CN107885171A - A kind of dairy products cold chain transportation intellectual monitoring method for early warning - Google Patents
A kind of dairy products cold chain transportation intellectual monitoring method for early warning Download PDFInfo
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- CN107885171A CN107885171A CN201710878521.0A CN201710878521A CN107885171A CN 107885171 A CN107885171 A CN 107885171A CN 201710878521 A CN201710878521 A CN 201710878521A CN 107885171 A CN107885171 A CN 107885171A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 53
- 235000013365 dairy product Nutrition 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 25
- 235000013336 milk Nutrition 0.000 claims abstract description 73
- 239000008267 milk Substances 0.000 claims abstract description 73
- 210000004080 milk Anatomy 0.000 claims abstract description 73
- 230000008569 process Effects 0.000 claims abstract description 13
- 238000005286 illumination Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 5
- 229910006270 Li—Li Inorganic materials 0.000 claims description 4
- 230000007812 deficiency Effects 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims 1
- 238000001514 detection method Methods 0.000 claims 1
- 229910052744 lithium Inorganic materials 0.000 claims 1
- 210000000481 breast Anatomy 0.000 abstract description 33
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 6
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- 235000013305 food Nutrition 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
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- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 241000124008 Mammalia Species 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
- 238000003066 decision tree Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
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- 235000021393 food security Nutrition 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000011059 hazard and critical control points analysis Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
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- 235000020200 pasteurised milk Nutrition 0.000 description 1
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4189—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the transport system
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- Manufacturing & Machinery (AREA)
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- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
A kind of dairy products cold chain transportation intellectual monitoring method for early warning, include multiple milk container sensing nodes and a milk tank vehicle gateway for being located at appropriate position positioned at milk tank vehicle milk storehouse outside and one in control box for lactogenesis cold chain transportation, whether milk container sensing node adjusts the time interval that Monitoring Data is sent to milk tank vehicle gateway according to Monitoring Data with battery electric quantity extremely, while the data of multiple nodes of reception are sent to server by gateway, implement forecasting and warning for abnormal conditions；A low temperature breast refrigerator car integrated terminal inside refrigerator car is included for low temperature breast cold chain transportation, the terminal directly monitors compartment inner ring border parameter and vehicle position information, and while the Multi-parameter data of monitoring is sent into server, realize the forecasting and warning of abnormal conditions.The present invention realizes the real-time efficient system monitoring and warning in the whole cold chain transportation process of dairy products safety, and is applied in actual carry out of dairy enterprises, and the monitoring and warning of acquirement works well.
Description
Technical field
The present invention relates to food security electronics to trace to the source and embedded and Internet of Things field, and specifically a kind of dairy products are cold
Chain transports intellectual monitoring method for early warning and system.
Background technology
Dairy products are a kind of food with very high nutritive value and market value, and its quality security problem is by national high
Degree concern., it is necessary to which carry out cold chain transportation is lactogenesis and low temperature breast in dairy products supply chain.But because dairy products are supplied
The complexity of chain, lactogenesis and low temperature breast easily occur corruption or quality comparison in cold chain transportation, are buried safely to quality of dairy products
Hidden danger, it is also possible to dairy enterprises bring economic loss.Raw milk is also known as Fresh Milk, also referred to as fresh milk, be from
What healthy ox body Normal breast was forced down, merely through cooling, it may pass through filtering, but without sterilization, heating, net breast, it is special
It is not the natural mammal gland secretion without pasteurize.Low temperature breast refers to be processed and shape lactogenesis using pasteurization
Into dairy products, in the market by pasteurised milk and sour milk product be referred to as low temperature breast.Raw milk needs entirely in transportation
2 DEG C~6 DEG C cold chain transportations of journey, temperature is very big to raw milk qualitative effects, and temperature control is bad to cause raw milk to become rapidly
Matter.The pasteurization used in low temperature breast production can kill the harmful microorganism in lactogenesis, but it is other also to retain some
Microorganism, thus after low temperature breast leaves production line, the ring at 4 DEG C or so is required in the links such as transport, sale, storage
Refrigerated in border.Cold chain transportation is the core link of Cold Chain Logistics, is made based on refrigerating process, with Refrigeration Technique
For means, to keep low temperature environment to make the breast of transport using cold chain transportation technology as the low temperature logisticses process of core requirement
Product is maintained in suitable environment, ensures Quality of Dairy Products to the full extent, reduces loss.
