SU131103A1 - Seismic vibration sensor - Google Patents

Description

Seismic type vibration sensors are known with sensitive elements made in the form of capacitor plates or inductors, the basement of which is rigidly connected to a seismic mass.

However, vibration sensors of this kind usually do not provide a quick changeover from one measurement range of vibration amplitudes to another.

The described vibration sensor is free from this disadvantage. A distinctive feature of it is. that the fixed part of the sensing element is provided with a rod screwed into a gear, limited by axial mixing. At the same time, the gear is engaged with another gear, the rotation of which restores the necessary gap between the moving and fixed parts of the sensing element, thereby tuning the vibration sensor according to its sensitivity.

The drawing shows a schematic diagram of the vibration sensor.

Arranged vibration sensor as follows.

In the housing / suspended load 2, immersed in a damping fluid 3. Load 2 is suspended cantilever on two plate springs.to 4. The cavity with the load and fluid is separated from the cavity in which the capacitive plates are located, elastic diaphragm 5. The movable layer 6 is rigidly connected It is loaded with a load 2. The fixed plate 7 on its rod 8 has a thread on which a gear wheel 5 is screwed and meshes with the wheel 10. The latter is fixed on a roller, i have: I eat the tail end 11 at the output end and rotates during adjustment this or the other side is screwy or screwing the wheel 9 on the thread of the rod 8. Since the gear wheel 9 is limited from the ends and cannot move in the axial direction, the plate 7 moves when screwing or unscrewing, and therefore the gap between the plates changes. In this way, the converter is tuned.

The stem of the indicator head / 2 rests against the end of the rod, along which a gap D is drawn between the plates. Indicator head Kpi pits in the case sleeve before adjusting the device with some tension of the measuring foot. After the required clearance is established between the plates 6 and 7, the rod of the plate 7 is locked with a screw / 5, its end in the keyway 14 of the rod. Plates are electrically isolated from the case and have a terminal. In the case of an iductive sensor, instead of the gap between the plates, a gap is established between the poles of the coils.

Subject invention

Seismic type vibration sensor with sensitive elements 11m made in the form of capacitor plates or inductors, the movable part of which is rigidly connected with the seismic mass, which is characterized by the fact that, in order to adjust it in sensitivity, by changing the size of the gap between the movable and stationary parts of the sensing element , the fixed part of the sensing element is provided with a rod screwed into a gear wheel, limited from axial mixing, and which is engaged with the gear wheel, turning which establish the necessary size of a gap.

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