CN102402848B

CN102402848B - Multipoint temperature and humidity remote measurement alarm device of straw stack

Info

Publication number: CN102402848B
Application number: CN201110350144.6A
Authority: CN
Inventors: 庄会永; 蒋大龙; 张雁茹; 邹俊; 莫光轶; 傅新
Original assignee: NATIONAL BIO ENERGY GROUP CO LTD; Zhejiang University ZJU
Current assignee: NATIONAL BIO ENERGY GROUP CO LTD; Zhejiang University ZJU
Priority date: 2011-11-08
Filing date: 2011-11-08
Publication date: 2014-05-14
Anticipated expiration: 2031-11-08
Also published as: CN102402848A

Abstract

The invention discloses a multipoint temperature and humidity remote measurement alarm device of a straw stack, which comprises a terminal singlechip module, a wireless sending module, a wireless receiving module, a computer and a plurality of measurement units, wherein the plurality of measurement units are respectively connected with the terminal singlechip module, the terminal singlechip module is communicated with the computer through the wireless receiving module and the wireless sending module; and each measurement unit is formed by connecting a temperature and humidity sensor with the singlechip module. The multipoint temperature and humidity remote measurement alarm device has the advantages of small volume, simpleness in building, low cost, long transmission distance, more scientific measurement and the like.

Description

Straw stacks remote measurement alarm device for measuring multi-spot humiture

Technical field

This patent relates to the real-time measure and control device of a kind of warehoused cargo, relates in particular to a kind of multiple spot humiture real time remote and measures warning device.

Background technology

A kind of design philosophy and implementation procedure of multiple spot temperature/humidity measuring system introduced in " modern electronic technology " magazine 2005 the 22nd phase article " the multipoint wireless temperature/humidity measuring system based on nRF24E1 ".The system architecture of this scheme is simple, and reliability is high, and data rate is fast, and function is easily expanded, and is applicable to the wireless monitor of multiple application humiture.But communicate by letter by RS232 communication protocol between sensor and single-chip microcomputer, transmission range only has 15 meters, can not meet stalk large area and stack the demand in place.The sensor transducer of selling on the market at present adopts RS485 communications protocol, and communication distance reaches 1000 meters, but each measurement point need be joined one, and transmitter volume is large, expensive, and inconvenience is installed, and requires high to stacking site environment.

Chinese patent CN101158604 discloses a kind of humiture measurement mechanism, include temperature and humidity measurement part (IIC sensor), data acquisition and processing (DAP) part, humiture display section, this measurement mechanism has fast response time, measuring accuracy is high, applicable to features such as high temperature low humidity measurement environment.Can be applicable to grain, cotton, clothing factory, silk mill, chemical fibre production etc. and need to measure the various occasions of controlling humiture.But current IIC agreement sensor on the market all does not support to address function, and therefore, this scheme does not solve multiple spot Real-Time Monitoring problem; Data transmission between its each unit is directly completed by Transistor-Transistor Logic level, therefore cannot carry out compared with Long-range Data Transmission.

Summary of the invention

The object of the invention is to meet the requirement of multiple spot temperature and humidity measurement, data long-distance transmissions, for straw power generation station provides a kind of straw stacks remote measurement alarm device for measuring multi-spot humiture, cost of the present invention is low, low in energy consumption.

The object of the invention is to reach by following scheme: a kind of straw stacks remote measurement alarm device for measuring multi-spot humiture, it comprises terminal one-chip computer module, wireless sending module, wireless receiving module, computing machine and several measuring units; Wherein, several measuring units are connected with terminal one-chip computer module respectively, and terminal one-chip computer module is by wireless sending module and wireless receiving module and compunication; Each measuring unit is connected to form by Temperature Humidity Sensor and one-chip computer module.

Further, the number of described measuring unit is 8, concrete setting position is as follows: straw stacks center arranges the first measuring unit, stacking outer rim arranges the 3rd measuring unit, the midpoint of the first measuring unit and the 3rd measuring unit arranges the second measuring unit, the midpoint of the first measuring unit and the second measuring unit arranges the 4th measuring unit, the midpoint of the second measuring unit and the 3rd measuring unit arranges the 5th measuring unit, the midpoint of the first measuring unit and the 4th measuring unit arranges the 6th measuring unit, the midpoint of the second measuring unit and the 4th measuring unit arranges the 7th measuring unit, the midpoint of the first measuring unit and the 6th measuring unit arranges the 8th measuring unit.