Dairy products Cold Chain Logistics are a complete, continuous supply chains, and it possesses multiple " nodes " and link.Lactogenesis is cold
Chain transport be lactogenesis warehouse node to the link between dairy enterprises node, low temperature breast cold chain transportation be dairy enterprises node
To the link of business's supernode.Fig. 1 gives dairy products cold chain flow chart.As seen from Figure 1, lactogenesis Cold Chain Logistics are by squeezing
Milk, precooling, storage, cold chain transportation etc. are formed, and low temperature breast cold chain logistics are the cold chain transportations after dispatching from the factory.Breast system
Product cold chain transportation is to provide suitable low temperature as core requirement, and for the purpose of the quality safety for ensureing lactogenesis and low temperature breast, it has
Quality Safety characteristic, position transfer characteristic, high cost behavior and technological synthesis characteristic.
For lactogenesis transport vehicle, country formulated professional standard QC/T23-2014, it is specified that the term of lactogenesis haulage vehicle and
The contents such as definition, requirement, inspection rule, transport and storage.Lactogenesis cold chain transportation car is also known as milk tank vehicle, by QC/T23-2014
Standard understands that milk container is by tank body, heat-insulation layer, heat-insulation layer shell, control box, safety attachment, valve, tank deck workbench and staircase
Deng composition.When the transportation range of lactogenesis is more than 500km, milk tank vehicle can add small-sized refrigerator.The tank body and heat-insulation layer of milk tank vehicle
Shell is made of stainless steel, and heat-insulation layer is typically filled thick polyurethane foam material and is incubated.According to the milk storehouse number of milk tank vehicle
Amount can be divided into single milk storehouse milk tank vehicle and more milk storehouses milk tank vehicle, and tank body is underfilled with milk being caused to rock, and milk, which is rocked, not only can
Causing lactogenesis precipitation, foam to become more can also cause car body unstable, so dairy enterprises typically use more milk storehouses milk tank vehicle.
Country has put into effect GB 29753-2013 standards, it is specified that the term and definition of part cold chain transportation car, classification, will
Ask and test method.The refrigerator car of shipping perishable foods is made up of headstock, chassis, compartment, mechanical refrigeration unit etc. in the standard,
The compartment of low temperature breast refrigerator car should have the good osculum of air-tightness, from water imbibition is low, gas permeability is small, thermal conductivity factor is small,
The good heat-barrier material of corrosion resistance, it is also necessary to possess good weather seal, air-tightness, heat-proof quality and mechanical performance.Breast
The low temperature breast refrigerator car of industry company typically uses A class refrigerator cars, and heat-barrier material uses environmentally friendly foamed plastics.
With the supply expansion of chain end demand, the acceleration of urbanization process cause urban transportation condition congestion aggravation,
It is accidentally or unexpected present in transportation, with reference to lactogenesis and low temperature the breast feature very sensitive to temperature, can make lactogenesis and
The rotten acceleration of low temperature breast.In order to ensure the quality safety of dairy products, based on food safety management technology HACCP to lactogenesis and low
The newborn cold chain transportation link application CCP decision trees of temperature have carried out CCP analysis：
1) lactogenesis and low temperature breast need whole 2 DEG C~6 DEG C cold chain transportations in cold chain transportation process, and temperature is to lactogenesis and low
Warm milk-quality influence is very big, and temperature control is bad to cause lactogenesis and low temperature breast rapid deterioration.Lactogenesis and low temperature milk-quality
Actual conditions are reflected directly in temperature.
