CN201060005Y

CN201060005Y - Store house temperature humidity detector

Info

Publication number: CN201060005Y
Application number: CNU2007201047782U
Authority: CN
Inventors: 韩广勋
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-07-06
Filing date: 2007-07-06
Publication date: 2008-05-14
Anticipated expiration: 2017-07-06

Abstract

The utility model relates to a warehouse temperature-moisture detector, which is characterized in that a circuit of the detector consists of a main control chip AT89S51 single-chip, a smoke detection circuit, a temperature-moisture detection circuit, a press-key circuit, a LED indicator-light circuit, a liquid crystal display circuit, an alarming circuit, a power-supply circuit and a crystal-vibration restoration circuit. The warehouse temperature-moisture detector can detect the current temperature or the moisture of the warehouse, and display the temperature or the moisture on the liquid crystal display; when the moisture or the temperature inside the warehouse is lower (or higher) than the lower limit (or the upper limit) of the designed range, or the fire is detected in the warehouse, a buzzer sounds the alarm. The utility model has stable working, simple and convenient operation, low cost and reliable working, and can be applicable to the ordinary warehouse or the warehouse having higher requirement. Since the probability of the fire or the sudden change of the temperature or the moisture is small, and even the fire or the sudden change of the moisture or the temperature is happened, the time is short; thereby a major environment of the warehouse conforms to the conditions. Only one VL6 indicator light is on, so the electric power consumption is very small. In addition, the circuit of the device is simple, thereby being convenient for the mass production.

Description

Warehouse temperature humidity detecting device

Technical field

The utility model relates to pick-up unit, specifically warehouse temperature humidity detecting device.

Background technology

Generally all there is the requirement and the fire alarm of temperature, humidity in the warehouse of storage goods and materials now, in order to avoid the warehouse breaking out of fire causes great property loss.But when addressing these problems, general equipment therefor all is a function singleness, as independent detection humidity or temperature, adds fire alarm equipment.Can only detected temperatures or humidity during detection, and can not handle accordingly in temperature, when humidity is undesirable, make complicated operationization, increase storekeeper's burden, and the use cost height.

Summary of the invention

The purpose of this utility model provides and a kind ofly can detect the warehouse temperature and humidity, and can be to whether the warehouse temperature humidity detecting device that the condition of a fire is reported to the police takes place.

The technical solution of the utility model is: temperature humidity detector circuit part in warehouse is by main control chip AT89S51 single-chip microcomputer and Smoke Detection circuit, humiture testing circuit, key circuit, LED light circuit, liquid crystal display circuit, warning circuit and power circuit and crystal oscillator reset circuit (peripheral circuit) formation; The Smoke Detection circuit is connected on the single-chip microcomputer by single-chip microcomputer INT1 mouth, key circuit is received single-chip microcomputer P3.0-P3.2 mouth (with setup parameter), the humiture testing circuit is connected to single-chip microcomputer P0.0, the P0.1 mouth is (to accept the clock signal of single-chip microcomputer, and temperature-humidity signal passed to single-chip microcomputer), the LED light circuit is connected on the P1.0-P1.5 mouth of single-chip microcomputer, the liquid crystal display circuit data line connects the P2.0-P2.7 mouth (carrying out exchanges data with single-chip microcomputer) of single-chip microcomputer, the liquid crystal display circuit control line is received the P3.5-P3.7 (with control output) of single-chip microcomputer, warning circuit is connected to the P1.6 mouth of single-chip microcomputer, reset key in the peripheral circuit is connected on the RST mouth of single-chip microcomputer, crystal oscillating circuit is connected on the XTAL1 and the XTAL2 of single-chip microcomputer, power circuit single-chip microcomputer VCC mouth connects+5V voltage, GND mouth ground connection.

Wherein: the Smoke Detection circuit is by gas sensor QM-N5, and V1 and relevant peripheral components thereof are formed; The humiture testing circuit is made up of Temperature Humidity Sensor SHT11 and peripheral cell thereof; Liquid crystal display circuit is made up of with relevant peripheral components the 1602A Liquid Crystal Module; Warning circuit is by hummer FMQ, and V2 and peripheral cell thereof are formed; The LED light circuit is made up of six LED lamps and current-limiting resistance; Key circuit is made up of 4 buttons and peripheral cell thereof; Power circuit comprises transformer T, rectifier bridge VD2-VD5, mu balanced circuit 7805 and filter capacitor, and the crystal oscillator reset circuit has crystal oscillator, button and peripheral cell.

