CN101477361A - Ozone fresh-keeping system based on wireless sensor network - Google Patents
Ozone fresh-keeping system based on wireless sensor network Download PDFInfo
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- CN101477361A CN101477361A CNA2008101814800A CN200810181480A CN101477361A CN 101477361 A CN101477361 A CN 101477361A CN A2008101814800 A CNA2008101814800 A CN A2008101814800A CN 200810181480 A CN200810181480 A CN 200810181480A CN 101477361 A CN101477361 A CN 101477361A
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- wireless sensor
- ozone
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/85—Food storage or conservation, e.g. cooling or drying
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
The invention relates to an ozone preserving system based on a wireless sensor network, belongs to the field of microelectronic automatic control, and in particular relates to a system for realizing preservation and storage of food such as fruit and vegetables by automatically controlling the ozone concentration based on the wireless sensor network. The invention relates to technology for automatically controlling the ozone concentration based on a ZigBee wireless sensor network. The control system mainly comprises a sensor, the wireless sensor network, environment conditioning equipment such as an ozone generator, and a computer, wherein the ozone concentration and information such as the temperature and the humidity of the environment are transmitted to the computer through wireless sensor nodes and wireless coordinated nodes; and control information determined by the computer is transmitted to corresponding wireless sensor nodes for controlling the environment conditioning equipment. The wireless sensor nodes realize energy conservation in a mode of circulatory dormancy. The system can realize automatic control or manual remote operation, protect the health of operators, and make equipment operation be reliable and energy-saving.
Description
Technical field
Ozone fresh-keeping system based on wireless sensor network belongs to the microelectronics automation field, particularly is a kind ofly to control concentration of ozone gas automatically based on wireless sensor network, realizes the system of the fresh-retaining preserving of food such as fruit, vegetables.
Background technology
Air conditioned storage is fresh-keeping to be the preservation technique of food such as at present a kind of important fruit, vegetables.Its method is: in the air conditioned storage fresh-keeping chamber, artificially control the gas componant in the storage environment, realize food fresh keeping.In recent years, the research aspect the ozone preserving fruit and vegetable utilizing is very active both at home and abroad.Result of study shows that ozone can make the storage time of food such as fruit, vegetables effectively prolong.
The principle of ozone fresh-keeping technology is: ozone has strong oxidizing property, and chemical property is active in the storage environment of food such as fruit, vegetables, can sterilization, sterilization, deodorizing etc.Particularly ozone can decompose fruits and vegetables metabolin ethene, thereby can delay aging thereafter, prolongs its freshness date.Ozone easily decomposes, and final product is an oxygen, and noresidue in food is so be safe.But for human body, ozone is irritative gas, and the fresh-keeping chamber intensive amount is higher than normal value far away, thereby must solve operating personnel's labor protection problem.
The network system of the self-organization of wireless sensor network (the Wireless Sensor Network) multi-hop that to be numerous Miniature Sensor nodes form by the wireless communication mode.The ZigBee wireless sensor network makes up based on IEEE 802.15.4 standard.Such wireless sensor network is supported the mesh network technology, can comprise great deal of nodes, and many routes of self-organization are transmitted information between the node, thereby form a reliable network.Based on the ozone fresh-keeping control system of ZigBee wireless sensor network, can realize control automatically or artificial operated from a distance, reduce the working time of operating personnel in fresh-keeping chamber, the protection health.
Summary of the invention
The present invention relates to technology, to realize the fresh-retaining preserving of food based on the automatic control concentration of ozone gas of ZigBee wireless sensor network.This control system mainly is made up of environment adjusting device, computing machines such as sensor, wireless sensor network, ozone generators.Information such as the temperature of concentration of ozone gas value and environment, humidity value through wireless sensor node, wireless coordinator node, are delivered to computing machine; Corresponding wireless sensor node is transmitted back in the control information of computer decision-making, and conditioning equipment controls environment.Wireless sensor node has been realized energy-conservation under the circulation park mode.
The present invention solves operator ' s health protection problem in the prior art, improves the reliability of concentration of ozone gas automaton work, improves the energy-efficient performance of equipment, the installation and maintenance of simplified apparatus.
Description of drawings
Fig. 1: fresh-keeping warehouse control system synoptic diagram
Fig. 2: wireless sensor network synoptic diagram
Fig. 3: wireless sensor node flow chart
Embodiment
Test findings shows that the ozone fresh-keeping room environmental requires as follows: concentration of ozone gas scope 5-12ppm, temperature range 5-10 ℃, humidity range 80-98%RH, wind speed maximal value 0.6m/s.The low temperature and high relative humidity condition can obviously improve sterilization effect.
The key of ozone fresh-keeping technology is to guarantee that concentration of ozone gas is in specialized range.The method of regulating and controlling concentration of ozone gas is: generate ozone by ozone generator, regularly add in the fresh-keeping chamber.Simultaneously, detect the concentration of ozone gas of each fresh-keeping chamber, when being lower than the setting minimum, increase the growing amount of ozone.When being higher than the setting mxm., stop the generation of ozone, adopt decomposer to eliminate the ozone excessive residual where necessary, and combustion gas.The strategy of the energy consumption of optimization system is in the identical time period, increases the interpolation number of times of ozone gas, reduces each addition to necessary amount.
The fresh-keeping warehouse control system as shown in Figure 1.Sensor type comprises concentration of ozone gas, temperature, humidity sensor etc.Environment adjustment system comprises ozone generator, ventilation equipment, temperature control equipment, Humidity regulating equipment etc.The corresponding environment adjusting device of measured value control according to various sensors.
