CN202956494U

CN202956494U - Meteorological element measurement system

Info

Publication number: CN202956494U
Application number: CN 201220645739
Authority: CN
Inventors: 郭业才; 刘晓力; 张秀再; 刘晓明
Original assignee: Nanjing University of Information Science and Technology
Current assignee: Nanjing University of Information Science and Technology
Priority date: 2012-11-30
Filing date: 2012-11-30
Publication date: 2013-05-29
Anticipated expiration: 2022-11-30

Abstract

The utility model relates to a meteorological element measurement system which comprises a clock module, a buzzer module, a temperature sensor module, a humidity sensor module, a main control unit, a liquid crystal module and a button control module. The clock module, the buzzer module, the temperature sensor module, the humidity sensor module, the liquid crystal module and the button control module are respectively connected with the main control unit. The meteorological element measurement system is high in data accuracy, good in stability, low in cost and easy in hardware circuit achievement through actual operation.

Description

The meteorological element measuring system

Technical field

The utility model relates to a kind of meteorological element measuring system technical field, relates in particular to temperature, and the measuring technique of humidity.

Background technology

In the measurement of numerous meteorological elements, temperature, humidity and the mankind's production, life have close relationship, are also the weather informations that in life, people relatively pay close attention to simultaneously.At present, the method for measuring temperature is a lot, mainly contains:

Utilize the object principle of expanding with heat and contracting with cold to carry out thermometric.Mercury thermometer for example, although can be widely used in various temperature survey occasions.Its shortcoming is can only close-in measurement, easily fragmentation.Other also have some is to inject alcohol, the thermometer of kerosene, but shortcoming is arranged is exactly that the precision measured is not accurate enough for these.

The method of thermoelectric effect.This detector unit mainly consists of thermopair.Utilize thermopair to come the method comparative maturity of thermometric also widely, to use it now.That the thermopair advantage has is simple in structure, temperature measurement range is large, precision is high, thermal inertia is little etc.Its shortcoming is linear bad, and cold junction needs temperature compensation.

Common humidity measuring method has: dynamic method (two platen presses, two wet method, shunting), static method (saturated salt method, sulfuric acid process), dew point method, measurement with wet bulletin.In these measuring methods, some equipment complexity, what have will go balance for a long time, and what have requires ventilation state good.Therefore, if adopt above humidity measuring method, implement comparatively difficulty.

Summary of the invention

Technical problem to be solved in the utility model is the deficiency for the above-mentioned background technology, has designed a kind of meteorological element measuring system based on single chip computer AT 89S51.

Concrete technical scheme of the present utility model is as follows:

A kind of meteorological element measuring system comprises: clock module, hummer module, temperature sensor module, humidity sensor module, main control unit, Liquid Crystal Module and key control module; Wherein, clock module, hummer module, temperature sensor module, humidity sensor module, Liquid Crystal Module and key control module are connected with main control unit respectively.

Described clock module is connected with main control unit, for liquid crystal display provides the time on date;

Described temperature sensor module, humidity sensor module are connected with main control unit respectively, for liquid crystal display provides temperature and humidity;

Described Liquid Crystal Module is connected with main control unit, is used for showing required data message;

Described key control module is connected with main control unit, is used for arranging the date time parameter;

Described hummer module is connected with main control unit, when temperature surpasses setting value, is reported to the police.

Described main control unit comprises single-chip microcomputer, crystal oscillating circuit and reset circuit.

Institute's hummer module mainly comprises triode 8550 and hummer SB, adopts triode 8550 to drive the hummer sounding, and triode 8550 is connected to the P3.0 interface of single-chip microcomputer by current-limiting resistance R7.

Temperature sensor module, humidity sensor module have adopted respectively DS18B20 temperature sensor and HS1101 humidity sensor.The 1 pin ground connection of temperature sensor DS18B20,2 pin connect the P3.2 interface of single-chip microcomputer; 3 pin connect the anode of power module; Humidity sensor self serves as in electric capacity access timer 555 circuit, 3 pin of timer 555 and the P3.4 interface of single-chip microcomputer.

Clock module adopts the DS12C887 clock chip.This clock chip has good performance, the data hold capacity, for native system mainly provide year, month, day, week, the time, the information such as minute, second.