Technique effect of the present utility model is as follows:

1. detect the temperature or the humidity in current warehouse, and on LCD, show, when the humidity in the warehouse or temperature are lower than the lower limit (or upper limit) that (or being higher than) set scope, buzzer warning;

2. in the detection warehouse whether the condition of a fire takes place, when in the warehouse condition of a fire being arranged, buzzer warning;

3. all just often only light pilot lamp VL6 (this device has independently power supply) in the warehouse, can directly power with power for illumination.

If the temperature that adopts above device to manage the warehouse, whether humidity and fire take place, and then can make things convenient for the storekeeper greatly.Temperature Humidity Sensor and smoke transducer are installed in the correct position in the warehouse, and pilot lamp and display part are installed in the place that the storekeeper easily touches.Then the storekeeper need not enter the warehouse and just can understand corresponding situation (comprise and obtain parameter accurately) in the warehouse.When pilot lamp VL6 lights, show that all are normal.When humiture or when having fire to take place, corresponding indication is arranged, the storekeeper can meet the requirements according to the indication storage condition that guarantees the warehouse that takes appropriate measures.

The utility model working stability, easy and simple to handle, cost is very low, and reliable operation is used in warehouse general or that have relatively high expectations.Because the probability of breaking out of fire or temperature humidity sudden change is all very little, even take place, the time is also very short, so the environment overwhelming majority in warehouse all is qualified.At this moment, have only a VL6 pilot lamp bright, power consumption is extremely small.This device circuit is easy in addition, is convenient to produce in batches.

Description of drawings

Fig. 1 is a circuit block diagram of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model.

Embodiment

Circuit in the warehouse of the present utility model temperature humidity detecting device is made of main control chip AT89S51 single-chip microcomputer and Smoke Detection circuit, humiture testing circuit, key circuit, LED light circuit, liquid crystal display circuit, warning circuit and peripheral circuit (comprising power circuit and crystal oscillator reset circuit).Wherein:

The Smoke Detection circuit is by gas sensor QM-N5, and V1 and relevant peripheral components thereof are formed.Gas sensor QM-N5 when not detecting smog, its A, the resistance between the B two ends is very big, the B point voltage is lower, V1 is in cut-off state, making single-chip microcomputer P3.3 mouth is high level.When gas sensor detects smog, its A, the resistance decreasing between the B two ends raises the B point voltage, the V1 conducting, single-chip microcomputer P3.3 mouth is a low level.Single-chip microcomputer detects the negative edge signal, just makes corresponding Interrupt Process.When smog dispersed, gas sensor A recovered high value between the B, V1 is ended.The function of this part circuit is the smog when detecting breaking out of fire, to judge whether breaking out of fire.

The humiture testing circuit is made up of Temperature Humidity Sensor SHT11 and peripheral cell thereof.Temperature Humidity Sensor SHT11 is integrated into functions such as temperature sensing, humidity, signal transformation, A/D conversion and well heater on the chip.SHT11 visits by the two wires digital serial interface, so hardware interface circuit is very simple.The place that should be noted that is: the DATA data line needs external pull-up resistor, and clock line SCK is used for communication synchronization between microprocessor and the SHT11.SHT11 can directly export digital quantity humiture value by the DATA data bus.This value is called " humiture relatively ", need carry out just obtaining humidity value comparatively accurately after linear compensation and the temperature compensation.Can compensate humiture with the data of software, make the value of measurement more accurate according to chip.

Liquid crystal display circuit is made up of 1602A Liquid Crystal Module and corresponding peripheral cell.Show current temperature and humidity value with LCD.Can content displayed many, power consumption be few, friendly interface.

Warning circuit is by hummer FMQ, and V2 and peripheral cell thereof are formed.When the P1.6 output low level, not conducting of V2, hummer is sounding not.When P1.6 output high level, V1 conducting, hummer sounding alarm.

