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1. Project background
There are various forms of goods, many of which have the characteristics of high value, strong liquidity, and difficult safety management. In order to check or count the real-time status of the goods and track the flow of assets, the branch office needs to waste a lot of precious time and manpower and material resources. . Traditional asset management methods generally rely on non-automated methods based on manual search to record and track management, which is inefficient. As the number of assets increases, the burden on warehouse managers is getting heavier and heavier. It is also easy to omit or repeat the manual inventory, and it is difficult for the actual product to match the book. At the same time, it also increases the difficulty of asset management, often causing problems such as untimely data and high error rates.
2. Project application goals
In order to optimize inventory, improve the efficiency of asset management, grasp inventory status in real time, accurately grasp the flow of assets, realize intelligent, scientific and automated inventory management, effectively control asset loss or idleness caused by poor inventory asset management, and improve Management efficiency and service image, based on 2.45G active RFID technology, mobile handset shelf item search system, withRFIDElectronic tags are used as information storage media and pasted on assets, and the basic information of the assets is stored in the chip, which can realize the information management of finding and positioning items
3. System introduction
This system is suitable for large warehouses, transshipment warehouses, mold warehouses, etc. In the logistics industry such as express companies that put items in the warehouse, when they need to look back for the item, the problem of not being able to find it often occurs, which requires a lot of manpower to organize the item list , Perform manual search work, waste manpower costs and reduce work efficiency, or even fail to find and cause greater losses.
Four, system composition
System monitoring center, RFID electronic tag (acousto-optic search electronic tag) reading and writing equipment
The system monitoring center is a computer server and system application program, which is responsible for receiving the real-time return of the electronic tag information and the area where the tag is located; RFID electronic tags have a unique ID identification function, and according to the configuration, regularly send their own ID and power related information, use It is necessary to enter the electronic tag ID into the system and bind it with the article; it has the function of sound and light search and prompt, and can be made into an anti-disassembly function. The reading and writing device is a mobile industrial-grade handheld reader to read label information. Send acousto-optic search command, the recognition distance is 80m to 100m, the sending command distance is about 50mz, the distance can be adjusted
Five, system characteristics
Send information regularly, time interval and other parameters can be configured wirelessly. When a search command is received, the tag has sound and light prompt functions. The software supports single search and batch search functions. Electronic tags can adopt anti-disassembly processing technology.
6. Introduction of related hardware equipment
1. RW-R680 industrial-grade handheld reader
Product technical characteristics
Operating system: Windows CE.Net5.0 simplified Chinese version
CPU type: SUMSANG 400MHZ, voltage 3.3V
Memory: 128M Flash ROM/128M SDRAM
LCD display: TFT-LED QVGA LCD 3.5″ color touch screen
Data collection: 2.4GHz RFID module, readable and writable
Gain: 5dBi, 32 levels adjustable for receiving, 4 levels adjustable for transmitting
Recognition distance: 0~150 meters (flexible and adjustable)
Recognition direction: omnidirectional
Wireless network: standard WIFI, optional built-in GPRS/CDMA module/Bluetooth
Other options: infrared/GPS/photograph/vibration measurement function/two-digit barcode
Data backup: SD card and FLASH double backup
Secondary development: MS EVC 4.0 and VS.NET 2003
Battery: 3.7V, 3200mAh rechargeable lithium battery, backup battery 17mA (guarantee data not lost within 6 hours), running for more than 8 hours (depending on the application environment), built-in battery management software to monitor and debug battery status.