2) in the actual cold chain transportation process of lactogenesis, national regulation lactogenesis conveying people should the handing-over of onboard lactogenesis
It is single, lactogenesis temperature etc. when lactogenesis purchase station name, haulage vehicle licence plate, time of shipment, shipment should be stated clearly on lactogenesis delivery receitp
Content.The problems such as vestige manages (such as lactogenesis delivery receitp is imperfect on record) lack of standardization occurs in this paper record mode,
In addition, the generation of improper operation behavior can not be excluded in lactogenesis is specifically purchased, potential safety hazard be present.
3) in the actual cold chain transportation process of low temperature breast, dairy enterprises are all planned for each low temperature breast refrigerator car
Its travel route has been got well, and the reliability temperature threshold in refrigerator car has been provided.But in low temperature breast transportation, it is impossible to
The generation of improper operation behavior is excluded, and the potential safety hazard that low temperature breast refrigeration vehicle interior temperature could not regulate and control in time be present.
But in traditional perishable items transportation, the acquisition of environmental data is only to measure product to reach in compartment
The real-time temperature of temperature and product during destination in refrigerator carriage, then manually enter in computer.Chart recorder goes out
The historical data monitored can be now printed on paper by transverse axis of the time, but for cold chain transportation process, monitoring
Data are recorded on paper, and data volume is larger, can not be checked and be fed back in time.And temperature is monitored and simply opened
When closing the door, loading and unloading goods, the abnormal conditions entirely occurred in transit can not find and be resolved in time.Barcode technology passes through volume
The technologies such as code, printing, light sensing, the data entrained by it are read out using photoelectric scanning device, rapidly and accurately by number
According to being handled in typing computer, there is the advantages of automatic identification, cost are low, deployment is convenient, greatly enhance logistics
Efficiency, but bar code capacity limit, it is impossible to the ambient parameter in Real-time Collection transmission cold chain transportation process.Electronics humiture records
Instrument can measure humiture parameter, and be stored at predetermined intervals in the memory carried, and completing will after monitoring
It, which is connected on computer, is downloaded and analyzes to record data, realizes that the abnormal conditions in transportation are monitored.But
Electronics humiture recorder can not realize real-time remote monitoring, and Surveillance center's data, which obtain, has hysteresis quality.
The content of the invention
The present invention is directed to real-time, low-power consumption and the forecasting and warning demand of dairy products cold chain transportation, with reference to embedded and thing
Networking technology and artificial intelligence technology realize the intelligent monitoring early warning of dairy products cold chain transportation and multidimensional management.
The technical scheme is that：
The present invention provides a kind of dairy products cold chain transportation intellectual monitoring method for early warning, if lactogenesis temperature safety changes in milk container
Threshold value is μ1, the safe change threshold of milk container interlayer humidity is μ2, the safe change threshold of intensity of illumination is μ in control box3；In milk container
After sensing contact power-up initializing, power-consumption control system reads the output interface LBO of battery voltage monitoring module output shape
State：
(1) if LBO outputs are high level, the temperature averages T of each milk storehouse both sides of milk container is gatheredi, humidity average value
Ri, intensity of illumination L in acquisition operations casei, the temperature averages T of each milk storehouse both sides is gathered after 5s againi+1, humidity average value
Ri+1With intensity of illumination L in control boxi+1；
If | Ti-Ti+1|≤μ1、|Ri-Ri+1|≤μ2And | Li-Li+1|≤μ3, then T is madei=Ti+1、Ri=Ri+1、Li=Li+1；If
|Ti-Ti+1|≤μ1、|Ri-Ri+1|≤μ2With | Li-Li+1|≤μ3There is a condition to be unsatisfactory for, then node immediately passes through bluetooth module
Hardware component sends current cell voltage state and monitoring factor data to gateway；
If three conditions meet always, current cell voltage state and monitoring factor data are sent after 5min to net
Close；
(2) if LBO outputs be low level, to avoid because of the false alarm of the reasons such as power supply noise, after progress delay process again
Secondary judgement, battery electric quantity deficiency is represented if being low level if still output, reduces the frequency acquisition to monitoring key element and increasing at once
The time interval for sending Monitoring Data is added to extend service time of battery..