The LED light circuit is made up of six LED lamps and current-limiting resistance.When P1.0-P1.5 output high level, six pilot lamp do not work.When needs are lighted corresponding lamp, only need this mouth to put low level and get final product.When: VL6 lights, and situation is normal in the expression warehouse; VL5 lights, breaking out of fire in the expression warehouse; VL1 lights, and the present temperature in expression warehouse is higher than the upper limit; VL2 lights, and the present temperature in expression warehouse is lower than lower limit; VL3 lights, and the present humidity in expression warehouse is higher than the upper limit; VL4 lights, and the present humidity in expression warehouse is lower than lower limit; Can indicate with label during use, its meaning is come into plain view.

Key circuit is made up of 4 buttons and peripheral cell thereof.When not having button to press, single-chip microcomputer is a low level for corresponding mouthful, and pressing as key is that corresponding mouth becomes high level.Wherein: button AN4 is the reset key of device.Thereby button AN1-AN3 is used for setting definite temperature humidity range of upper and lower bound of humiture.At first button AN1 when this button is upspring, triggers and interrupts, and device enters the parameter setting pattern.AN2 selects to enter the change temperature model, and AN3 selects to enter change humidity pattern.Short then AN1 determines.In change temperature (wetting) degree pattern, AN2 selects to set temperature (wetting) degree lower limit, and AN3 selects to set temperature (wetting) the degree upper limit, and AN1 is for determining.In setting temperature (wetting) degree bound pattern, AN2 increases temperature (wetting) degree of setting, and AN3 reduces temperature (wetting) degree of setting.Pressing AN1 determines.After parameter setting finished, device returned to the humiture display mode automatically.

Power circuit comprises transformer T, rectifier bridge VD2-VD5, mu balanced circuit 7805 and filter capacitor; Only need the 5v power voltage supply, power supply is independent, makes device directly get final product operate as normal with power for illumination.The crystal oscillator reset circuit has crystal oscillator, button and peripheral cell.This part is the necessary condition of single-chip microcomputer work, is prior art circuits.

The concrete connected mode of foregoing circuit:

1.IC1 chip is the AT89S51 single-chip microcomputer.The VCC mouth connects the 5V power supply.GND mouth ground connection.

2. crystal oscillating circuit: crystal oscillator GY1 meets the XTAL2 of IC1, the XTAL1 bipod.Crystal oscillator GY1 is by capacitor C 7, C8 ground connection simultaneously.

3. button: capacitor C 3 one terminations+5 power supplys, an end is by R11 ground connection.Button AN1 is in parallel with capacitor C 3.So AN1 one termination+5 power supplys, one terminates to the P3.2 mouth of IC1.Capacitor C 4 one terminations+5 power supplys, an end is by R12 ground connection.Button AN2 is in parallel with capacitor C 4.So AN2 one termination+5 power supplys, one terminates to the P3.0 mouth of IC1.Capacitor C 5 one terminations+5 power supplys, an end is by R13 ground connection.Button AN3 is in parallel with capacitor C 5.So AN3 one termination+5 power supplys, one terminates to the P3.1 mouth of IC1.Capacitor C 6 one terminations+5 power supplys, an end is by R14 ground connection.Button AN4 is in parallel with capacitor C 6.So AN4 one termination+5 power supplys, one terminates to the RST mouth of IC1.

4.LED pilot lamp part: each pilot lamp positive pole connects+the 5V power supply, and negative pole connects current-limiting resistance, and the other end of current-limiting resistance R1-R6 connects the P1.5-P1.0 mouth of IC1 successively.

5. buzzer drive circuit: hummer FMQ connects+5V and V2 inter-collector, the V2 grounded emitter.Base stage meets P1.6 by resistance R 9; Junction capacity C2 between V2 emitter and the base stage.

6. Smoke Detection part: QM-N5 supply pin and A pin directly connect+the 5V power supply.The QM-N5 lower margin is by potentiometer RP3 ground connection.The QM-N5B pin links to each other by potentiometer RP2 and diode VD1 are anodal.The VD1 minus earth.The collector extension line of transistor V1 connects the P3.3 mouth of IC1.

