SU171651A1 - - Google Patents

Description

The main author. St. No. 159678 issued to a densitometer containing a vibrator, a power supply unit for an electromagnetic exciter of mechanical vibrations of a vibrator, a recording device, and an amplifier with a secondary device. The vibrator is made in the form of two U-shaped tuning-fork tubes installed on a common plate and having a common supply of the investigated suspension. To adjust the driver for a given frequency, the tubes in the upper part are equipped with interchangeable moving weights and are interconnected by a spring.

The proposed densitometer is made with two vibrators that do not have a mechanical connection. Each of the vibrators consists of three U-shaped tuning-fork tubes tuned to the same frequency and mounted on a common base. The electromagnet, the exciting vibrator, is attached to the middle tube. Such an implementation of a tight gauge allows a high sensitivity to changes in density.

The drawing shows the described densitometer in two projections.

On a common basis 1 with the aid of racks 2 two vibrators are installed. Each vibrator consists of three U-shaped pipes of 3 tuning-fork type, tuned to the same frequency and installed on the bases.

The vibrators are driven by the corresponding electromagnets 5 and 6 connected to the middle tubes. There are 7 to 8 displacement sensors on the vibrators. The first vibrator with electromagnet 5 and sensor 7 is the source of a stable signal in frequency and amplitude for the second vibrator. The signal from the second vibrator is taken off by the sensor 8 and fed to a measuring device (not shown in the drawing), graduated in appropriate units.

As you know, tuning forks have a high frequency stability. Basically, the frequency of the tuning fork depends on the temperature. In this

an acoustic system consisting of several tuning forks, the effect of temperature is taken into account by two vibrators.

Both vibrators tune to the same frequency when filled with water. The choice of frequency has a significant effect on the stability and noise immunity of the density meter, and, as experiments have shown, the use of frequencies of 350-400 hch gives the best results.

there the oscillations decrease dramatically and decrease in the magnitude of the meter.

In order to prevent subsidence (the components do not affect the instrument's readings, the suspension is alternately passed through one vibrator, then through another, alternating with water.

Subject invention

Densimeter according to ed. St. No. 159678, characterized in that, in order to increase the sensitivity to a change in density, it is made with two mechanically coupled vibrators, each of which consists of three U-shaped tuning-fork tubes, tuned to the same frequency installed on the base; it is a base, and an electromagnet,: exclamation: dyush; iy vibrator, is connected to the middle (U-shaped) tube.

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