SU1571420A1 - Device for measuring temperature and difference of temperatures - Google Patents

Abstract

The invention relates to thermometry and allows the functionality of the device to be expanded by measuring the temperature and the temperature difference, as well as the amount of heat given by the object to the environment or derived from it. The output signals of the thermocouples 1 and 2 of the resistance are converted into digital form using ADC 4 and 5. Depending on the operating mode, the output signal of one of the thermocouples is fed either to the display unit 14 or to the input of the subtraction unit 10, or to the input of the calculating unit 11. The calculating unit 11, based on the obtained value of the temperature difference, the sign of this difference and the stored constants, calculates the value of the amount of heat. The result of the calculation is displayed on the display unit 14. 1 il.

Description

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The invention relates to thermometry and can be used to measure temperature, temperature difference and heat flux, with

The purpose of the invention is to expand the functionality of the device. The drawing shows a block diagram of the device.

A device for measuring temperature and temperature differences containing thermocouples 1 and 2 resistance, voltage divider 3, voltage p and second and analog-digital converters 4 and 5, decoder 6 characters, 15

memory register 7 and 8, control unit 9, subtraction unit 10, calculation unit 11, current source 12, shaping unit 13 time slots, block 14 indication.20

The device allows, along with the measurement of temperature and the difference of the TGM-heratures, to measure the heat flux, which the subject gives to the environment or receives 25 of it during the control time, which allows the device to be used as a thermal meter. - impact on the object, in particular on the human body, 30

The device works as follows.

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In the mode of measuring the ambient temperature, a signal proportional to the ambient temperature, from the output of the thermal converter 1 of the resistance, to the second input of the decoder 6 characters after the signal, Q tynaeT the output voltage divider 3, the value of which corresponds to 0 ° C. In the 6-digit decoder, these signals are compared and, depending on the result, a signal is output to the display unit 14, which highlights the temperature sign (+ or -), the output of the thermal converter 1 of the event is digitized using the A / D converter 4 from the output of the CQ 7 register, digital information on the ambient temperature is fed to the display unit 14,

In the mode of measuring the temperature difference, the output signals of thermal converters 1 and 2 of the resistance are converted into digital form ATSD 4 and 5 and are fed to the inputs of the subtraction unit 10, the resulting value

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with

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the temperature differences are fed to the input of the calculating unit 11, and from the second output the information about the temperature differences through the control unit 9 is fed to the indicadia block 14,

In the heat flow measurement mode, the calculating unit 11, to the input of which information about the temperature difference arrives, calculates the amount of heat using the formula

 here

where H is the amount of heat, kcal; K - coefficient of heat insulation

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С - body shape factor; S is the surface area of the body, ma; & T is the temperature difference. The expressed value of the amount of heat through the control unit 9 is supplied to the display unit 14,

The device has a small size and can be placed, for example, in the case of electronic wristwatches, using their separate units for their work.

Claims (1)

Invention Formula A device for measuring temperature and temperature difference, containing the first and second resistance thermocouples, the first analog-digital converter, the control unit, the calculator, the display unit, the power source connected to the first terminals of the resistance thermocouples, in order to functionality by measuring the amount of heat, a voltage divider is introduced into it, the second analog | a digital converter connected to the second output of the second resistance thermocouple, a character decoder, first and second memory registers, a subtractor and a time interval generator connected by an input to a power source, the first output to the first input of the control unit, the second output through the second register memory - to the second input of the control unit, the third input of which is connected to the second output of the second thermal converter of the resistance and the input of the second analog-digital converter, the output of ennogo to the inverting input of the subtraction unit and the fourth input a control unit, the fifth input of which is connected to the output of the computing unit, the input connected to the output of the subtraction unit, the input of which is connected to the output of the first analog-digital converter and the sixth input of the control unit, the seventh input of which is connected to the second output of the first thermal resistance converter and the input of the first analog - a digital converter, the second output of the subtraction unit is connected to the eighth input of the control unit, the ninth input of which is connected to the output of the first five memory register, the first and second inputs of which are connected respectively to the first and second outputs of the control unit, the third output of which is connected to the input of the decoder, the second input connected to the output of the voltage divider, and the output. - to the sign input of the display unit, the bit input of which is connected to the fourth output of the control unit, the input of the voltage divider is connected to the connection point of the first terminals of the first and second resistance thermal converters.