Temperature and humidity measurement instrument

Abstract

The invention discloses a temperature and humidity measurement instrument. The temperature and humidity measurement instrument comprises a temperature and humidity acquisition part, a master control module, a display module and an alarm module. The master control module is used as a core, an STC89C52 single-chip microcomputer is adopted, and a DHT11 digital temperature and humidity sensor is adopted in the temperature and humidity acquisition part and the temperature and humidity acquisition part comprises a resistance humidity sensing element and an NTC temperature detecting element. The DHT11 digital temperature and humidity sensor is connected with a port P2.0 of the STC89C52 single-chip microcomputer for receiving and transmitting serial data, and a 5K resistor is connected between a port Pin2 of the digital temperature and humidity sensor and a power supply. A power port Pin1 and a power port Pin4 of the sensor are connected with the VDD end and the GND end of the single-chip microcomputer respectively, and a third pin of the temperature and humidity sensor is suspended. A 1602 liquid crystal display screen is adopted in the display module, and the alarm module is mainly a buzzer. The temperature and humidity measurement instrument has the advantages of being high in accuracy and functionality, small in size, low in price, simple, flexible and the like.

Description

technical field [0001] The invention relates to a measuring device, in particular to a measuring device for temperature and humidity. Background technique [0002] Temperature and humidity are the most basic physical quantities in life and production. Studies have shown that temperature and humidity are closely related. Human body sensation is not simply affected by temperature or humidity, but the result of the combined effect of the two. Therefore, under certain temperature conditions, the humidity of the air should also be kept relatively stable. It is precisely because of this that the saying that temperature and humidity are integrated appears correspondingly. However, in the development of modern industry and agriculture, temperature and humidity are also inseparable factors. With the improvement of people's living standards, people pay more and more attention to their living environment. The change of temperature and humidity in the air has a direct impact ...

AI Technical Summary

Problems solved by technology

The manual test method cannot reflect the current temperature and humidity conditions in a timely manner, and it is time-consuming and laborious, with low efficiency and large errors. It is for this reason that a low-cost, easy-to-use and accurate temperature and humidity control instrument is needed.

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