Power consumption standard: WIFI 1.2W, GPRS 1W, scanning 0.2W
RFID 0.4W, system 0.3W, backlight 0.3W
Industrial grade: IP54 (IEC60529), drop resistance of 1.2 meters
Ambient temperature: Use: -15°C to 50°C Storage: -20°C to 60°C
Physical interface: USB, infrared
Extended storage: SD card with a maximum capacity of 2GB
Dimensions: 190(length)×80(width)×25(thickness) mm
Display part: 100mm×80mm×25mm
Keyboard part: 90mm×60mm×25mm
Weight: 380g (including battery)
Service life: 5-8 years
Certification: Passed China’s national compulsory product 3C certification, passed CE certification, and has the radio transmission equipment type approval certification issued by the Ministry of Information Industry of China
Features
1. Rugged and durable; 2. Beautiful and lightweight appearance, ergonomic design, with excellent professional image style; 3. Built-in one-dimensional and two-dimensional bar code scanners, saving time for data input; 4. Supports at the same time 3 communication modes: WLAN, GSM/GPRS, Bluetooth, it is even more zero time difference to transmit data through wireless technology; 5. Built-in RFID read and write function, support for low frequency, high frequency, and ultra high frequency; 6. Integration GPS global positioning system with a positioning accuracy of 10 meters; 7. It can integrate an infrared temperature measurement module with an accuracy of ±0.1°C, and the measurement range: -30°C to +650°C; 8. It can have a built-in 1.3 million pixel camera; 9. It can integrate measurement Equipment vibration spectrum, displacement, acceleration.
Detailed description
Operating mode
The working mode of the reader is “passive or active”. In general applications, the reader is in the receiving state and receives signals from the “active” active electronic tags in real time. In special applications, you can also write data to tags or change tag performance parameters.
Recognition distance
With the company’s “active” active electronic tags, in a good visual environment, the maximum identification distance can reach a radius of 150 to 200 meters. Compared with passive tags in specific applications, super-strong signal and super-long recognition distance have great advantages.
When users have different requirements for the recognition distance or the application environment is more complicated, active electronic tags with different signal strengths can be selected, and the recognition distance can be adjusted by adjusting the gain of the handheld reader through software.
Recognition speed & ability
When the active electronic tag runs at a maximum speed of 200Km/h within the effective identification range of the reader, stable identification can be ensured.
The reader can read more than 200 active electronic tags at the same time, and the recognition accuracy rate is 99.999%; it can ensure that all identifications are not missed in a very short time.
Communication security
When the reader and the supporting active electronic tag communicate, a special communication protocol is used to verify the legitimacy of the device, and a complete encryption algorithm has been developed to prevent data cracking to ensure data security in the communication process.
2. RW-T738 acousto-optic search for electronic tags
Product technical characteristics
Recognition distance: 0 ~ 100 meters adjustable
Recognition speed: 200 km/h
Recognition ability: 200 frames per second anti-collision performance
Recognition method: omnidirectional recognition
Variable gain: 0～3 levels can be selected on demand
Working frequency band: 2.4GHz, can be loaded with active 125KHz module
Communication rate: 250K, 1M, 2M b/s three options
Communication mechanism: Based on HDLC time division multiple access and synchronous communication mechanism
Anti-interference: channel isolation technology, multiple devices do not interfere with each other
Security: Encrypted calculation and security authentication to prevent link detection
Read and write function: 176B or 1KB storage space (optional)
Features: 4-color bright LED light, 1 buzzer, dual buttons
Anti-dismantling function: Anti-dismantling alarm function (optional)
Power consumption standard: The average working power is microwatts
Battery configuration: Cylindrical lithium manganese battery with a capacity of 2200mAh
Service life: about 3 years, replaceable battery
Voltage detection: wireless, LED, and buzzer can warn at the same time when the voltage is low
Packaging characteristics: ABS+PC material, resistant to high-strength drop and vibration
Environmental characteristics: Working temperature -40℃ ～+85℃
Working humidity<95%
Reliability: moisture-proof and dust-proof, meeting the requirements of industrial environment
Shape: Long strip, OEM customized service can be provided
Size: 82×27×24 mm
Weight: 46g
Installation method: double-sided adhesive paste or lanyard, screw fastening
Find function
The tag adopts “active or passive mode” to work, the tag actively emits a signal or is triggered by the instruction of the reader (or low-frequency activator) to emit the signal. The frequency of sending is adjustable.
After the tag receives the search command from the reader, the 4-color LED light will flash and beep for the specified number of times (settable); at the same time, the reader will return the result to the host computer to inform whether it has been found . After following the sound and light prompt to find the label (representative item), you can short press any button on the label to terminate the sound and light prompt. (For power saving considerations, long press the right button to close or open the label)
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