SU114080A1 - Device for measuring speeds and movements - Google Patents

Description

Devices are known for measuring speeds and displacements based on a one-time or double integration of measured accelerations. Known device-like devices contain capacitive or other differential sensors and self-balancing measuring circuitry with amplifying, integrating and differentiating units. The moving element of the sensor is an inert mass, it is secured on an elastic metal thread and is equipped with a magnetic demuffer.

The proposed device is more perfect, but compared with the known devices, since it provides an increase in the accuracy and expansion of the measurement range and allows recording their results.

FIG. 1 shows a structural diagram of the acceleration sensor; in fig. 2-electric scheme of the proposed device.

The movable element of the sensor is an inert mass /, fastened on an elastic metal thread 2 and provided with a magnetic demnfer 3. The inertial mass / simultaneously serves as a rotor of a capacitive sensor. When acceleration occurs, mass 1 is deflected at an angle. At the same time, a signal is received from the capacitive sensor, which enters the amplifier 4, and then to the working engine 5. The engine rotates the system of permanent magnets 6, the magnetic flux of which intersects the metal nonmagnetic disk 7, which is rigidly connected to the mass. During the rotation of the magnets 6 in the disk 7 eddy currents arise, which, interacting with the magnetic flux, create a moment proportional to the speed of rotation of the magnets.

In order to improve the measurement accuracy in the proposed: 1 device used two stages of amplification and five measuring channels with different ranges of measurements. For this, the movable element of the sensor is rigidly connected with two metal disks 7 and 8. The disk 7 interacts with the magnetic system 6, which is driven into rotation through the reducer by a first-range electric motor 5 connected at the output of the second stage of the amplifier 4. The disk 5 is bangled with the magnetic system 9 driven in rotation through a reducer by a second range electric motor 10. This motor is controlled via inductive potentiometer Jj, the driving motor J2 of which is connected to the output of the first stage amplifier 4.

To record the measurement results, a photoelectric impulse system containing two bottoms 13 and 14 with openings was used, mounted on intermediate axes 15 and 16 of the gearboxes of the first and second ranges. These disks are located between 17 t illuminators by photodiodes 18 connected to photosensitive amplifiers and a pulse shaper, the output of which includes counting systems.

Subject invention

1. Device for measuring speeds and displacements by integrating accelerations, measured with a capacitive or other differential acceleration sensor with a moving element, which is an inertial mass, mounted on an elastic metal nanthi equipped with a magical damper, containing a self-balancing measurement pattern

with amplifying, integrating and recording units, characterized in that, in order to improve accuracy and extend the measurement range, it has two amplification stages and two measuring channels with different measurement ranges.

2. A device of claim 1, characterized in that the sensor element is rigidly connected to two conductive disks, one of which interacts with a magnetic system driven through a gearbox by a first-stage powering motor turned on at the output of the second stage of amplification, and the other - With a magnetic system driven in rotation through a gearbox, working on a second-range electric motor, controlled via an inductive potentiometer, the electric motor of which is switched on at the output of the first stage gain

3. The device according to paragraphs. 1. And 2, characterized in that, in order to record the measurement results, on intermediate axes of the gearboxes of the first and second ranges, dns with holes are fixed, located between the cameras and photodiodes connected to the corresponding phase-sensitive amplifiers and pulse shapers, at the output of which counting systems included.

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