The invention has the beneficial effects as follows: 1, volume is little.Measuring unit and terminal one-chip computer module, be 10 × 4mm control circuit, is convenient to install.2, build simple, with low cost.Of the present invention simple for structure, element used is basic components and parts, and each several part line is connected and can be built at completion system scene.3, long transmission distance.Measuring unit adopts RS485 signal and communication, and transmission range can reach 1200m, and wireless module transmission range can reach 800m, can meet the needs of the warehoused cargo measuring system of large area stacking.

Accompanying drawing explanation

Fig. 1 is general structure block diagram of the present invention;

Fig. 2 is the temperature simulation result figure of cube straw stacks;

Fig. 3 is the temperature emulation distribution plan from the inside to the outside of cube straw stacks;

Fig. 4 is the measurement point distribution figure arranging in straw stacks, in figure,

Figure 2011103501446100002DEST_PATH_IMAGE001

for measurement point;

Fig. 5 is single measuring unit Single Chip Microcomputer (SCM) program process flow diagram;

Fig. 6 is terminal Single Chip Microcomputer (SCM) program process flow diagram;

Fig. 7 is one-chip computer module and the terminal one-chip computer module circuit diagram in measuring unit.

Embodiment

As shown in Figure 1, straw stacks remote measurement alarm device for measuring multi-spot humiture of the present invention comprises terminal one-chip computer module, wireless sending module, wireless receiving module, computing machine and several measuring units.Wherein, several measuring units are connected with terminal one-chip computer module respectively, and terminal one-chip computer module is by wireless sending module and wireless receiving module and compunication.

Each measuring unit is connected to form by Temperature Humidity Sensor and one-chip computer module.Temperature Humidity Sensor and single-chip microcomputer are by the communication of IIC agreement, and the one-chip computer module of each measuring unit sends one-shot measurement request signal at set intervals, obtain this humiture value storage by coupled Temperature Humidity Sensor.The one-chip computer module of each measuring unit is converted to RS485 signal by MAX485 chip by communication, together links on terminal one-chip computer module, to realize telecommunication.The each own unique address value of each measurement point one-chip computer module, terminal one-chip computer module sends request signal one time in turn to the one-chip computer module of each measuring unit at set intervals, according to the humiture information of the address sort storage each point of the one-chip computer module of each measuring unit.The measurement data that the one-chip computer module of each measuring unit transmits is obtained in the control of terminal one-chip computer module, then close RS485 channel, open wireless telecommunications passage, and the address information of each point and corresponding humiture numerical information are passed to host computer by wireless transmission method.After host computer is processed, facilitate staff's Real-Time Monitoring by man-machine interface.

Cube stacking is carried out to thermal conduction study emulation, obtain result shown in Fig. 2: Fig. 2 and represent 1/4th of stacking, its lower left corner is the center of stacking, and can regard as is a thermal source.Emulation draws the distribution situation of temperature in cube shaped stacking, as shown in Figure 3: and the rate of temperature change maximum at center, and more outward less, could accurately draw its temperature distribution history therefore more measuring unit need to be set near the position at stacking center; And stacking periphery, temperature variation is less, and curve smoothing, therefore do not need to arrange multiple measurement points.

In sum, design the measurement point distribution mode shown in Fig. 4: stacking center arranges the first measuring unit, stacking outer rim arranges the 3rd measuring unit, the midpoint of the first measuring unit and the 3rd measuring unit arranges the second measuring unit, the midpoint of the first measuring unit and the second measuring unit arranges the 4th measuring unit, the midpoint of the second measuring unit and the 3rd measuring unit arranges the 5th measuring unit, the midpoint of the first measuring unit and the 4th measuring unit arranges the 6th measuring unit, the midpoint of the second measuring unit and the 4th measuring unit arranges the 7th measuring unit, the midpoint of the first measuring unit and the 6th measuring unit arranges the 8th measuring unit.Confirm through experiment, measuring unit arrangement can science be measured the distribution curve of straw stacks internal temperature exactly as described above.

Fig. 5 is the Single Chip Microcomputer (SCM) program process flow diagram in each measuring unit.Single-chip microcomputer waiting timer interrupts, and during to particular moment, unlatching is communicated by letter with Temperature Humidity Sensor, obtains metrical information, waits for afterwards terminal single-chip microcomputer signal interruption, and terminal single-chip microcomputer is sent after signal, and surveyed data are issued to terminal single-chip microcomputer.

Fig. 6 is terminal Single Chip Microcomputer (SCM) program process flow diagram.Single-chip microcomputer waiting timer interrupts, and during to particular moment, sends in turn signal to each measuring unit single-chip microcomputer, then receive the measurement data that each single-chip microcomputer is sent, and storage successively, open afterwards wireless sending module, data are sent successively by wireless sending module.

