CN104048700A

CN104048700A - Temperature and humidity measurement instrument

Info

Publication number: CN104048700A
Application number: CN201410286770.7A
Authority: CN
Inventors: 徐良贵; 吕正连
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-06-25
Filing date: 2014-06-25
Publication date: 2014-09-17

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

A kind of temp .-humidity measuring apparatus

Technical field

The present invention relates to measurement mechanism, specifically relate to the measurement mechanism of humiture.

Background technology

Temperature, humidity be life and produce in the most basic physical quantity, research shows, temperature and humidity has inseparable relation, people's body sense is not subject to merely temperature or the impact of humidity, but the result of both combined actions.So under certain temperature conditions, the humidity of air also will keep relative stablizing.Also just therefore, the corresponding appearance of the saying of humiture one.Yet in modern industrial and agricultural development, humiture is also inseparable factor, along with the raising of people's living standard, people more and more pay close attention to the living environment of oneself.And the variation of humiture and the comfort level of human body and mood have direct impact in air, no matter be booth, laboratory, flower nursery, or indoor, all involves our health problem, thereby people have to again inquire into this problem, the growth of plant will just can be grown up healthy and sound in certain temperature humidity range, and animal is really, the mankind require higher relatively, react also obvious, row as, indoor humidity is also unsuitable too high or too low, indoor humidity is too high, and human-body radiating is just more difficult.Indoor humidity is too low, and air is dry, and people's respiratory tract can dry and astringently be felt bad.

Indoor temperature is unsuitable too high also unsuitable too low.If indoor temperature is too high, people usually can feel muggy and oppressive, and dizzy brain rises, lassitude.And live in for a long time higher indoor of temperature, there will be eyes dry and astringent, the phenomenon of mouth parched and tongue scorched.Yet indoor temperature is too low also bad, people can feel cold, the easy frostbite of trick, and also in order to adapt to indoor temperature, human body will produce a large amount of heat energy, consumed energy.

Indoor temperature, humidity not only have impact to health, and depositing of article also had to impact.Along with social fast development, the control of humiture becomes the popular project of research, and traditional Temperature and Humidity Control is to utilize the test equipment such as hair hygrometer, humidometer, humidity test paper and dual metal type meter.By manually detecting.The temperature, the humidity that are mainly used in some storehouse do not meet standard, then dry, the operation such as cooling.Manual testing's method can not accomplish to react in time humiture situation at that time, and wastes time and energy, and efficiency is low, and error is large, also just because so just need a kind of cheap, easy to use and calculate accurate Temperature and Humidity Control instrument.

Summary of the invention

The object of this invention is to provide a kind of temp .-humidity measuring apparatus, reach the object to the Detection & Controling of temperature humidity.

Technical scheme of the present invention is: a kind of temp .-humidity measuring apparatus, includes humiture collection part, main control module, display module and alarm module 4 parts; Described main control module is core, adopts STC89C52 single-chip microcomputer, and described humiture collection partly adopts DHT11 digital hygro sensor, and digital hygro sensor comprises the wet element of a resistance-type sense and a NTC temperature element; The P2.0 mouth that DHT11 digital hygro sensor connects STC89C52 single-chip microcomputer is used for receiving and dispatching serial data, between the Pin2 of digital hygro sensor mouth and power supply, is connected a 5K resistance; And the power port Pin1 of sensor and Pin4 connect respectively VDD and the GND end of single-chip microcomputer; The tripod of digital hygro sensor suspends and places; Display module adopts 1602 LCDs, connects as follows: the 1st pin: GND is power supply ground; The 2nd pin: VCC connects 5V positive source; The 3rd pin: V0 is liquid crystal display contrast adjustment end, and while connecing positive supply, contrast is the most weak, and during earthing power supply, contrast is the highest, uses the potentiometer of a 10K to adjust contrast; The 4th pin: RS is that register is selected, selection instruction register while selecting data register, low level 0 during high level 1; The 5th pin: RW is reading writing signal line, carries out read operation during high level 1, carries out write operation during level 0; The 6th pin: E (or EN) end is for enabling (enable) end, and reading information during high level 1, carries out instruction during negative saltus step; 7th～14 pin: D0～D7 is 8 bi-directional data ends; 15th～16 pin: empty pin or back of the body lamp power supply; The 15 instep light positive utmost points, 16 instep light negative poles; Alarm module is mainly hummer, is accessed STC89C52 single chip circuit.

