SU1732183A1 - Device for measuring temperature - Google Patents

Abstract

The invention relates to thermometry. The purpose of the invention is to improve the accuracy of temperature intention. The temperature measuring device comprises a temperature sensor connected to the information input of an analog-digital converter and a recording unit. A linear-memory number constant-memory block, connected by address inputs directly to the outputs of the analog-digital converter, and a digital adder, connected by an output to the input of the digital recording unit, are entered into the device. Moreover, the digital adder is connected by the first group of inputs directly to the outputs of the analog-digital converter and connected by the second group of inputs directly to the outputs of the constant-memory number block of the linearization number. 1 il.

Description

The invention relates to geometry,

A device for measuring temperature is known, comprising a temperature sensor connected to an analog-to-digital converter (ADC), to the second input of which the output of the control circuit is connected, and the outputs of the ADC are connected to the inputs of the buffer block, the decoder and the recording block,

However, this device does not have the required measurement accuracy.

The closest to the present invention is a temperature measuring device comprising a temperature sensor, an analog-to-digital converter, a buffer unit, a decoder control circuit t, a pulse distributor, a switch, a microprocessor, and a recording unit.

The known device is very complex and, as a result, has low reliability.

The purpose of the invention is to improve the accuracy of temperature measurement.

This goal is achieved in that a temperature measuring device connected to the information input of an analog-digital converter and a recording unit is inserted into a linearization number constant-memory unit connected by address inputs directly to the outputs of the analog-digital converter. and digital adder, plug 41

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The output is connected to the input of the digital registration unit, the digital adder is connected by the first group of inputs directly to the outputs of the analog-digital converter and connected by the second group of inputs directly to the outputs of the block of permanent memory of the linearization number.

The drawing shows the block diagram of the proposed device,

The device comprises a temperature sensor 1, an analog-to-digital converter 2, a block 3 of the permanent memory of the linearization number 3, an adder h and a block 5 of registration.

The device works as follows.

The temperature to be measured acts on the temperature sensor 1. The output signal of the temperature sensor is fed to analog-to-digital converter 2, which forms the code of the number of the output parameter of the sensor. This code goes to the first inputs of the adder k and to the address inputs of the block 3 of the permanent memory of the linearization number. In block 3 of the permanent memory of the linearization number at this address, the number of the number required for linearization of the characteristic of the temperature sensor at this point is recorded. From the output of block 3, the code of the number goes to the second inputs of the adder k, where the summation of the codes of numbers from the analog-digital converter 2 and the block 3 of the permanent memory of the linearization number takes place. At the output of the adder D, a code of a number is formed, which corresponds to a linear characteristic, which is fed to the registration unit 5.

If the temperature sensor 1 is real at the early point

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is below linear, then the code number

in block 3 of the permanent memory, the linearization number is written in the forward code, t (e, the code of the number of the analog-to-digital converter 2 and the code of the number of the block 3 of the permanent linearization memory are summed up.

If at this point the real characteristic of temperature sensor 1 is higher than the linear one, then the code of the number in block 3, the permanent memory of the linearization number is written in the additional code, i.e. subtracting from the code of the analog-to-digital converter number 2 of the code and the number of the constant memory number 3 of the linearization number. As a result, the number 5 code from the output of the adder k always receives the code of the number corresponding to the linear characteristic of the temperature sensor.

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Claims (1)

An apparatus for measuring temperature, comprising a temperature sensor connected to an information input of an analog-digital converter, and a recording unit, characterized in that, in order to improve the accuracy of temperature measurement, a linearization number constant-memory block is inserted into it, connected by address inputs directly to the outputs of the analog-to-digital converter, and a digital adder connected by an output to the input of a digital recording unit, the digital adder being connected to the first group ppoy inputs directly to the outputs of the analog-to-digital converter and is connected by a second group of inputs directly to the outputs of the block of permanent memory of the linearization number five 0 five 0 An apparatus for measuring temperature, comprising a temperature sensor connected to an information input of an analog-digital converter, and a recording unit, characterized in that, in order to improve the accuracy of temperature measurement, a linearization number constant-memory block is inserted into it, connected by address inputs directly to the outputs of the analog-to-digital converter, and a digital adder connected by an output to the input of a digital recording unit, the digital adder being connected to the first group ppoy inputs directly to the outputs of the analog-to-digital converter and is connected by a second group of inputs directly to the outputs of the block of permanent memory of the linearization number Have four