CN103869793A

CN103869793A - Granary monitoring and early warning method

Info

Publication number: CN103869793A
Application number: CN201410123414.3A
Authority: CN
Inventors: 李松年
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-03-31
Filing date: 2014-03-31
Publication date: 2014-06-18

Abstract

The invention relates to a granary monitoring and early warning method. The granary monitoring and early warning method comprises the steps that alarming is achieved by a computer when the temperature and humidity inside each granary are out of upper limits or lower limits by measuring the temperature and humidity of the interior of the granary; a bus network is established by all granaries through RS485, the real-time values and average values of the temperature and humidity of each granary, the station number of each sensor, and the arrangement conditions of sensors in each granary are monitored and displayed in a centralized mode through a computer workstation in a main control room; the short circuit information and open circuit information of each sensor and the real-time alarm information are displayed, and storage, inquiry and printing of historical data are achieved.

Description

A kind of grain depot monitoring and early warning method

Technical field

The invention belongs to electrical and electronic technology, computer technology and automatic field, be specifically related to a kind of grain depot monitoring and early warning method.

Background technology

The necessity that the grain mankind depend on for existence, has a large amount of new grain results also to have part grain in storage for years to overstock every year, if store improper a large amount of foodstuff waste that causes, can cause so huge economic loss, and grain security is most important.The safety of grain in storing process is mainly manifested in the temperature of grain and the variation of moisture, once grain makes moist, its metabolism is accelerated and generation respiration heat, local cereal temperature raises, make grain occur to go rotten rotten, as long as monitor the variation of the temperature and humidity of grain, just can grasp the situation of grain.Therefore, the safe storage of grain is the significant problem of puzzlement food administration unit always, improves grain storage condition, improves grain storage technical merit, promotes that grain storage scientific-technical progress is imperative.The measure of in the past taking is, by artificial way, grain is carried out to airing, ventilates, and spraying agent prevents from, because storing the improper insect pest causing, having consumed a large amount of manpower and financial resources, but poor effect, the phenomenons such as moldy metamorphism still exist.Along with the development of electronic technology and computer technology, generally adopt at present electronics and computing machine to grain information monitoring and management, but still there are a lot of unsatisfactory problems, such as interference free performance is poor, loss of transmitted data, host computer interface be vivid etc., propose a kind of based on fieldbus monitoring the state of foodstuff system for these situations, can reduce grain loss, increase farmers' income.

Cereal temperature monitoring is one of ten large gordian techniquies of China's foodstuff preservation, and the grain situation of change in its capable of dynamic monitoring warehouse, for foodstuff preservation provides safely important leverage.Along with the fast development of national economy, the increase day by day of grain reserves has also proposed more and more higher requirement to cereal temperature detection technique in foodstuff preservation.

The Data Detection such as the interior cereal temperature of current China Grain Trade grain depot and humidity, although all brought into use computer technology, but due to thermometric, humidity sensor is to be all transferred to backstage by wired mode, in a warehouse in real work, all to arrange a hundreds of point for measuring temperature, its line becomes cobweb by warehouse, after passing in and out warehouse, each personnel all to spend a large amount of manpower and materials again to put temperature probe etc., so pass in and out the dismounting behind warehouse and reinstall, the stifling corrosion that waits toxic gas in warehouse, and the destruction of the external force such as thunderbolt, capital causes the damage of large number quipments, and then cause serious waste, also improved the cost of monitoring the state of foodstuff simultaneously.

China's grain condition monitoring system has adopted micro computer monitoring mostly at present, carries out the measuring method of signal transmission by wire cable network, has realized fast and automatically and having detected with digitizing, for safe grain storage provides effective technical support.So far domestic existing tens of enterprises produce grain information monitoring system product, numerous in variety, system architecture is different, but its basic function is only 1-2 in grain condition monitoring parameter, modal as, the temperature of silo or humidity, i.e. several of the inside and outside temperature-humidity monitoring of silo, grain monitoring internal temperature and analysis, Ventilation Control etc.Though this monitor mode substantially reaches requirement in function, in the time of wiring, can produce following problem: Grain Depot is great, causes expense high; Once equipment and wiring system complete construction, be just difficult to change, the very flexible of system, easily causes its circuit and gathers the vacant of facility, reduces the utilization factor of system; System is easily caused damage by insect, grain fumigating, the factor such as artificial, causes quadratic cost to drop into.Existing grain feelings wired monitoring mode can not meet the demands.

Therefore, how to solve the problems that exist in existing monitoring the state of foodstuff, real those skilled in the art's technical task urgently to be resolved hurrily that become.

