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Fixed assets management system based on RFID

Release date:2021-12-28Author source:KinghelmViews:176


1. Project Overview


    In the enterprise fixed asset management business, fixed assets are directly used by the material procurement department, or transferred to production and operation after the completion of the project to form fixed assets. In-use fixed assets have been replaced by technological upgrading and replaced from one production site to another, and some fixed assets have to be scrapped due to accidents or natural wear and tear. There are many types of fixed asset business subdivisions of enterprises, and rapid technological updates lead to rapid changes in fixed assets. The physical management mode of fixed assets of enterprises is shown in the following figure:



    In the past asset management business, the following problems commonly existed:
   

● Registration and inventory work
Fixed assets purchase approval form When purchasing fixed assets, a card account must be registered for each fixed asset, and the serial number, value, and receiving department of the fixed asset must be written in considerable detail, and then registered and kept according to the card account. A uniform number is affixed to each fixed asset to facilitate verification. To depreciate the fixed asset at the end of each month, it is necessary to register the depreciation in the ledger. This kind of work is repetitive and the number of account books is huge. Errors often occur in specific work, and it takes a long time and takes up a lot of staff time. Moreover, manual transcription of physical information and information modification of state changes are weak links to ensure the consistency of "accounts, objects, and cards". Because of this weak link, it will still lead to "account discrepancies", which also restricts the maximum management effect of the management information system.

    ● Depreciation of fixed assets
    The value of fixed assets is accrued monthly as current expenses. Therefore, the depreciation of fixed assets is not calculated every month. From the perspective of work difficulty, it is not difficult. The problem lies in the large number of fixed assets, and each asset is There are corresponding cards, and different assets have different lifespans, and the methods of depreciation are also different. In the processing of depreciation work, it is often necessary to register several thick stacks of books and cards, and the workload can be imagined. In particular, this kind of repetitive and tedious work will cause inevitable errors, resulting in distortion or even loss of the information reflected in the relevant reports.
    Therefore, due to various reasons, the business management system only obtains accurate and inaccurate data (such as asset depreciation, book value, inventory quantity, etc.), which will not only lead to the loss of assets, but also cannot accurately reflect the business results and performance of the enterprise. However, because the information is not reflected in a timely manner, the operational efficiency of the enterprise is affected, resulting in repeated asset purchases. There is no point in analyzing and making decisions accordingly.

Second, the application of RFID technology

    In order to solve the problem caused by the weak link of manual transcription of on-site fixed asset information, the following must be done:
    

● Automatic long-distance batch collection of physical information;
● Write the management data information (or inspection records) and the physical information into the electronic label, and the electronic label is installed (pasted) on the physical body;

  ● The information collected is not only the serial number of equipment (assets) and fixed assets, but should have the same information as the equipment (fixed assets) ledger;
    ● When the management data information changes (or during inspection), the relevant information will be modified (or recorded) on the spot; (report the physical information to the management system)  

● According to the physical change information, start the relevant business process to update the equipment (assets) and fixed asset ledgers in real time to ensure that the management data information is consistent with the scene;
RFID is a non-contact automatic identification technology. It automatically identifies the target object and obtains relevant data through radio frequency signals. The identification work does not require manual intervention. The foundation of integrity.




3. System plan

    Fixed asset management is an important part of enterprise management. Fixed assets have the characteristics of high value, long service life and difficult management. In view of these problems, computer and radio frequency data acquisition technology are used to realize the information management of fixed assets.

 3.1 System Hardware Architecture


    The RFID physical management system is mainly for real-time online visual management of fixed assets. The dynamic tracking and positioning management of the increase, change and scrapping of fixed assets can quickly and accurately count the fixed assets. Its basic hardware architecture is as follows:


  3.2 System functions

   3.2.1 Card issuance

   Using the RFID card issuer, the fixed asset identity information is written into the RFID tag, and the RFID tag is bound to the corresponding asset to generate basic data information for fixed asset management.

   3.2.2 Inventory management


    Deploy RFID identification equipment at the inbound and outbound points of fixed assets, as shown in Figure 3.2:



Fig3.2 In-out library subsystem


    When the fixed asset is in and out of the warehouse, the RFID reader transmits a radio frequency signal through the antenna, and the RFID tag on the asset obtains the induced current, so that the RFID tag acquisition ability is activated and sends its own code and other information to the reader. After receiving the information and uploading it to the asset management application system through the network, the system automatically completes the identification of asset identity and registers asset information, such as asset model, asset number, entry and exit time, handler, approver, etc.; and grasps the flow of assets in real time.

    At the same time, the system can also verify the identity and authority of the recipient. When there is a discrepancy, the system will automatically alarm. The system can provide functions such as query, analysis and statistics, and printing, which greatly improves the informatization level of asset management.

   3.2.3 Inventory

    Before inventory, download fixed asset information to handheld RFID device. During the inventory, both misplaced and missing assets are focused on the application. Operators can update inventory count results through the user interface. After the inventory is completed, when the application is connected to the computer network, the data results are uploaded to the RFID system. The working method of inventory is shown in Fig. 3.3.


Fig3.3 Inventory subsystem
   Inventory counting refers to updating asset locations and identifying misplaced or missing assets. Unlike barcodes, RFID readers do not read tags individually, and maintain a positional association between RFID tags and racks. This enables operators to be alerted if missing or emerging assets are found during tag scanning.
   3.2.4 Others


     ● Daily asset management function
   It mainly includes daily work such as adding, modifying, withdrawing, transferring, deleting, splitting, calculating depreciation rate and residual value rate of fixed assets.
     ● Asset depreciation
    Including the provision of monthly depreciation of fixed assets, printing monthly depreciation reports.
     ● Fixed Assets Monthly Report
    According to the unit, department, time and other conditions, query the monthly (annual) report of classified statistics, the monthly report of adding fixed assets this month, the monthly report of reducing fixed assets this month, the monthly report of fixed assets depreciation (annual report), and provide printing function.


