SU1161828A1 - Device for determining unbalance of branches of quartz crystal vibrator tuning fork - Google Patents

Abstract

A DEVICE FOR DETERMINING UNBALANCE OF BRANCHES OF CAMERTON OF THE QUARTZ RESONATOR, containing a generator. ALL € ЛШЗ 1 1 Т; -: --.- -1 13 ;:, -, V. i & s ..: a transmitter and an instrumentation system with an Indicator, characterized in that, in order to increase sensitivity and accuracy, the transmitter is made up of at least two semi-jigs on an elastic base, which are in contact with the resonator during the measurement, and two piezoelectric transducers, each of which is mounted on a corresponding semi-clamp, the measuring system is complete. in the form of two circuits, each of which consists of a series-connected amplifier , Capacitor and vtr DC converter, circuit inputs (L are connected to respective outputs of the transducers, and the outputs - to the indicator.

Description

The invention relates to a measurement technique and can be used to control the quality of quartz tuning-fork resonators.

The closest in technical essence to the invention is a device for determining the imbalance of the tuning fork branches of a quartz resonator, comprising a generator, a measuring transducer and a control, but a measuring system with an RH indicator

The disadvantages of this technical solution are low sensitivity and accuracy due to the loss of oscillation energy and low activity of the resonator.

The purpose of the invention is to increase the sensitivity and accuracy due to the quality factor or dynamic resistance when balancing.

The goal is achieved by the fact that the device for determining the imbalance of the branches of the tuning fork of the quartz resonator, which contains a generator, a measuring transducer and an instrumentation system with an indicator, is measured by a measuring transducer in the form of at least two semi-jigs on an elastic base, which are in contact with the measuring process resonator, and two piezoelectric transducers, each of which is fixed on the corresponding semi-clamp, the measuring system is made in the form of two circuits, each Yes, of which it connects from a series-connected amplifier, a decoupling capacitor and the top of the receiver, the inputs of the circuits are connected to the outputs of the corresponding piezoelectric transducers, and the outputs to the indicator.

EA drawing shows a block diagram of the device.

The device for determining the imbalance of the branches of the tuning fork of the quartz resonator contains a generator 1, a measuring transducer and a measuring and measuring system with indicator 2, the measuring transducer is made in the form of at least two semi-clamps 3 and 4 on the elastic base 5, which is in contact with the resonator 6, and two piezoelectric transducers 7 and 8, each of which is fixed on the corresponding half-clamp 3 and

4. The test-measuring system fa is made in the form of two circuits, each of which consists of series-connected amplifier 9 and 10,

separation capacitor 11 and 12, rectifier 13 and 14, the inputs of the circuits are connected to the outputs of the corresponding piezo-transducers 7 and 8, and the outputs to the indicator 2.

The device works as follows.

When the device is turned on in a tuning fork quartz resonator 6, mechanical oscillations are excited from generator 1. If the tuning fork is not balanced, i.e. its branches have different moments of inertia and resonant frequencies, some of the energy of mechanical oscillations will be transmitted to the housing and the outputs of the resonator 6, which are in contact with Q semi-clamps 3 and 4. Mechanical vibrations, propagating in the material of semi-clamps 3 and 4, form

On the plates of piezoelectric transducers 7 and 8, an alternating voltage of the same frequency. These voltages, being amplified and at the same time filtered from interference by measuring narrow-band amplifiers 9 and 10 through separation capacitors 11 and 12, are fed to the input of opposite-polarity rectifiers 13 and 14 so that the output voltage of the first polarity is positive. relative to the body, the entrance of the second - negative polarity.

Thus, indicator 2 connected to the outputs of the outputs

13 and 14, measures the sum of these stresses. The use of two channels of reinforcement and fastening of the semi-clamps 3 and 4 through the elastic base 5 is. Switches the phase distortion correction circuit from the device. The indicator reading 2 is directly proportional to the amplitude of the mechanical oscillations formed in the cavity case-6 due to the imbalance of the branches. In the process

balancing by changing the moment of inertia of the legs of the indicator indicator 2 will change. With a proper balancing process, the voltage should decrease.

As experience shows, when using the specified device, the output voltage of the outputs 13 and 14 in the process of balancing the resonator

311618284

6 may be reduced from 2000 mV to 20 mV. TI, which allows for more than the proposed device, provides high-quality control of the resonating sensitivity and accuracy 6.

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Claims (1)

DEVICE FOR DETERMINING THE IMBALANCE OF THE BRANCHES OF A QUARTERZ QUARTZ RESONATOR, comprising a generator, a measuring transducer and a control and measuring system with an indicator, characterized in that, in order to increase sensitivity and accuracy, the measuring transducer is made in the form of at least two half-clamps on an elastic base in contact with the measurement process with a resonator, and two piezo transducers, each of which is fixed to the corresponding half-clamp, the control and measurement system ena.v as two chains, each of which consists of successively soedinen- ~ GOVERNMENTAL amplifier separating concentrations - condenser and rectifier circuits inputs connected to the outputs of the respective piezoelectric transducers, and the outputs - to the indicator. 828191ITfS> 1 - 1161828 2