SU1619069A1 - Digital thermometer - Google Patents

Abstract

The invention relates to temperature measurements and allows for improved measurement accuracy. The signal from the thermal converter 1 of the resistance connected to the current regulator 12 is fed through an analog switch 14, a voltage follower 15 to the input of the integrating voltage converter 16 in a time interval. From the output of the converter 16, the signal through the block 6 forming the weight function enters the block 7 reversible counters. Calculation unit 8 calculates the value of the measured temperature, which is displayed by display unit 9. The operation of all elements is controlled by a control block 11 / to which the generator 10 signal is applied to the input. 5 Il. and

Description

Block B sormormio & Ani Weight function

taanomafjvm.

P

from the output of the generator

Teat

Ljttl

WITH ANOTHER OUTPUT OF THE CONTROL UNIT

B

From the fourth time / Spock's control stroke 11

7V

  T

eleven

From the output of the integrative transverse voltage, I sang 5 voltages during the time interval

/

eleven

Fm, 3

On the counting input of block 7

W

reversible invoices

f generator frequency

MS

ngn

g j

Tc-jtiepSw weight function level

fit

f / 2

ill

P

PUIG

P.

B

TCTI Second stage of demon functions

f

f

Claims (1)

Claim A digital thermometer containing a resistance thermoconverter, the first current output of which is connected through a first communication line to a common bus of a digital thermometer and connected to the first terminal of the first current stabilizer, and the potential terminals of a resistance thermoconverter are connected through a second and third communication line to the inputs of an analog switch, display unit, block of calculations, block of reverse counters and control block, the outputs of which are connected to the control inputs of an analog switch, block of reverse sensors and calculation unit, characterized in that, in order to improve the measurement accuracy, a second current stabilizer is introduced into it, integrating a voltage converter in a time interval, a pulse generator, a weight function generating unit and a voltage follower, the input of which is connected to the output of the analog switch, and output - with the first input of the integrating voltage converter in the time interval, the second input of which is connected to the output of the second current stabilizer, the control input is connected to the control unit, and you the stroke is connected to the first input of the weight function forming unit, the second input of which is connected to the output of the pulse generator connected to the first input of the control unit, the second input of which is connected to the second output of the calculation unit, the first output of which is connected to the input of the display unit, and the input is connected to the output block of reversible counters, the input of which is connected to the output of the block forming the weight function, I control eleven 1619069 ’· the inputs of which are connected to the outputs of the control unit, while the second terminal of the first current stabilizer is connected through the fourth communication line to the second current terminal of the resistance thermoconverter. block B formation of the Weight function " I I I, 4 " I I voltage 6o Time interval (Riga 2 physical. 3 phage 5.