Circuit diagram shown in Fig. 7, both can be used as terminal one-chip computer module circuit, also can be used as one-chip computer module circuit in single measuring unit.During as the former, connection terminal P3 port is connected with wireless sending module, and connection terminal P2 port is unsettled need not; During as the latter, connection terminal P2 end is connected with Temperature Humidity Sensor, and connection terminal P3 port is unsettled need not.Connection terminal P1 port is RS485 communication and power supply port, and the single-chip microcomputer of each measuring unit is connected used with terminal single-chip microcomputer.

As shown in Figure 7, the input end (Vin) of voltage stabilizing chip VR1 connects 2 pin of connection terminal P1, and one end of capacitor C 4, capacitor C 6, output terminal (Vout) meets internal electric source Vcc, and one end of capacitor C 4, capacitor C 5, the other end of capacitor C 4, capacitor C 5, capacitor C 6, capacitor C 7 is all connected to the ground, and plays filter action.485 signal conversion chip U2,1 pin connects single-chip microcomputer PD0 pin, 4 pin connect single-chip microcomputer PD1 pin,

control port

2,3 pin connect respectively PB7, the PB6 pin of single-chip microcomputer, 485 signal output pin 6,7 pin, are connected to 3,4 pin of connection terminal P1, indirect balance resistance R1,8 pin meet internal electric source Vcc, realize the conversion of RS232 signal to RS485 signal.Resistance R 2, resistance R 3, switch S 1, capacitor C 8 form monolithic processor resetting module, resistance R 2 one termination power Vcc, and the other end connects the RESET pin of single-chip microcomputer, control single chip computer reset time, resistance R 3 one termination switch S 1, other end ground connection, realizes current-limiting function, switch S 1 one end connects single-chip microcomputer RESET pin, other end connecting resistance R3, for resetting, capacitor C 8 one end connect single-chip microcomputer RESET pin, other end ground connection, realizes the reset of single-chip microcomputer by discharging and recharging of electric capacity.Crystal oscillator Y1, capacitor C 1, capacitor C 2 form single-chip microcomputer crystal oscillation module, and capacitor C 1 one end connects the XTAL2 pin of single-chip microcomputer, other end ground connection, and capacitor C 2 one end connect the XTAL1 pin of single-chip microcomputer, other end ground connection, capacitor C 1, capacitor C 2 help crystal oscillator Y1 starting of oscillation.Crystal oscillator Y1 is connected between the XTAL1 pin and XTAL2 pin of single-chip microcomputer, for single-chip microcomputer provides oscillating clock signal.Connection terminal P2 is sensor PORT COM, and 1 pin connects power Vcc, 4 pin ground connection, and 2,3 pin connect respectively the TWI port of single-chip microcomputer: PC0, PC1, and be connected with pull-up resistor R4, pull-up resistor R5 respectively, resistance R 4, resistance R 5 other ends are connected with power Vcc.Connection terminal P3 is wireless module connectivity port, 1 pin ground connection, and 2 pin connect power Vcc, and control port 3 pin connect the PB5 pin of single-chip microcomputer, and

communication port

4,5 pin connect respectively PD1, the PD0 pin of single-chip microcomputer.The GND pin ground connection of single-chip microcomputer.VCC, the AVCC pin of single-chip microcomputer meet internal electric source Vcc.The AREF pin of single-chip microcomputer connects capacitor C 3, and capacitor C 3 other end ground connection, realize filtering.

Claims

1. a straw stacks remote measurement alarm device for measuring multi-spot humiture, it comprises terminal one-chip computer module, wireless sending module, wireless receiving module, computing machine and several measuring units, and each measuring unit is connected to form by Temperature Humidity Sensor and one-chip computer module, it is characterized in that, described several measuring units are connected with terminal one-chip computer module respectively, and terminal one-chip computer module is by wireless sending module and wireless receiving module and compunication, the number of described measuring unit is 8, concrete setting position is as follows: straw stacks center arranges the first measuring unit, stacking outer rim arranges the 3rd measuring unit, the midpoint of the first measuring unit and the 3rd measuring unit arranges the second measuring unit, the midpoint of the first measuring unit and the second measuring unit arranges the 4th measuring unit, the midpoint of the second measuring unit and the 3rd measuring unit arranges the 5th measuring unit, the midpoint of the first measuring unit and the 4th measuring unit arranges the 6th measuring unit, the midpoint of the second measuring unit and the 4th measuring unit arranges the 7th measuring unit, the midpoint of the first measuring unit and the 6th measuring unit arranges the 8th measuring unit.