The utlity model has following beneficial effect:

The utility model adopts temperature sensor DS18B20 to be used for testing temperature, adopts humidity sensor HS1101 and timer 555 to measure humidity, and is provided with the DS12C887 clock chip.Added hummer in circuit, made temperature surpass preset value and reported to the police.And can on liquid crystal, show date time, temperature, humidity.This design has temperature control, wet precision is high, function is strong, volume is little, cost is low, and the advantages such as simple and flexible, well met designing requirement.

The accompanying drawing explanation

The structural drawing that Fig. 1 is native system.

The pinouts that Fig. 2 is the AT89S51 chip.

The circuit diagram that Fig. 3 is reset circuit.

The circuit diagram that Fig. 4 is the crystal oscillator module.

Fig. 5 is the Liquid Crystal Module circuit diagram.

Fig. 6 is the clock module circuit diagram.

Fig. 7 is temperature sensor circuit figure.

Fig. 8 is humidity sensor circuit figure.

Fig. 9 hummer module circuit diagram.

Embodiment

Technical scheme below in conjunction with accompanying drawing to the design is elaborated:

As shown in Figure 1, meteorological element measuring system of the present utility model comprises: clock module, hummer module, temperature sensor module, humidity sensor module, main control unit, Liquid Crystal Module and key control module; Wherein, clock module, hummer module, temperature sensor module, humidity sensor module, Liquid Crystal Module and key control module are connected with main control unit respectively.

Main control unit comprises single chip computer AT 89S51, clock circuit and reset circuit.The pinouts of single chip computer AT 89S51 chip as shown in Figure 2.Reset circuit as shown in Figure 3, is connected with 9 pin of single-chip microcomputer.The crystal oscillator module is connected with 18,19 pin of single-chip microcomputer as shown in Figure 4.Single-chip microcomputer is as the control section of whole technical scheme, and the groundwork completed is LCD is calculated and be transferred to the test data of temperature, humidity sensor show.If measured temperature, humidity surpass settings, hummer will send buzzing and report to the police.

Liquid Crystal Module as shown in Figure 5, its adopts LCD liquid crystal display, is used for the meteorological element numerical value that shows date and test, as the time on date of read clock chip, the information such as the humiture of sensor.4,5, No. 6 pin of liquid crystal circuit are connected with single-chip microcomputer P1.0, P1.1, P1.2 mouth respectively, and the 7-14 pin is connected with P0.0-P0.7 respectively, and No. 15 pin is connected with P1.6.

The connecting circuit figure that Fig. 6 is clock chip and single-chip microcomputer, for single-chip microcomputer provides the external clock frequency.The 4-11 pin of DS12C887 clock chip is connected with single-chip microcomputer P2.0-P2.7 respectively, and 13,14,15 pin are connected with P1.3, P1.4, P1.5 respectively, and No. 17 pin is connected with P1.7

Fig. 7 is temperature sensor figure, is used for the test environment temperature.1 pin ground connection of temperature sensor, 2 pin connect the P3.2 mouth of single-chip microcomputer, and 3 pin connect power supply.

The connection layout that Fig. 8 is humidity sensor and timer 555 circuit.3 pin of timer 555 are connected with the P3.4 of single-chip microcomputer.Humidity sensor is as the electric capacity of the multivibrator consisted of 555 timers, and the corresponding square-wave signal frequency that also can export by multivibrator of the value of ambient humidity and capacitance is calculated by single-chip microcomputer.

Fig. 9 is buzzer circuit, with the P3.0 mouth of single-chip microcomputer, is connected.When temperature, humidity arrive setting value, a low level of P3.0 mouth output of single-chip microcomputer makes the triode conducting, and hummer sends chimes of doom.

Key-press module is mainly used to carry out the selection of Time of Day and regulated.

Claims

1. meteorological element measuring system, it is characterized in that: it comprises clock module, hummer module, temperature sensor module, humidity sensor module, main control unit, Liquid Crystal Module and key control module; Wherein clock module, hummer module, temperature sensor module, humidity sensor module, Liquid Crystal Module and key control module are connected with main control unit respectively.

2. meteorological element measuring system according to claim 1, it is characterized in that: described main control unit comprises single-chip microcomputer, crystal oscillating circuit and reset circuit.

3. meteorological element measuring system according to claim 2, it is characterized in that: institute's hummer module mainly comprises triode and hummer.

4. meteorological element measuring system according to claim 2, it is characterized in that: temperature sensor module, humidity sensor module adopt respectively temperature sensor DS18B20 and humidity sensor HS1101.

5. meteorological element measuring system according to claim 2, is characterized in that: clock module employing DS12C887 clock chip.