Corona discharge method is adopted in the generation of ozone, promptly makes oxygen O under normal pressure
2Under the effect of alternation high-voltage electric field, produce corona discharge and generate ozone O
3The corona discharge type ozone generator is that relative energy consumption is lower, unit ozone output maximum, most widely used ozone generating-device.Ozone generator is controlled by the gauge tap amount of wireless sensor node.
Ozone sensor adopts the semi-conductor type gas sensor, has characteristic with low cost, highly sensitive, that response speed is fast.The impedance of ozone sensor is along with concentration of ozone gas changes.The magnitude of voltage at sensitive element two ends passes through the concentration of ozone gas value that hardware and software compensation obtain demarcating from the A/D port processing of the single-chip microcomputer of wireless sensor node.The temperature of concentration of ozone gas value and environment, humidity value etc. through wireless sensor node, wireless coordinator node, finally are delivered to computing machine.Corresponding wireless sensor node is transmitted back in the control information that computer decision-making obtains, controlled switching value.
Wireless sensor network as shown in Figure 2.Wireless coordinator node is responsible for initiating network, and by serial ports data transfer is arrived computing machine.Wireless sensor node is connected with various sensors, and the output of gauge tap amount is provided simultaneously.Data between wireless sensor node and wireless coordinator node by the wireless communication mode transmission, cable wiring manufacture specially, the installation and maintenance of equipment are very easy.Owing to adopt the ZigBee standard, many routes of self-organization are transmitted information between the node, rather than depend on some specific nodes, and reliability greatly improves.
The energy-conservation employing circulation park mode of wireless sensor node is realized.This node need have the output control action, by choosing suitable dormancy, working time, can take into account controlled and energy saving.The wireless sensor node flow chart of park mode as shown in Figure 3.
Claims (6)
1. be a kind ofly to control concentration of ozone gas automatically based on the ozone fresh-keeping system of wireless sensor network, realize the system of the fresh-retaining preserving of food such as fruit, vegetables based on wireless sensor network.It is characterized in that: the concentration of ozone gas data of gathering the food storage environment based on the wireless sensor network of ZigBee, and pass through computer decision-making, control ozone generator, ventilating system, humidity control system, humidity control system etc. guarantee food storage environment optimization.
2. the ozone fresh-keeping system based on wireless sensor network according to claim 1, it is characterized in that: the single-chip microcomputer collection concentration of ozone gas value of wireless sensor node and temperature, humidity value are delivered to wireless coordinator node and computing machine by wireless communication mode.
3. the ozone fresh-keeping system based on wireless sensor network according to claim 1, it is characterized in that: the computer decision-making result returns corresponding wireless sensor node by the wireless communication mode transmission, control ozone generator, ventilating system, humidity control system, humidity control system etc.
4. wireless sensor node according to claim 2, it is characterized in that: the A/D change-over circuit of wireless sensor node single-chip microcomputer is gathered the magnitude of voltage at the sensitive element two ends of ozone sensor, the concentration of ozone gas value that process hardware and software compensation obtain demarcating.
5. wireless sensor node according to claim 3 is characterized in that: the output control switch amount.Under the circulation park mode,, take into account controlled and energy saving by choosing suitable dormancy, working time.
6. ozone sensor according to claim 4 is characterized in that: have low accurate reference circuit of drift and overheating protection circuit.Overheating protection circuit detects heating power supply voltage by the voltage comparator of single-chip microcomputer, breaking circuit when voltage surpasses 2.4V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101814800A CN101477361A (en) | 2008-11-14 | 2008-11-14 | Ozone fresh-keeping system based on wireless sensor network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101814800A CN101477361A (en) | 2008-11-14 | 2008-11-14 | Ozone fresh-keeping system based on wireless sensor network |
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| CN101477361A true CN101477361A (en) | 2009-07-08 |
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| CNA2008101814800A Pending CN101477361A (en) | 2008-11-14 | 2008-11-14 | Ozone fresh-keeping system based on wireless sensor network |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882365A (en) * | 2010-04-20 | 2010-11-10 | 上海大学 | Intelligent broadband wireless (SIMO) environmental detection and control system |
| CN102880148A (en) * | 2012-09-27 | 2013-01-16 | 华中农业大学 | Automatic control system and control method for mandarin orange storage conditions |
| CN104571163A (en) * | 2014-11-13 | 2015-04-29 | 无锡悟莘科技有限公司 | Automatic oxygen increasing monitoring method based on wireless sensor network |
| CN106070556A (en) * | 2016-06-28 | 2016-11-09 | 广西杨氏鲜果有限公司 | A kind of fruits through ozone fresh-keeping system |
-
2008
- 2008-11-14 CN CNA2008101814800A patent/CN101477361A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882365A (en) * | 2010-04-20 | 2010-11-10 | 上海大学 | Intelligent broadband wireless (SIMO) environmental detection and control system |
| CN101882365B (en) * | 2010-04-20 | 2012-06-13 | 上海大学 | Intelligent broadband wireless (SIMO) environmental detection and control system |
| CN102880148A (en) * | 2012-09-27 | 2013-01-16 | 华中农业大学 | Automatic control system and control method for mandarin orange storage conditions |
| CN102880148B (en) * | 2012-09-27 | 2014-08-20 | 华中农业大学 | Automatic control system and control method for mandarin orange storage conditions |
| CN104571163A (en) * | 2014-11-13 | 2015-04-29 | 无锡悟莘科技有限公司 | Automatic oxygen increasing monitoring method based on wireless sensor network |
| CN106070556A (en) * | 2016-06-28 | 2016-11-09 | 广西杨氏鲜果有限公司 | A kind of fruits through ozone fresh-keeping system |
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Open date: 20090708 |