Summary of the invention

Overcome the weak point of existing wired monitoring the state of foodstuff, the object of this invention is to provide a kind of grain depot monitoring and early warning method, can realize multi-parameter monitoring, the moisture of temperature that can Real-Time Monitoring silo inside, humidity, grain, go mouldy and the grain feelings information such as insect pest; And be connected with Internet network by GPRS network.

A kind of grain depot monitoring and early warning method, described method step is as follows:

(1) by the measurement to the temperature in silo, humidity, by the height overload alarm of humiture in computer realization storehouse;

(2) each silo is set up bus network by RS485, in master-control room, concentrates monitoring to show work item, sensor deployment scenarios in storehouse of humiture instantaneous value, mean value and each sensor of each silo by computer workstation;

(3) short circuit of every sensor, the information that opens circuit and Realtime Alerts information, and carry out history data store and inquiry, printing.

Workstation in RTU and the master-control room of each silo adopts RS485 network communication pattern, and humiture value and sensor status information that workstation gathers RTU show in real time; And the time interval that can set according to user do the timing storage of historical data; Historical data and history curve inquiry and printing.

Meet user to the demand for control basis of grain depot on, workstation is according to zones of different temperature in storehouse, humidity value start and stop blower fan and drier unit, guarantee the relatively stable of Temperature-humidity value, in control procedure, workstation is further realized Temperature-humidity height overload alarm, this method also possesses manual control function, switching disengaging workstation by hardware circuit controls automatically, realize and control manually blower fan and dryer, master-control room is set up into LAN (Local Area Network) with management office, except operator grasps the monitoring situation of grain depot, managerial personnel also can browse the real-time detected value of humiture of each warehouse in office by LAN (Local Area Network), historical data and history curve.

beneficial effect

Can carry out effective monitoring to the grain in grain depot, can give warning in advance to dangerous situation; Cable for measuring temperature is two heart yearn bus-type cables; The fully digitalization of ambient temperature and humidity sensor, can be connected to arbitrfary point in bus; Resistance to chemical attack: route bus is simple, good seal performance, is specially adapted to the control of the temperature and humidity measurement such as grain, tobacco; Construction is simple, saves material, shortens construction period, reduces construction cost.Save data acquisition A/D conversion cost: granary temperature survey sensor quantity is more, due to sensor digitizing, without carrying out A/D conversion, except greatly reducing wiring cable, also can greatly reduce data acquisition A/D conversion cost again.

RTU measuring point capacity is large, and a RTU can articulate tens of cable for measuring temperature; Sensor bus cable and more than branch cable overall length Ke Da 1.5km; Sensor interchangeability is strong, and every sensor has unique number (can be specified by user), and the sensor of identical numbering can arbitrarily exchange, and does not need to change any configuration of software and hardware.System is easy to expand: computer control chamber, without any hardware configuration of change, only needs to increase sensor and corresponding connection bus cable.System is convenient to safeguard, is saved maintenance cost.

Accompanying drawing explanation

A kind of grain depot monitoring early-warning system of Fig. 1 schematic diagram.

Wherein, the 1st, server; The 2nd, blower fan; The 3rd, dehumidifier; 4 is seven 108 meters trunk two heart yearns; The 5th, project team; The 6th, network; The 7th, number bus remote collection unit; The 8th, printing device; The 9th, sensor; The 10th, computing machine; The 11st, controller.

Every backbone connects 20 two core cable for measuring temperature, and every cable for measuring temperature is grown 6 meters, every 0.5 meter of point for measuring temperature.

Embodiment

Finally it should be noted that: obviously, above-described embodiment is only for example of the present invention is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.And the apparent variation of being amplified out thus or variation are still among protection scope of the present invention.

Claims

1. a grain depot monitoring and early warning method, is characterized in that, described method step is as follows:

2. method according to claim 1, is characterized in that: the workstation in RTU and the master-control room of each silo adopts RS485 network communication pattern, and humiture value and sensor status information that workstation gathers RTU show in real time; And the time interval that can set according to user do the timing storage of historical data; Historical data and history curve inquiry and printing.

3. method according to claim 1, it is characterized in that: meet user to the demand for control basis of grain depot on, workstation is according to zones of different temperature in storehouse, humidity value start and stop blower fan and drier unit, guarantee the relatively stable of Temperature-humidity value, in control procedure, workstation is further realized Temperature-humidity height overload alarm, this method also possesses manual control function, switching disengaging workstation by hardware circuit controls automatically, realize and control manually blower fan and dryer, master-control room is set up into LAN (Local Area Network) with management office, except operator grasps the monitoring situation of grain depot, managerial personnel also can browse the real-time detected value of humiture of each warehouse in office by LAN (Local Area Network), historical data and history curve.