SU1081439A1 - Device for measuring temperature - Google Patents

Abstract

A DEVICE FOR MEASURING A TEMPERATURE containing a thermal converter connected to the input of a converter of a thermal converter in a time interval. the output of which is connected to a control input of a key connecting a counting pulse generator with a clock input of a binary number counter, the output of which is connected to a digital display unit, a memory block whose address inputs are connected to a binary counter output and output connected to binary inputs - a home counter, a write pulse shaper, characterized in that, in order to improve the accuracy of measurement of darkness,. A programmable binary counter has been entered into it, the clock input of which is connected to the key output, the recording input is entered to the output of the record impulse recorder ,,. Information (Lation input is connected to the memory block output, and the output is connected to the clock input of the binary counter and B54 to driver write pulse. 00; D

Description

The invention relates to the field of temperature measurements, namely, devices for measuring temperature with correction of non-linearity of a temperature transducer, and can be used for accurate temperature measurements with the presentation of the measurement result in digital form. A temperature measuring device is known, which contains a thermal converter connected to the converter input of a thermal converter in a time interval, the output of which is connected to a control input of a switch connecting a counting pulse generator to an input of a binary-decimal counter, a binary counter whose input is connected with the output of the key, and the output is connected to the memory unit connected to the binary-decimal counter, the digital display unit C13. The drawbacks of the device are low speed and low measurement accuracy. The closest to the invention to the technical essence is a device for temperature measurement containing a thermal converter connected to the converter input of the thermal converter in the time interval, the output of which is connected to the generator of the counting pulses with a clock input of a binary-decimal counter, the output of which is connected to a digital display unit, a memory unit, address inputs to The output is connected to the output of the binary counter, and the output is connected to the information inputs of the binary-decimal counter, recording pulse shaper 2, the device has the disadvantage of low measurement accuracy due to the fact that the measurement result is corrected at regular intervals of the measured temperature , which leads to an increase in the values of correction numbers in the case of an increase in the range of measured temperatures with a constant volume of the memory block and ultimately to a decrease in the measurement accuracy. The increase in the volume of the memory block leads to a complication of the device, an increase in its cost and a decrease in reliability. The aim of the invention is to improve the measurement accuracy. The goal is achieved by the fact that a temperature measuring device containing a thermocouple connected to the input of the converter of the thermoconverter in the time interval whose output is connected to the control input of the key, (:: ioding the i-pulse of the counting pulses with the such1). a binary-decimal counter, the output of which is connected to a digital display unit, a memory block, the address inputs of which are connected to the output of a binary counter, and the output is connected to information inputs of a binary-decimal About the counter, a write pulse shaper, a programmable binary counter has been entered, the clock input of which is connected to the key output, the write input with the output of the write pulse shaper, the information input is connected to the output of the memory unit, and the output is connected to the clock input of the binary counter and the write pulse shaper. The drawing shows the block diagram of the device. The device contains a thermal converter 1, a converter of a thermal converter signal 2 in a time interval, a key 3, a generator of 4 counting pulses, a binary-decimal counter 5, a programmable binary counter 6, a write pulse driver 7, a binary counter 8 ,. memory block 9 and digital display unit 10. The device works as follows. The number of pulses at the output of the key, proportional to the electrical signal of the thermal converter, is supplied to the binary-decimal counter 5, and also by means of a programmable counter b to the input of the binary counter 8. The number of pulses counted by the counter 8 determines the address in memory block 9 of the memory. Two numbers are recorded under each memory address. The first number corresponds to the deviation of the conversion function from linear. The second number sets the length of the portion of the measurement range for which the first number remains unchanged. The output of the memory block is connected to the information inputs of the programmable binary counter b and the binary-decimal counter 5, so that the first number stored in the memory block cell is fed to the counter 5, and the second to the counter b. Counter 5 starts counting with the number present on its information input. Thus, the correction of the non-linearity of the thermal converter is carried out. Counter 6 divides the number of pulses from the key to the input of the binary counter of address 8, and the division factor depends on the number present in the information input of counter 6. Thus, the address increment is controlled according to the program recorded in

3 1081439 .4

memory block 9. Shaper 7 im memory only when necessary

pulse recording provides a record of changing the correction number. it

to the counter b of the new number with the output to a significant decrease in the memory coliblock immediately after the number of the necessary addresses of the block

change the address value. This allows for an equal volume

Thus, in the device, it is possible to set 5 memory to increase, as compared with the length of each step of the change, the co-address is known by the well-known device, which, in turn, allows the number to be corrected

It is necessary to activate the new cell measurement.

Claims (1)

A TEMPERATURE MEASURING DEVICE comprising a thermocouple connected to the input of a thermocouple signal converter in a time interval, the output of which is connected to a control input of a key connecting a counting pulse generator to a clock input of a binary decimal counter, the output of which is connected to a digital display unit, a memory block whose address inputs are connected to the output of the binary counter, and the output is connected to the information inputs of the binary decimal counter, write pulse shaper , characterized in that, in order to improve the accuracy of measuring the temperature it introduced a programmable binary counter, a clock input coupled to an output _{from a} key, record entry - with the output, the <Q tors, momentum zapisiinformatsionny input - with the output of the storage unit, and an output connected to the clock input of the binary counter and an input of the recording pulse.