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1. System overview
At present, hotels, hospitals, baths and professional washing companies are dealing with thousands of work clothes and linen handover, washing, ironing, finishing, storage and other processes every year. How to effectively track and manage each piece The washing process, frequency, inventory status and effective classification of linen are a great challenge. The traditional washing industry mainly faces the following problems:
1. Handover of paper washing tasks, complicated procedures, and difficult inquiries;
2. Due to the fear of cross-infection, the statistics of the quantity of certain linens to be washed cannot be carried out. The mismatch between the quantity of washed and collected is prone to commercial disputes;
3. Each step of the washing process cannot be accurately monitored, and the linen has a missing treatment link;
4. The problem of accurate classification of washed linen
This system uses RFID radio frequency identification technology, applies UHF laundry tags to the intelligent management of laundry, and builds an efficient work platform for fast collection, sorting, automatic inventory, and collection of laundry in the laundry industry. Greatly improve work efficiency and reduce error rate. Compared with traditional manual management, this system has the following characteristics:
1. Batch scanning and identification, no single scanning, convenient for manual transfer and management work, convenient and quick to use;
2. Improve work efficiency and economic benefits, save personnel expenses, and reduce costs;
3. Fully automatic design to improve service quality;
4. Can accurately distinguish customers, laundry categories and their due preferential services;
5. Record customer information and laundry statistics, generate various reports, and query and print information at any time.
6. The system is sensitive and reliable, and the equipment is safe and durable;
The core idea of the system is to use the uniqueness of UHF RFID tags and the reader can quickly scan batches at a long distance. The specific characteristics of the hardware equipment are as follows:
1. Label uniqueness and anti-counterfeiting. Each chip has its own “ID card”: the only digital code in the world, and this digital code has been solidified in the chip during production in the factory and cannot be changed, and there is a storage area , Can store information such as the category and customer of the label.
2. The reader has high reading rate and high stability; reliable recognition distance is not less than 6m; reliable recognition of fast moving targets up to 80km/h; recognition rate up to 200 tags per second;
3. It can realize the simultaneous reading of multiple tags in the reading and writing area, and has the function of anti-collision;
4. High information security and confidentiality performance;
Compared with traditional manual management, this smart laundry application system has the following advantages:
1) Reduce manual management work, convenient and quick to use;
2) Improve work efficiency and economic benefits, save personnel expenses, and reduce costs;
3) Fully automatic design to improve service quality;
4) Be able to accurately distinguish customer types and preferential services;
5) The system is sensitive and reliable, and the equipment is safe and durable;
6) Record and save customer information and laundry records, and can query and print information at any time.
2. System design
Each hotel, including restaurants and several banquet areas, needs to use textile tablecloths, and there are hundreds of rooms that need to be provided with bathrobes, bed linens and towels, which are quite large. So many textiles have to leave the hotel every day, waiting to be washed, pressed and folded before returning to the hotel. With so many hotels, it is more difficult for washing shops to track the location and quantity of those textiles and confirm that they have all returned.
Some hotels hope to be able to track the number of times each item is cleaned, and estimate the service life of these items based on the number of cleanings. The hotel also hopes to receive an alert when the item reaches the maximum number of cleanings, indicating that the item may need to be replaced. And our RFID application in the washing industry has just solved these needs.
This system is shown in the figure. First, install RFID antennas and readers on the doorways for clothing in and out of each customer hotel. The readers transmit data to the client server in the hotel. RFID antennas, readers, and client servers are also installed in the doorways of each laundry shop in the same way. The client server in the hotel and the client server in the laundry are connected to the data center server.
RFID washing industry system network structure diagram
First, RFID tags are installed on each piece of laundry, and the staff writes customer information and clothing information into electronic tags, which are stored in an independent network-based software system.
When the items need to leave the hotel and be sent to the laundry for cleaning, the items are piled up on a trolley and pass through a doorway. An RFID reader with four antennas is installed on the doorway. The reader will obtain the ID number of each item at any moment when the item passes through the doorway, and transmit these ID numbers to the back-end system in the hotel through a cable connection, and then store the data, indicating that the item has been sent for cleaning, and set up Items sent to wash orders.
When the laundry from each hotel is delivered to the cleaning shop, it also passes through a doorway equipped with an RFID antenna and a reader. The reader transmits the ID information of the items read to the laundry server to store the data. So, which hotels have how many clothes to wash in this laundromat, and you can check the number of textiles when they leave the hotel and the number of clothes that enter the laundromat.
After sorting, it enters the washing process. After washing, the clothes are sorted and packaged. The electronic label information of all the clothes in the bag is read through the reader again, and the data is checked with the corresponding washing task list, and then sent to Various hotels.
When the laundry returns the items, they still have to go through their respective portals. The software compares the ID numbers of the returned item tags with the ID numbers of the items sent for cleaning to determine whether they have been returned and the quantity is correct, and stores the information again. Business reports can be run in hotels and laundromats. The content of the report records, for example, the frequency of cleaning items, the time of cleaning, and which ones have not been returned.
3. Related supporting products
3.1 Impinj Speedway UHF Reader
1) Comply with EPCglobal Gen2 ISO18000-6C standard and comply with FCC regulations;
2) The reading performance is reliable, and it can work in a dense environment of readers;
3) The tag data rate is up to 640Kbps, 1000 tags are read per second;
4) Containing Linux operating system to facilitate the development and use of middleware and application software vendors;
5) Item-level tagging function; using a single static antenna with 4 ports, no need for separate transmitting and receiving antennas;
6) Passed China’s performance certification and market license in 2007;
3.2 UHF RFID laundry tags
1) The product is small in size, light and thin, durable and soft, not only does not need to worry about water resistance and temperature and other conditions when washing, but also can easily cope with bending and squeezing during washing, so it can be applied to all kinds of clothes , While wearing comfort will not be affected at all.
2) The UHF RFID tag’s feature of instant multi-body reading without contact can greatly improve the work efficiency of clothing management. By sewing one after another UHF washable RFID tags with detailed information entered into the clothing, through tracking and positioning, not only the specific location and status of each piece of clothing can be grasped, but also additional information such as the number of times of use and replacement period. It is clear at a glance, so that the management of clothes, etc. is more efficient and accurate.
3) It conforms to the international standard ISO/IEC18000-6C “EPCglobal Class1 Generation2” of UHF RFID. It can use the readers and antennas currently on the market to read information, so the system construction will be simpler. In addition, the feature of UHF electronic tags that can read multiple RFID tags in an instant without contact will greatly improve work efficiency.
4) It is suitable for a variety of working environments and has extremely high durability.
5) “Waterproof”, “pressure resistant”, “heat resistant”, “alkaline resistant detergent” and other product characteristics ensure the use under various environmental conditions, and the extremely high durability can ensure cycle washing (washing, Drying, ironing) more than 200 times. In addition, it is thin and soft, suitable for sewing on clothes of various textures without discomfort.
6) The product covers a wide range of different bands in various countries and can be read within the same signal distance, which greatly improves the general performance across countries and regions, and realizes the tracking, positioning and management of products on a global scale.
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