7.IC2 this chip is the STH11 Temperature Humidity Sensor.IC21 pin ground connection, 4 pin connect+the 5V power supply.The IC23 pin links to each other with IC1 P0.1 mouth.The IC22 pin links to each other with IC1 P0.0 mouth.The IC22 pin also should connect through pull-up resistor R10+the 5V power supply.

8. liquid-crystal display section: Liquid Crystal Module 1 pin ground connection.2 pin connect+the 5v power supply.3 pin connect the middle pin of potentiometer RP1.Liquid Crystal Module 4 pin connect the P3.7 mouth of IC1.Liquid Crystal Module 5 pin connect the P3.6 mouth of IC1.Liquid Crystal Module 6 pin connect the P3.5 mouth of IC1.The P2.0-P2.7 mouth that meets IC1 of Liquid Crystal Module 7-14 pin correspondence.

9. power module: pin IN1 and IN2 connect the primary side of transformer T1, directly receive on the 220V AC power.The secondary of transformer is surveyed 1 pin of receiving IC3 7805 by rectifier bridge.The direct ground connection of 2 pin of IC3 7805.3 pin of IC3 7805 and be the direct supply output of+5V.The VCC of above circuit or 5V or+5V voltage all is connected on 3 pin of IC3 7805.

The above as shown in Figure 2.

Principle of work:

The 220V alternating current is 9V by the transformer step-down, is direct supply by the rectifier bridge rectification then, through capacitor filtering, and output 5V burning voltage.

The first step: after single-chip microcomputer started, output P1.0 was a low level, P1.1-P1.5 be high level to light VL6, extinguish other lamp.And zero clearing sign.Send out clock signal from the P0.1 mouth and give the STH11 Temperature Humidity Sensor, accept the STH11 data from P0.0.Calculate humiture.And on LCD screen, show.When the scope of the overshoot of humiture, single-chip microcomputer just drives the P1.6 mouth and makes buzzer warning.Making the single-chip microcomputer access port of VL X pilot lamp correspondence simultaneously is low level, lights VL X; And making P1.1 is high level, extinguishes lamp VL6.

Second step: provide negative edge after button AN1 presses and unclamps, trigger singlechip interruption INT0 (P3.2), single-chip microcomputer (IC1) enters parameter pattern is set then.Single-chip microcomputer is accepted the level of button, and carries out the corresponding setting operation.After setting completed, withdraw from the parameter setting pattern automatically.

The 3rd step: when detecting smog, trigger interrupt INT 1 (P3.3), Micro Controller Unit (MCU) driving P1.6 mouth makes buzzer warning.Making P1.1 simultaneously is low level, lights VL5; P1.0 is a high level, extinguishes lamp VL6.When smog left, warning stopped, and lighted VL6, extinguished lamp VL5.

When interrupting not coming, single-chip microcomputer is just carried out the above-mentioned first step always.Just carried out for second step or the 3rd step when detecting when interrupting.

Claims

1. warehouse temperature humidity detecting device is characterized in that its circuit is made of main control chip AT89S51 single-chip microcomputer and Smoke Detection circuit, humiture testing circuit, key circuit, LED light circuit, liquid crystal display circuit, warning circuit and power circuit and crystal oscillator reset circuit; The Smoke Detection circuit is connected on the single-chip microcomputer by single-chip microcomputer INT1 mouth, key circuit is received single-chip microcomputer P3.0-P3.2 mouth, the humiture testing circuit is connected to single-chip microcomputer P0.0, the P0.1 mouth, the LED light circuit is connected on the P1.0-P1.5 mouth of single-chip microcomputer, the liquid crystal display circuit data line connects the P2.0-P2.7 mouth of single-chip microcomputer, the liquid crystal display circuit control line is received the P3.5-P3.7 of single-chip microcomputer, warning circuit is connected to the P1.6 mouth of single-chip microcomputer, reset key in the peripheral circuit is connected on the RST mouth of single-chip microcomputer, crystal oscillating circuit is connected on the XTAL1 and the XTAL2 of single-chip microcomputer, power circuit single-chip microcomputer VCC mouth connects+5V voltage, GND mouth ground connection.