Beneficial effects of the present invention：
The present invention is directed to real-time, low-power consumption and the forecasting and warning demand of dairy products cold chain transportation, with reference to embedded and thing
Networking technology and artificial intelligence technology realize the intelligent monitoring early warning of dairy products cold chain transportation and multidimensional management.
The present invention combines artificial intelligence technology and embedded and technology of Internet of things devises a kind of dairy products cold chain transportation intelligence
Energy monitoring and pre-alarming method and system realize the multi-parameter monitoring and early warning to lactogenesis and low temperature breast cold chain transportation process, reach real-time
Monitoring and early warning, the purpose to take measures in time, and then ensure the Quality Safety of lactogenesis and low temperature breast.
Milk container sensing node of the present invention in lactogenesis cold chain transportation link employed on hardware super low-power consumption bluetooth and
Super low-power consumption microcontroller STM8L100F3P6, milk container sensing node is scanned to reduce milk using milk tank vehicle gateway on software
Tank sensing node energy consumption, the real-time monitoring of super low energy consumption is realized, extend the service life of milk container sensing node；In addition, milk
Tank sensing node with the addition of optical sensor and battery voltage monitoring module, and wherein optical sensor can realize unpacking operation etc.
The time of business operation behavior and duration are monitored, and battery voltage monitoring module can be realized to the pre- of battery electric quantity deficiency
It is alert, to change battery in time, avoid milk container sensing node data-transmission interruptions caused by the electricity shortage of burst.
Present invention employs newest NB-IOT technologies, reduce the use of bandwidth, the waste of flow and the loss of the energy.
The present invention realizes the real-time efficient system monitoring and warning in the whole cold chain transportation process of dairy products safety,
And applied in actual carry out of dairy enterprises, the monitoring and warning of acquirement works well.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Exemplary embodiment of the invention is described in more detail in conjunction with the accompanying drawings, it is of the invention above-mentioned and its
Its purpose, feature and advantage will be apparent, wherein, in exemplary embodiment of the invention, identical reference number
Typically represent same parts.
Fig. 1 shows lactogenesis Cold Chain Logistics schematic diagram.
Fig. 2 shows the hardware overall architecture schematic diagram of the present invention.
Fig. 3 shows that milk container sensing node obtains hardware architecture diagram.
Fig. 4 shows software overall architecture schematic diagram.
Fig. 5 shows physical circuit design drawing.
Fig. 6 shows change-over circuit figure.
Fig. 7 shows the union hardware structure of milk tank vehicle gateway and low temperature breast refrigerator car integrated terminal.
Fig. 8 shows one of early warning framework schematic diagram.
Fig. 9 shows the two of early warning framework schematic diagram.
Embodiment
The preferred embodiment of the present invention is more fully described below with reference to accompanying drawings.Although the present invention is shown in accompanying drawing
Preferred embodiment, however, it is to be appreciated that may be realized in various forms the present invention without the embodiment party that should be illustrated here
Formula is limited.
Because NB-IOT technologies have just been risen, temporarily only have Jianye District there are the NB-IOT network coverages in Nanjing, so this
The software and hardware of invention has carried out one on the low temperature breast refrigerator car by Jianye District of Nanjing Wei Gang dairy industries Co., Ltd
The practical application of the moon.
During practical application, the present invention can realize the humiture prison of diverse location in low temperature breast refrigerated vehicle carriage
Survey, the monitoring that car door switching time and number can be realized by optical sensor, it is possible to achieve vehicle location is determined in real time
Position, all Monitoring Datas can be sent to given server in real time, and when multi-parameter monitoring numerical value is pressed in threshold range in danger
When can realize short message forecasting and warning.
When transmitting all effective Monitoring Datas to given server, the present invention is transmitted using fixed data form.
1st, milk container sensing node
2 sensors are disposed in the present invention on a milk container sensing node, wherein the node being placed on milk storehouse contains 2
Temperature Humidity Sensor, the node being placed in milk tank vehicle control box contain 1 humiture and 1 optical sensor.Milk container senses
Effective Monitoring Data that node collects all the sensors on node according to the data packet format of regulation is transferred to milk tank vehicle net
Close.The data packet format difference of milk container sensing node on milk tank vehicle milk storehouse is as shown in table 1, and the milk container in milk tank vehicle control box passes
Feel shown in node data bag table 2.