   ● Comprehensive query of fixed assets


    You can query the status of a single or a batch of fixed assets. The query conditions include asset cards, storage conditions, valid asset information, department asset statistics, withdrawn assets, transferred assets, historical assets, name specifications, start and end dates, unit or department.


    ● System maintenance function

  

The asset classification code table, exit method code table, purchase method code table, storage place code table, department code table, storage personnel table, and unit name table are listed by the system administrator. Perform operations such as adding, modifying, and deleting.

Provides the operator with the function of modifying his own password.

     The system administrator can freely set the operation authority of each subordinate operator to the function.


      ● Security management function
   

Provide a variety of safety management means.
Password management function: maintain account and password.


    Permission control function: divide users into different levels to determine the user's permission to use the system, and determine different operations according to different permissions.



3.3 Application benefits

    The introduction of physical information collection tools using RFID technology can effectively solve the bottleneck problem of fixed asset data analysis and collection input and real-time recording of fixed asset actual consumption information. It can truly reflect the actual situation and actual distribution of fixed assets, truly achieve online and visual management, achieve the unification of physical objects and management ledgers, completely realize the unification of accounts, cards and objects, and realize the integrated visual management of physical objects and management systems.

4. System topology






5. System flow chart





6. System function





7. Mobile management platform




8. Application benefits





 

Nine, equipment selection




   The application of RFID technology in fixed asset management has huge advantages, and it has a very important impact on improving the management efficiency of physical assets, tracking and managing the full life cycle of physical assets, and strengthening supervision and monitoring. The key to RFID technology is the speed and accuracy of data collection, and its core equipment lies in fixed readers and handheld devices.

    9.1 Stationary reader


    The fixed reader is mainly to complete the in and out of the fixed assets of each circulation node, and it is necessary to collect the incoming and outgoing fixed assets in batches, quickly and accurately.


    FU-M6-A is a four-channel UHF RFID reader, which has a high-speed reading capability of 750 tags/second, and can be connected to up to 4 antennas at the same time. Guaranteed not to miss reading. At the same time, FU-M6-A has super anti-interference ability, can adapt to various harsh industrial environments, supports WIFI connection, and can be deployed in key nodes more easily and flexibly.



Label Protocol

EPCglobal Gen 2 (ISO 18000-6C) DRM support; ISO 18000-6B (*optional);

I-PX (*optional)


Antenna Connector

4 reverse TNC connectors; supports 4 independent antennas

RF output

Independent read and write mode, 5 to 31.5dBm output (1.4W), ± 0.5dBm adjustable

Frequency characteristics

FCC(NA,SA)902-928MHz;ETSI(EU) 865.6-867.6MHz;MIC(Korea)910-914MHz;SRRC-MII(P.R.China);920-925MHz   

Communication Interface

10/100 Base-T Ethernet;

Wireless network (optional)

Built-in 802.11 b/g (*optional);

Tag readability

Greater than 750 tags/sec

Label reading distance

Greater than 30feet (9 M) with 6dBi antenna (36dBm EIRP)

Maximum read and write EPC ID length

Up to 496bits

operating system

Linux kernel version 2.6

    9.2 Handheld Devices

    Handheld devices are mainly used for fixed asset search, inventory and daily business process processing. It involves many functions and has a wide range of applications, which puts forward higher requirements for the RFID reading module in the device.


    ThingMagic M6e-Micro, an ultra-high frequency RFID mold with ultra-small module structure design and excellent "fast search algorithm", can be embedded in various commonly used handheld and portable devices. It has a reading speed of up to 750 tags/second for tags, low power consumption, and quick response after receiving commands. At the same time, it has a superior multi-label anti-collision algorithm, which is especially suitable for inventory in warehouses; its unique adjustable power from -5dbm to +30dbm can be easily applied in fixed asset management, and it is suitable for fast search, inventory and Daily stable work provides a guarantee.

Label Protocol

EPCglobal Gen 2 (ISO 18000-6C) DRM support; ISO 18000-6B (*optional);

I-PX (*optional)


Antenna Connector

2 x 50 ohm UFL connected to the edge of the machine or motherboard, supporting 2 independent antennas

RF output

Independent read and write mode, -5 to 30dBm output, ± 1dBm adjustable

Frequency characteristics

ETSI (EU, India) 865.6-867.6 MHz;TRAI 865-867 MHz (India);KCC (Korea) 917-920.8 MHz;ACMA (Australia) 920-926 MHz;SRRC-MII (P.R.China) 920-925 MHz;Open (Customizable channel plan;865-868MHz and 902-928 MHz);

Connector

Stamp hole connector connection mode with 28 pins (including power supply, communication and GPIO)

Communication Interface

Serial asynchronous communication, 3.3V or 5V logic;


Baud rate 9600-921, 600bps;


USB2.0 hardware interface (up to 12Mbps)


Restart and Shutdown Control


Tag readability

Greater than 750 tags/sec; use high performance settings

Label reading distance

Greater than 30feet (9 M) with 6dBi antenna (36dBm EIRP)

 9.3 Equipment List

serial number

Product name

model

Function

quantity

other

1

Fixed reader

FU-M6-A

Reader

1

2

antenna

RAA915-9R40

Reader Antenna

4

3

RF cable

定制

RF cable

4

4

Mobile Handheld Terminal

W9900X

mobile job

1


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