Digital temperature measurement instrument

Abstract

The invention discloses a digital temperature measurement instrument which is formed with a single-chip microcomputer being as the core and a peripheral circuit being combined. The single-chip microcomputer adopts an ATmega16 single-chip microcomputer; a minimum system of the single-chip microcomputer is provided with a reset circuit and a crystal oscillator circuit; the downloading mode of the ATmega16 single-chip microcomputer adopts an ISP downloading mode; and a power source adopts an Lm7805 integrated voltage stabilization chip. The peripheral circuit comprises a temperature sensor circuit, a digital display circuit and a buzzer circuit, wherein the temperature sensor circuit adopts a DS18B20 sensor and adopts an external power supply mode; the digital display circuit adopts four common-anode Nixie tubes and adopts dynamic display; and the buzzer circuit is formed by a buzzer, a triode and a base electrode pull-up resistor, and adopts a low level drive mode, wherein the triode is used as a switch. The temperature measurement instrument in the invention can test and display the temperature data accurately, conveniently and quickly; and temperature measurement instrument is simple circuit, and low in cost, and has market competitiveness.

Description

technical field [0001] The invention relates to measurement, in particular to a digital temperature measuring instrument. Background technique [0002] As an important parameter, temperature plays a very critical role in industrial control, daily life and other fields. With the development of single-chip microcomputer technology, intelligence and automation have become the mainstream of today's social development, and at the same time promote the development of society. In industrial control, for the collection of temperature, the traditional method of using thermometers not only has low accuracy and poor real-time performance, but also wastes labor. It is not only labor-intensive for operators, but also for some fields. will pose a threat. Moreover, one of the biggest shortcomings of traditional temperature measurement is that it is not intuitive, and it is very inconvenient to obtain temperature information in daily life. With the development of microprocessor techn...

AI Technical Summary

Problems solved by technology

The current temperature measurement mostly uses a thermometer, which requires manual reading of the value. This measurement method is not only inconvenient to measure, but also easily increases human error during the reading process and reduces the accuracy of temperature measurement.

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