SU277333A1 - PRESSURE SENSOR WITH FREQUENCY OUTPUT SIGNAL - Google Patents

Description

This invention relates to the field of control and measurement technology. Known pressure sensors with a frequency-M output signal containing a vibration-frequency jumper, made in one piece with the frame, the membrane and the "ronshteyn": and, 1 do not provide the possibility of pressure and pressure in the range of O-5 kGs / cm . In the proposed sensor, for increasing sensitivity, the guide plates defining the movement of the rod are arranged parallel to the membrane, and the vibrational frequency jumper fixed at one end to the stem and to the other body is inclined to the plane of the membrane. The drawing shows a schematic diagram of the proposed sensor. The sensor consists of a housing 1, a membrane 2, a sensitive vpratsio-frequency jumper 3, a rod 4, guide plates 5, and pillars 6 that form the frame 7. All these elements are made in one piece. The working cavity of the sensor closes the flange 8 welded to the housing, equipped with a connecting XBocTOBHiKOM 9. A drainage hole is used to fill and flush the working cavity, closed by screw 10 with an oscillation pathogen, and the other with an adapter. Both converters are fixed} ia to the bracket J2 mounted on frame 7, on the other side of which an electron is fixed} 1st amplifier 13. Vibrating frequency jumper 3, electromagnetic converters 11 and electronic amplifier 13 form a circuit operating in self-oscillating mode. The frequency signal from the amplifier 13 is fed to the secondary device, fixing this frequency. When the bridge 3 is tensioned, its frequency is increased and the force applied to it is judged by the modified frequency of the self-oscillating circuit. The sensor works as follows. The membrane 2, the stem 4 and the guide plates 5 form a moving system with one degree of freedom along the sensor axis. A sensitive frequency-frequency jumper 3 connects the moving system with the housing / and forms an angle a with the plane of the membrane 2. The force P, arising under the action of the measured pressure and directed along the sensor axis, decomposes into a force PI, directed along the sensitive element, and, force PZ, directed across the movement of the moving system and perceived by the membrane 2 and guide plates 5.

Similarly, at values of the angle a, other than He, 90 °, force R, acting тв-а 1.a on the sensitivity Vd1; brac- tion-frequency jumper: q .9, will always be less than or equal to the load P .

In order to obtain the necessary frequency deviation, a tensile force of 8–10 kg / s is required. The minimum dimensions of the vibration frequency-frequency channel 3, but by decreasing the angle a, can be suitably reduced the diagonal of the measured pressure. Subject invention

Pressure sensor with frequency output

A signal containing a sensitive vibration frequency 1 strap, one single whole with the housing, a stem, a membrane and a guarantor lastia, and included in a self-oscillating circuit, characterized in that, in order to increase sensitivity, it has The current displacement is located parallel to the membrane, not B1I b | ratsIonno-cha; Stotna jumper, fixed one end of the rod, and the other on the corius, is inclined to the plane of the membrane.