SU901842A1 - Device for measuring temperature - Google Patents

Description

(54) DEVICE FOR TEMPERATURE MEASUREMENT

I

This invention relates to thermometry.

A device for measuring is known.

temperature}, which contains a temperature sensor, connected to the converter input, a control circuit, an IJ recording unit.

However, such a device does not have the required measurement accuracy due to the error due to the functional transducer and the source of the sawtooth voltage.

Closest to the present invention is a temperature measuring device comprising a temperature sensor connected to an analog-digital converter, to the second input of which the output of the control circuit is connected, and the outputs of the analog-digital converter are connected to the inputs of the buffer block, the decoder and the recording block

However, the known device does not have the required measurement accuracy, since the cascade-storage circuits of the device realize only an approximate value of the output characteristic of the sensor, and the control pulse generator has a limited clock frequency.

The purpose of the invention is to increase the measurement accuracy.

The goal is achieved by introducing a switch, a microprocessor and a pulse distributor into the device, whose input is connected to the B.TpiOMY output cxei "a control, and control its outputs - to the inputs of a series-connected buffer block, a decoder and a switch that is connected via a microprocessor to the registration unit

The drawing shows a block diagram of the proposed device.

 The device contains a temperature sensor I analog-to-digital converter 2, a buffer unit 3, a control circuit 4, a decoder 5, distribution

a divider 6 pulses, a switch 7, a microprocessor 8 and a registration unit 9.

Digital temperature meter works as follows.

The temperature to be changed {Euenium affects the thermal sensors with 1. The output signal of the sensor enters analog-to-digital converter 2, which at the time of the end of the conversion generates a code for the number of the output parameter of the sensor entering the buffer device 3.

The temperature is calculated using a multichannel pulse distributor 6, each pulse of which acts on the microprocessor 8 as an operating command. In addition, the pulse distributor controls the operation of the buffer device 3 and the decoder 5.

On the Start command, the analog-to-digital converter 2 is started from the control circuit 4, and then the pulse distributor 6, which starts the process of controlling the temperature calculation using the forgus code in the buffer device 3.

The first pulses of the distributor 6 interrogate the buffer device 3, transfer its contents to the decoder 5, the output of which forms a numerical equivalent of the buffer device code and enter the contents of the decoder into the microprocessor

The following pulses of the distributor 6 control the operation of the microprocessor itself, which calculates the temperature value. Rezul424

The calculation mat is digitally generated by a recording device 9. Next, the conversion and calculation cycle is repeated automatically.

The proposed device has compared with a known higher measurement accuracy, which will allow to successfully solve technological problems of production.

Claims (2)

1. USSR author's certificate 488092, cl. G 01 K 7/02, 25.06.73. 2. US patent number 3843872, cl. 235/92, 10/22/74 (prototype).