SU1057832A1 - Device for measuring material specific heat - Google Patents

Abstract

MEASUREMENT DEVICE: COMPETENT HEAT CAPACITY OF MATERIALS, containing an add-on-screen cal calimeter, an adiabatic casing, an enclosure, a heat meter, a temperature transducer of the sample's temperature, and an adiabatic thermal transducer of the temperature regulator, and a thermal transducer. a central processing unit, a memory unit, an interface control panel, an analog-to-digital converter, connected by an input to a sample temperature transducer, and an output to an interface, characterized in that in order to increase accuracy while simultaneously expanding the functionality, a differential temperature transducer is additionally introduced into it. temperature on the sample, a digital-to-analog converter, a program heating controller, an analog digital converter are multichannel and inputs are connected (L to the adiabatic regulation error thermal converter and a temperature differential converter on the sample and a heat meter, the power supply unit of the sample heater is connected to the interface via serially connected digital-analog converter software warming up regulator. SP 00 05 th

Description

The invention relates to devices for determining the specific heat capacity of materials and can be used in instrument engineering, mechanical engineering and experimental technology.

A device for determining the specific heat capacity is known, comprising a calorimeter with two adiabatic shells, heaters of the first and second adiabatic shells, a sample heater, a sample temperature converter, a temperature difference sample converter and a first adiabatic shell, a temperature sensor of the temperature difference of the sample and the second shell, a case, a temperature sensor, and a second shell, the temperature sensor of the temperature difference of the sample and the second adiabatic shell, and the first shell adiabatic shell, the temperature sensor of the sample temperature difference and the second adiabatic shell, and the first shell adiabatic shell, the temperature sensor of the sample temperature difference and the second adiabatic shell. first adi batic shell, power supply unit heater of the second adiabatic shell, block n Tani heater sample block and sample heating software controller software Cl heating of the sample,

A disadvantage of the known device is the lack of control of maintaining adiabatic conditions and the resulting error in determining the specific heat capacity.

The closest technical solution to the present invention is a device for measuring specific heat capacity, containing an adiabatic casing calorimeter, an adiabatic casing heater, a sample heater, an adiabatic control error thermal converter, a sample temperature thermal converter, and a thermal converter of the adiabatic regulation error cell, a heating template and a sample of the sample heating template. comic control interface. Timer., Central processing unit, signal control circuit. interface and analog-to-digital converter connected by the input to the thermal converter of the sample temperature, and output to the interface 2,

The disadvantage of such a device is a decrease in the accuracy of determining the specific heat capacity due to the lack of control over the ACCURACY of maintaining adiabatic conditions and taking into account the resulting error.

The purpose of the invention is to improve the accuracy of measurements while expanding functionality.

This goal is achieved by the fact that in a device for measuring the specific heat capacity of materials, containing a calorimeter with an adiabatic shell, an adiabatic shell heater, a heater

sample, calorimeter, sample temperature thermocouple, and adiabatic regulation error thermocouple, sample heater power supply unit, adiabatic control unit, interface,

a timer, a central processing unit, a memory device, an interface control panel and an analog-digital converter connected by an input to a sample temperature transducer and an output to an interface; a temperature differential transducer on the sample was additionally introduced,

5 digital-to-analog converter, software warm-up controller, and analog-to-digital converter made of multichannel and inputs connected to differential thermal converter .- temperatures on the sample and heat meter,

the power supply unit of the sample heater is connected to the interface through a serially connected digital-to-analogue converter and an nporpawiMHoro heat-up controller.

 Such an embodiment of the device makes it possible to take into account the error in maintaining adiabatic conditions when determining the specific heat capacity, and thereby increasing the accuracy of measuring the specific heat

0 heat capacity. At the same time, the functionality is expanded by measuring thermal conductivity and thermal diffusivity. The diagram shows the block diagram.

5 devices ,,

The device contains a measuring cell 1 (calorimeter) with adiabatic sheath 2, heater 3 adiabatic sheath connected to the output of block 4 adiabatic regulation, thermal converter 5 errors adiabatic regulation connected to the input of block 4 adiabatic regulation and to the input of a multi-channel analogue digital signal. Sample 7 is placed in the measuring cell 1, the Heater 8 of the sample is connected to the output of the block 9 of the heater supply of the sample. Thermal converter 10

The sample temperature 0 is connected to the input of the multichannel analog-digital converter 6. Interface 11 is connected to the timer 12, the central processing unit 13, the locking device 5 and the multichannel analog-digital converter b.

In addition, the device has a heat meter 15 connected to the input of a multichannel analog-to-digital converter b, and a thermal converter 16 temperature difference on the sample., Also connected to the input of a multichannel analog-digital converter b. The heat meter 15 and the thermoconverter 16 of the temperature difference on the sample are in the

Claims (1)

· DEVICE FOR MEASURING SPECIFIC HEAT CAPACITY OF MATERIALS, containing a calorimeter with an adiabatic shell, an adiabatic shell heater connected to an adiabatic control unit, a sample heater, a heat meter, a temperature transducer for sample temperature and a temperature transducer for adiabatic regulation, a heating interface, a power supply unit timer, central processing unit, memory unit, interface signal control panel, analog-to-digital converter, conn chenny input to the sample temperature thermal converters, and the output - to the interface, characterized in that to improve the accuracy while expanding functionality, it is further introduced differential thermoelement. temperature on the sample, digital-to-analog converter, program heating controller, analog-to-digital converter is made multi-channel and the inputs are connected to the adiabatic regulation error thermal converter and the temperature differential temperature converter on the sample and heat meter, and the sample heater power supply is connected to the interface via a digital-to-analog interface (converter and program heating controller) . >