The use of temperature RFID tags in mechanical diagnosis and cold chain logistics
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Preface
The temperature RFID tag independently developed and manufactured by Baorong Yingfeng (Bisha) Technology Co., Ltd. has been widely used in mechanical temperature monitoring and cold chain transportation. Since 2006, this temperature tag has been exclusively used by Siemens in Europe. In the chain project, the two parties have established a close cooperative partnership.
In terms of mechanical temperature monitoring, RFID temperature tags with high-temperature and high-precision recording are provided to the subway to be installed on important parts such as the power supply, engine, and wheels of the train, and the temperature is analyzed whether the equipment is ready to enter abnormal work or is about to fail. . The 2.4GHz wireless transmission of temperature information completely changes the previous management mode of manual inspection of train equipment. The site collects abnormal temperature information in real time, and provides early warnings to the subway control center many times, preventing the train from staying on the running road, saving the subway a major economy Benefits and maintained a good image.
In terms of cold chain transportation, the cold transportation professional vehicle positioning management system is an open positioning monitoring platform that integrates GPS/temperature detection technology, electronic map and wireless transmission technology. While the temperature data in the refrigerated vehicle is collected, transmitted, recorded and alarmed for over-limit temperature, it also effectively tracks and locates the resources of the refrigerated vehicle.
Case: Successful application of online diagnosis of Hong Kong subway train equipment
1. Implementation background
The subway that connects Hong Kong and Shenzhen carries hundreds of thousands or even millions of people every day. There is a train every 3 minutes, and there are about 30 trains on the whole line. Because the train service time is as long as 18 hours a day, and the stay time at each station is as short as 1 minute, it was difficult for the subway to check the health of the vehicle in real time. The power system, power supply system, etc. often experience abnormalities during train operation after high temperature or long-term operation, causing the train to stay on the road for many times, and the railway traffic condition is delayed for several hours. Multiple trains are stranded, and tourists travel on the mainland. It is difficult to estimate the economic losses caused during the period, the peak period of Hong Kong people’s return home, and the peak period of commuting.
Even when the train returns to the factory, engineers cannot test and inspect hundreds of important equipment on each train one by one. The inspection takes a long time and requires experienced technicians to judge the possible problems of the train during operation based on the train’s condition in the factory. Each component is expensive, but testing is extremely lacking.
Two, RFID temperature control can also be a train doctor
From the start of the system to the present, the subway has sent back information through temperature control, and successfully detected train failures in advance, preventing the train from becoming paralyzed on the road. The inspection technicians of the main plant changed the inspection process and connected to each station through the WIFI network to receive the equipment temperature information of each train, so as to realize remote diagnosis and repair immediately after returning to the factory.
3. Excellent performance of temperature label
1. The tag can record and store information such as temperature points, clocks, tag battery status, and the storage space is up to 1000 pieces of information. When the train passes the station, the temperature information can be completely transmitted in less than 20 seconds. The control center can view the health status of each device. Really achieve real-time reporting every minute.
2. The temperature tag collection temperature environment supports ultra-high temperature (+220℃). Using the superior PT100 temperature probe, the label temperature calibration report has been certified by authoritative organizations, including the National Bureau of Metrology.
3. The temperature label can be closely attached to the instrument, and the fixing method currently provides circular and cylindrical probes, which greatly reduces the temperature difference caused by poor contact.
4. The existing probe cable supports the characteristics of +220℃ high temperature resistance, compression resistance, and tensile resistance. The length of the probe cable can be up to 300cm, and it can be flexibly installed in various harsh environments under the car.
5. The label has an advanced power-saving mode and an open setting function. Users can independently set the sending interval, receiving interval, recording start, and recording interval of the temperature label. When the train returns to the terminal at night, it enters the stop recording mode.
Solution: Application of RFID in cold chain logistics
1. Implementation background
Logistics and transportation must have real-time visual temperature control from unloading, packaging, storage to conveying, in order to maintain the original value, so that users can eat and use comfortably. The complete record of the temperature of the environment in which the materials are located in cold chain logistics has a positive effect on its preservation and the investigation of the cause of the problem. BisWin’s self-developed temperature tag combined with RFID and modern sensing technology can measure and record the ambient temperature of the material while identifying the material, and determine in real time whether the ambient temperature of the material exceeds the allowable range during storage and transportation. , To achieve the traceability of the whole process of quality.