Table 1
Packet occupies 16 bytes in table 1, wherein separator using "；”；Packet header is by opening flag symbol and milk storehouse group
Into such as："@A " represent the Monitoring Data that notebook data bag is milk storehouse A；The temperature averages of one milk storehouse of temperature representative Liang Ge positions,
Data format is " 06.32 ", represent this moment temperature as 6.32 DEG C；The humidity that humidity does not represent milk storehouse two positions of interlayer is averaged
Value, data format is " 22.32 ", represent this moment relative humidity as 22.32%；Bag tail form is fixed as " ", represents a data
The end of bag.
Table 2
Packet occupies 22 bytes in table 2, and the form of wherein separator, temperature, humidity and bag tail is identical with table 1；Bag
Head is then fixed as that "@N ", it is the Monitoring Data in control box to represent notebook data bag；The data format of intensity of illumination is " 00025 ",
Represent this moment intensity of illumination as 25Lux.
2nd, milk tank vehicle gateway
Milk container sensing node arranges 4 altogether in the present invention, wherein 3 are located on milk storehouse, 1 in control box；Institute
It is because the experiment milk tank vehicle that we select is 4 milk storehouse milk tank vehicles to be 4.Milk tank vehicle gateway according to regulation packet lattice
The location data for effective Monitoring Data and the gateway collection that formula collects 4 nodes is transferred to given server.Packet lattice
Formula is as shown in table 3, the 2nd row digitized representation byte number in table.
Table 3
Packet occupies 101 bytes in table 3, wherein separator using "；”；Packet header is accorded with by opening flag and car number
Composition, such as：" it is Monitoring Data of the numbering as 001 vehicle that ＄ 001 ", which represents notebook data bag,；Node A, B, C represent the milk storehouse of monitoring,
Node N represents the control box of monitoring；Longitude data form is " 118.83850E ", represents 118.83850 degree of east longitude；Latitude data
Form is " 32.03780N ", represents 32.03780 degree of north latitude；Bag tail form is " # ", represents the end of a packet.
Low temperature breast cold chain transportation
The data packet format of wherein low temperature breast refrigerator car integrated terminal is as shown in table 4,
Table 4
Packet occupies the lattice of 57 bytes, wherein separator, temperature 1, humidity 1, temperature 2, humidity 2 and light intensity in table 4
Formula is consistent with table 1,2；Its middle wrapping head, bag tail, longitude are consistent with table 3 with latitude format.
It is described above various embodiments of the present invention, described above is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.In the case of without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes will be apparent from for the those of ordinary skill in art field.
Claims (5)
1. a kind of dairy products cold chain transportation intellectual monitoring method for early warning, it is characterised in that set lactogenesis temperature safety in milk container and change
Threshold value is μ1, the safe change threshold of milk container interlayer humidity is μ2, the safe change threshold of intensity of illumination is μ in control box3；In milk container
After sensing contact power-up initializing, power-consumption control system reads the output interface LBO of battery voltage monitoring module output shape
State：
(1) if LBO outputs are high level, the temperature averages T of each milk storehouse both sides of milk container is gatheredi, humidity average value Ri, adopt
Collect intensity of illumination L in control boxi, the temperature averages T of each milk storehouse both sides is gathered after 5s againi+1, humidity average value Ri+1With
Intensity of illumination L in control boxi+1；
If | Ti-Ti+1|≤μ1、|Ri-Ri+1|≤μ2And | Li-Li+1|≤μ3, then T is madei=Ti+1、Ri=Ri+1、Li=Li+1；If | Ti-
Ti+1|≤μ1、|Ri-Ri+1|≤μ2With | Li-Li+1|≤μ3There is a condition to be unsatisfactory for, then node immediately passes through bluetooth module hardware
Component sends current cell voltage state and monitoring factor data to gateway；
If three conditions meet always, current cell voltage state and monitoring factor data are sent after 5min to gateway；
(2) if LBO outputs are low level, to avoid, because of the false alarm of the reasons such as power supply noise, after carrying out delay process again sentencing
It is disconnected, battery electric quantity deficiency is represented if being low level if still output, the frequency acquisition to monitoring key element is reduced at once and increase is sent out
The time interval of Monitoring Data is sent to extend service time of battery.
