnetizing them themselves, the sensing body 2 is suspended from a support member 3 provided above as shown.

In this case, C is an adjustment plate made of a non-magnetic material.

By installing this device in a certain place such as a building or machine, when vertical or horizontal vibrations are applied, the detection body 2 will swing according to the direction of vibration, and the vibration will become stronger. Eventually it leaves the support member and falls.

In this way, this device can reliably detect vibrations exceeding a certain level.

Then, as shown in FIG. 2, a heavy object 4,
For example, by mounting a heavy metal such as lead, the center of gravity can be lowered and the object can be made more sensitive to vibrations.

In addition, by placing this heavy object at an appropriate position as shown in FIG. 3, the weight and center of gravity can be adjusted, and as shown in FIG. 4, the adjusting member 5 can be removed with a screw 6. You can increase or decrease it as appropriate to adjust the overall weight and center of gravity.

In addition, by changing the diameter, length, and width of the tube, the strength of the magnet, and the adjustment plate a, it is possible to adjust the degree to which this device detects vibration in various ways. .

By preparing several types of devices with different conditions in advance, it is possible to measure the strength of the vibration depending on which device's sensing object falls during vibration.

Therefore, in this invention, the above-mentioned sphere is used as the detection object,
Because the supporting member and the sensing sphere hang down at a single point of contact, the sensing object reacts sensitively to even relatively slight vibrations and is prone to falling, but in this device, the sensing object is cylindrical. There are many surfaces in contact with supporting members, and when used as an earthquake detector, it will not fall until the vibration reaches a certain level, and the planned horizontal motion will not be applied. This will ensure that you fall.

This makes it possible to provide an earthquake detection and measurement device with even higher performance and reliability, and by allowing the support member and detector to be freely adjusted through the many factors mentioned above, vibrations in the horizontal and vertical directions can be reduced. Since it is possible to design a detection device that is suitable for mixed and complex vibration phenomena, it can be widely applied not only to earthquakes but also as a general vibration detection and measurement device.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view of the main part of the vibration detection and measurement device of the present invention, and FIGS. 2, 3, and 4 are cross-sectional views of the main parts of each detection body. 1...Detector, 2...Detecting object, 3...
...Supporting member, 4...Heavy object, 5...
...Adjustment material, A...Lid body.

Claims (1)

[Claims] 1. A detection box is provided with a cylindrical detection body, a lid is provided with a member that supports the detection body, one or both of which are magnetized, and the detection body is suspended in a plane, so that the detection body is suspended from the outside. A vibration detection and measurement device characterized by sensing vibration and causing a detection object to fall. 2 The detection box is equipped with a cylindrical detection body, the lid is equipped with a member to support it, one or both of them are magnetized to hang the detection body in the plane, and the weight and center of gravity of the detection body are adjusted. A vibration detection and measurement device characterized in that it is provided with an adjustment means for adjusting the vibration.