Two, program introduction
1. Temperature label:
2.45GHZ series temperature label, with anti-low temperature, waterproof, condensation and other functions, suitable for long-term signal transmission and temperature recording in the cold car body. The collection temperature environment is divided into normal temperature (-30°C~+120°C) and very temperature (-80°C~+120°C, or 0~+200°C). In the cold chain and hot chain environment, choose the appropriate model of products independently. At the same time, it can effectively understand the over-temperature alarm and master the dynamic law of temperature changes. The user can independently set the temperature label sending interval, receiving interval, recording start, and recording interval. For example, during the transportation of ice cream, the ice cream must be kept at a constant temperature of -20°C during the transportation. If it stays above 2°C for more than 10 minutes, the taste of the ice cream will change and the ice cream will also be deformed. In order to prevent quality problems of the ice cream, the user can The sending interval and receiving interval of the label are set to once every 5 minutes, the over-temperature alarm is set at 2°C, and the recording start function is activated to monitor the temperature changes during ice cream transportation with limited effectiveness.
2. Gain controllable reader:
In logistics and transportation, the power supply and appearance design of the reader are fully compatible with the on-board environment, and the on-board power supply can be implemented; the reader can be placed on the front platform of the front co-driver or the position of the DVD space without changing the device or layout in the car. It does not affect the operation of the driver and the co-driver; its antenna is omnidirectional and extended, which can identify and track the object and target of the cabin temperature monitoring in all directions. Users can adjust the recognition distance of the reader according to actual needs to make the recognition range more accurate. Cooperating with the existing vehicle-mounted GPS all-in-one, BisWin provides embedded readers or external readers such as USB ports and RS232 ports to share the GPRS data transmission channel.
3. Deal with the central control:
The processing center is connected with the reader and placed in the cold car cab position. Through the processing center control, the setting management mode can be adjusted intelligently and flexibly, and finally the management target temperature is realized; the data is optimized by the center control and then uploaded by GPRS. Avoid packet loss due to excessive data flow transmitted through GPRS; when the temperature is higher than the set temperature zone, the processing central control will automatically alarm and prompt relevant drivers, recipients, shippers and other personnel to take action Measures: through the door sensor, the platform can display whether the door is opened and the number of times and duration of door opening during transportation, which can effectively monitor the temperature changes of items during transportation and reduce the occurrence of excessively large door openings due to too many times or too long Fuel consumption; you can set the working mode of the transportation vehicle when it starts/stop, and select the data that needs to be uploaded.
4. Operating platform:
The platform service includes four powerful functions: the operating platform is built under the B/S architecture, and the high-speed cloud computing platform is used; users can understand the real-time geographic location and real-time monitored temperature conditions of transportation vehicles on the road; BisWin platform compatible data Import function, upload three-party sharing; for the WMS platform already in use, customers can choose to use the Webserve interface.
Three, application scenarios
A. Thermostat storage
The thermostat is the most common application environment with the largest number of items in the cold chain and the hot chain. The probe of the thermostat smart label provided by BisWin is put into the thermostat through the hole to monitor the temperature inside the thermostat in real time. It is suitable for hot chain catering distribution, seafood food, blood package distribution, etc. After long-term laboratory verification of aging tests and rich experience in project use, our temperature label is suitable for high temperature disinfection at 100°C. The installation of the system is simple. You only need to put the label probe into the incubator, the label shell is tightly attached to the outside of the incubator, and the RF antenna is introduced into the compartment to complete the temperature data collection.
B. cold storage
In order to integrate the integrated intelligent management of the cold chain and save system costs, BisWin provides a cold storage temperature monitoring system. The GPRS+ temperature probe of the temperature sensor is fixed in the cold storage, and the temperature data is transmitted through the GPRS and GSM modules fixed outside the cold storage. In response to abnormal heating or cooling, after the background monitoring and alarming, the staff quickly took measures to reduce the temperature or heating. , Thereby reducing or avoiding losses.
C. Cold storage
The temperature tag is directly placed in the cold car compartment to monitor the temperature of the transported goods. Put the reader in the cab, introduce the RF antenna into the cold compartment, put the temperature tag directly in the cold compartment, and find a suitable location to fix it. Through the reader, the temperature change in the cold car is transmitted to the temperature control center in real time. The control center is responsible for information exchange with intelligent vehicle terminals, classification, recording and forwarding of various short messages, network interconnection with other related functional departments, and the flow of business information between these departments; at the same time, it monitors and manages the entire network status . It is suitable for blood, vaccine fresh food, ice cream truck, frozen meat, distribution, etc.
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