2. dairy products cold chain transportation intellectual monitoring method for early warning according to claim 1, it is characterised in that be provided with milk container
Milk container sensing node, by power supply module, power-consumption control system, sensing module, low-power consumption short range data transmission module, battery
Voltage monitoring module etc. forms, power-consumption control system, sensing module, low-power consumption short range data transmission module and cell voltage
Monitoring modular has power supply module power supply；Sensing module, low-power consumption short range data transmission module, power-consumption control system and electricity
Cell voltage detection module receives power-consumption control system control.
3. dairy products cold chain transportation intellectual monitoring method for early warning according to claim 2, it is characterised in that power supply module is adopted
With 3.3V poly-lithium batteries；Power-consumption control system is low-power consumption microcontroller minimum system, and low-power consumption microcontroller is adopted
With STM8L101F3P6, its operating voltage range is between 1.65V~3.6V.
4. dairy products cold chain transportation intellectual monitoring method for early warning according to claim 2, it is characterised in that sensing module bag
Sensor containing two-way and regulation circuit, two-way sensor are connected with regulation circuit；The combination of two-way sensor has two kinds：Humiture
Sensor+optical sensor；Temperature Humidity Sensor+Temperature Humidity Sensor；Wherein the first is combined for the milk outside milk storehouse
Tank car node, is combined for the milk tank vehicle sensing node in control box for second；According to milk container sensing node placement location
Difference selected.
5. dairy products cold chain transportation intellectual monitoring method for early warning according to claim 2, it is characterised in that low-power consumption short distance
USR-BLE100 modules are selected from data transmission module, the module is the low-power consumption Internet of Things module of a support bluetooth 4.1, is propped up
Hold the bluetooth BLE agreements of standard；Battery voltage monitoring module uses CN301, and it is a extremely low power dissipation battery voltage monitoring core
Piece, the scope of operating temperature is -40 DEG C~+85 °, and output pin is exported using CMOS, its up input threshold value and descending input
Threshold value determines the low and high level of output end, and the sluggishness between up threshold value and descending threshold value can be eliminated due to a variety of causes
Output level is disorderly caused by caused power supply is unstable.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109359763A (en) * | 2018-09-03 | 2019-02-19 | 华南理工大学 | Dairy products cold chain transportation paths planning method based on calendar variation |
| CN112232836A (en) * | 2020-10-19 | 2021-01-15 | 杭州立高检验检测技术研究院有限公司 | Dairy product data monitoring method, system, device and storage medium |
| CN112849302A (en) * | 2021-02-08 | 2021-05-28 | 江苏惊蛰智能科技有限公司 | agv energy management system |
| TWI754796B (en) * | 2019-03-13 | 2022-02-11 | 統一企業股份有限公司 | Real-time integrated monitoring method for refrigerated temperature of raw milk logistics |
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2017
- 2017-09-20 CN CN201710878521.0A patent/CN107885171A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109359763A (en) * | 2018-09-03 | 2019-02-19 | 华南理工大学 | Dairy products cold chain transportation paths planning method based on calendar variation |
| TWI754796B (en) * | 2019-03-13 | 2022-02-11 | 統一企業股份有限公司 | Real-time integrated monitoring method for refrigerated temperature of raw milk logistics |
| CN112232836A (en) * | 2020-10-19 | 2021-01-15 | 杭州立高检验检测技术研究院有限公司 | Dairy product data monitoring method, system, device and storage medium |
| CN112849302A (en) * | 2021-02-08 | 2021-05-28 | 江苏惊蛰智能科技有限公司 | agv energy management system |
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