Temp .-humidity measuring apparatus of the present invention carrys out collecting temperature by digital hygro sensor DHT11, humidity data, and instantaneous transmission is to single-chip microcomputer; Data are passed to after single-chip microcomputer, and the signal that be subject to is analyzed and processed, and the humiture real time data collecting is transported to 1602 LCDs; The data that then complete humiture by 1602LCD liquid crystal display show; By different humiture upper lower limit values is set, access hummer, realizes off-limit alarm; The present invention is simple in structure, line is convenient, does not need extra welding, has temperature control, wet precision is high, function is strong, volume is little, price is low, and the advantages such as simple and flexible, have well met technological requirement.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of main control module;

Fig. 2 is Temperature Humidity Sensor circuit diagram.

Embodiment

A temp .-humidity measuring apparatus, includes humiture collection part, main control module, display module and alarm module 4 parts; Described main control module is core, adopts STC89C52 single-chip microcomputer, and described humiture collection partly adopts DHT11 digital hygro sensor, and digital hygro sensor comprises the wet element of a resistance-type sense and a NTC temperature element; The P2.0 mouth that DHT11 digital hygro sensor connects STC89C52 single-chip microcomputer is used for receiving and dispatching serial data, between the Pin2 of digital hygro sensor mouth and power supply, is connected a 5K resistance; And the power port Pin1 of sensor and Pin4 connect respectively VDD and the GND end of single-chip microcomputer; The tripod of digital hygro sensor suspends and places; Display module adopts 1602 LCDs, connects as follows: the 1st pin: GND is power supply ground; The 2nd pin: VCC connects 5V positive source; The 3rd pin: V0 is liquid crystal display contrast adjustment end, and while connecing positive supply, contrast is the most weak, and during earthing power supply, contrast is the highest, uses the potentiometer of a 10K to adjust contrast; The 4th pin: RS is that register is selected, selection instruction register while selecting data register, low level 0 during high level 1; The 5th pin: RW is reading writing signal line, carries out read operation during high level 1, carries out write operation during level 0; The 6th pin: E (or EN) end is for enabling (enable) end, and reading information during high level 1, carries out instruction during negative saltus step; 7th～14 pin: D0～D7 is 8 bi-directional data ends; 15th～16 pin: empty pin or back of the body lamp power supply; The 15 instep light positive utmost points, 16 instep light negative poles; Alarm module is mainly hummer, is accessed STC89C52 single chip circuit.

Claims

1. a temp .-humidity measuring apparatus, is characterized in that it includes humiture collection part, main control module, display module and alarm module 4 parts; Described main control module is core, adopts STC89C52 single-chip microcomputer, and described humiture collection partly adopts DHT11 digital hygro sensor, and digital hygro sensor comprises the wet element of a resistance-type sense and a NTC temperature element; The P2.0 mouth that DHT11 digital hygro sensor connects STC89C52 single-chip microcomputer is used for receiving and dispatching serial data, between the Pin2 of digital hygro sensor mouth and power supply, is connected a 5K resistance; And the power port Pin1 of sensor and Pin4 connect respectively VDD and the GND end of single-chip microcomputer; The tripod of digital hygro sensor suspends and places; Display module adopts 1602 LCDs, connects as follows: the 1st pin: GND is power supply ground; The 2nd pin: VCC connects 5V positive source; The 3rd pin: V0 is liquid crystal display contrast adjustment end, and while connecing positive supply, contrast is the most weak, and during earthing power supply, contrast is the highest, uses the potentiometer of a 10K to adjust contrast; The 4th pin: RS is that register is selected, selection instruction register while selecting data register, low level 0 during high level 1; The 5th pin: RW is reading writing signal line, carries out read operation during high level 1, carries out write operation during level 0; The 6th pin: E (or EN) end is for enabling (enable) end, and reading information during high level 1, carries out instruction during negative saltus step; 7th～14 pin: D0～D7 is 8 bi-directional data ends; 15th～16 pin: empty pin or back of the body lamp power supply; The 15 instep light positive utmost points, 16 instep light negative poles; Alarm module is mainly hummer, is accessed STC89C52 single chip circuit.