SU662823A1 - Temperature measuring device - Google Patents

Description

(54) DEVICE FOR TEMPERATURE MEASUREMENT

 . . one

The invention relates to the field of thermometry.

A device for temperature measurement is known, which contains a string fastened to the posts and interacts with a vibration exciter .v "v. However, the known device does not have the required measurement accuracy, since the string oscillates at a low frequency.

The closest in technical terms to the invention is a device for measuring temperature, containing a string mounted on racks, interoperable with an electromagnetic vibration exciter, and vibration amplifiers 2.

However, the known device has a low measurement accuracy due to the weak dependence of the frequency of oscillation of the string on temperature and high inertia;

The aim of the invention is to improve the measurement accuracy.

For this purpose, a reference generator, a de- frequency generator, a frequency multiplier, a phase comparison unit / piezoelectric transducer for string oscillations, connected to the input of the second

an oscillation amplifier connected in series with a frequency multiplier and a phase comparison unit, to the second input of which is connected one of the outputs of a reference oscillator connected by a second output to a frequency divider connected in series with the first amplifier and an electromagnetic vibration exciter

0 strings ..

The proposed device is illustrated in the drawing, where 1 is a reference oscillator, 2 is a frequency divider, 3 is the first amplifier of oscillations, 4 are current conductors,

5 5 is a string, 6 is an electromagnetic exciter of vibrations, 7 is a piezoelectric transducer of string vibrations, 8 is a stand, 9 is a base, Yu is a second amplifier of vibrations, 11 0 is a frequency multiplier, 12 is a phase comparison unit.

. The device works as follows. From the reference generator 1, the signal goes to the phase comparison unit.

5 12 and frequency divider 2. The signal frequency of generator 1 is, for example, 1 MHz. Divider 2 lowers the oscillation frequency, for example, 512 times to a frequency of 1,; 953 kHz. After strengthening in

Claims (2)

0 the amplifier 3 oscillates to the electromagnetic exciter 6, which creates an alternating magnetic pole that oscillates the string 5, which is sensed by the piezoelectric transducer 7 and, after being converted by the current leads 4, goes to the second amplifier 10. From the output of the multiplier 11, having a multiplication factor 12, a signal at a frequency of 1 MHz is fed to one of the inputs of the phase comparison unit. Improving the accuracy of measurement will improve the control of a number of technological processes. The invention includes a device for measuring temperature, comprising a string that is reinforced by a string, interacting with .... an electromagnetic excitatory oscillator of a scientific research institute, and amplifiers of oscillation. In order to improve measurement accuracy, a reference oscillator, a frequency divider, a frequency multiplier, a phase comparison unit, a piezoelectric string oscillation transducer connected to the input of a second vibration amplifier connected in series with a frequency multiplier and a phase comparison unit, the second input of which is connected to one of the outputs of the reference oscillator connected by a second output to a frequency divider connected in series with the first amplifier and the electromagnetic exciter) oscillation string. Sources of information taken into account in the examination of 1, Maklakov DF Modern technique of atmospheric research. Hydrometeoizdat, L., 1964, p.22. 2. USSR author's certificate number 445856, cl. G 01. K 5/56, 1972.