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Singapore Seamark Intelligent Weighing Management System

chrispeng January 5, 2022 Shipping

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Intelligent weighing management system solution

1. System overview

With the continuous development and widespread use of electronic technology, automatic control technology, computer technology, communication technology, and sensor technology, after 1998, my country’s weighing instrument industry began to introduce automatic identification systems, starting from image recognition, infrared recognition, and IC card recognition. Developed to the present long-distance radio frequency identification. Radio frequency identification is winning the favor of more and more enterprises with its unique high performance.

At present, the system has been widely used in customs, mining, metallurgy, petrochemical, thermal power plants, large garbage disposal plants and other industries. It solves the problem of large enterprises and freight yards in front of truck scales and vehicles lining up and weighing, and improves the production efficiency of enterprises. Put an end to human error, which is conducive to the automation of enterprise management.

2. The working principle of the system

This system is developed on the basis of Smartkey channel control technology. It is a high-tech product integrating computer automatic control technology, radio frequency automatic identification technology, sensor technology, and IC card induction reading and writing technology. This system requires that each car that needs to be weighed be equipped with a long-distance electronic label, which is pasted on the windshield of the car. Install a receiving antenna on the side or top of the truck scale, and connect the reader and the antenna with a dedicated cable.

The workflow of the system is as follows:

(1) When a car enters the weighing channel of the truck scale, the vehicle detector installed at the crossing immediately senses that there is a car entering, and transmits the signal to the barriers and traffic lights in front. The barriers are immediately closed and the signal lights turn red. , Prompts the driver to drive slowly, and at the same time requires the weighing instrument and reader to start working.

(2) When the electronic tag on the vehicle enters the reading range of the reader, the information of the vehicle will be transmitted to the host through the antenna-the reader. After verifying that the “vehicle identity” is legal, the control signal light will send out the correct Signal, instruct the electronic scale to start transmitting weight information; at the same time, the camera is used to monitor whether the vehicle is parked at the designated position and to capture the image of the vehicle. If the vehicle is parked normally, the weighing signal can be accepted by the computer.

(3) When the host receives the ID number (corresponding to an identification code) and weight information, it accurately records and backs up the relevant information; then, the system sends an instruction to the controller, and the relay on the controller acts to open the barrier, and at the same time The signal traffic light turns green. The vehicle can drive away from the truck scale channel.

(4) Unload at the designated location, and re-identify at the exit of the system after completion.

(5) The host transmits the vehicle-related information to the data management center, and they finally complete the data processing and statistical tasks, and then send the data to the designated place through the local area network.

Three, system characteristics

1.Information collection automation

The weighing data output by the vehicle scale and the electronic tag card number installed on the vehicle are processed by related equipment and transmitted to the computer. The computer immediately displays the weight of the cargo carried by the car and stores it in the computer’s database. Users can perform operations such as querying, summarizing, and printing according to their needs, thereby realizing information collection automation.

2.Strengthen management to prevent favoritism and fraud

One card for one car, the electronic label is pasted on the windshield of the car, which has the function of tamper-proof. Once the electronic tag is torn off the glass, the chip inside is damaged and cannot be used again. Each time the weighing scale weighs, it strictly corresponds to one card and one car. Cooperate with the camera’s image capture function to ensure that the entire system data is foolproof and accurate.

3.Establish corporate image, improve work efficiency, and reduce operating costs

The system performs computer automated network management for all truck scales (weighbridges) in the entire unit, which can easily measure the weight of the vehicle when it is empty and full, and understand the actual weight of the goods loaded in the vehicle in real time, thereby greatly improving the work efficiency of the enterprise.

4.Protect the safety of this area and prevent illegal vehicles from entering

This system can be integrated with the parking lot management system, and only vehicles with legal electronic tags can enter the car cargo weighing area, thereby improving the safety of this area. In terms of refueling tank trucks, it is particularly important.

Four, system composition

The intelligent weighing management system is composed of two parts: electronic measurement and computer monitoring and management. The electronic measurement part is mainly composed of weight sensors and weighing display instruments, which mainly complete the functions of weight data collection and communication with the upper computer. The computer monitoring and management part is composed of computers, printers, radio frequency identification systems, controllers, barriers, and vehicle detection. It is composed of monitor, camera, and video card, which mainly completes the functions of weighing monitoring, printing scales, identifying identity, generating various summary statistical reports and comprehensive query.

1.Long-distance reader

Model: SKRD900

Product Image:

The appearance of the SKRD900 reader is shown in the figure above. It uses a cast aluminum shielding box, which can be installed in an indoor cabinet or an outdoor protective box with good ventilation and dustproof conditions. From the appearance of SKRD900 reader, it has the following characteristics:

(1) All line connections are concentrated on the same side of the reader.

(2) Antenna interface: 1 N type interface

(3) Data interface: 1 RS232 port (DB9 female)-for connection with PC

1 Wiegand interface (Data0, Data1, GND)-output label number

1 RS485 interface (RS485+, RS485-)-input and output commands or data

2 signal input pins:

IN0: When the reader is working in trigger mode, input a trigger signal (trigger on falling edge).

IN1: Ground IN1 to force the reader to enter the debugging state, and check whether the tag is found.

(4) LED indication:

Red light-power indicator, bright means power is on

Yellow light-antenna indicator, on if the antenna is reliably connected, otherwise off

Green light-data communication indication, indicating that Weigand or RS485 or RS232 port is sending and receiving data.

(5) Buzzer: Built-in buzzer, every time the reader reads the electronic label signal, it will sound.

(6) Power interface: +5V DC socket.

Features

(1) Easy to use. SKRD900 is a relatively “dumb” product. Generally, it only needs to connect the reader to the application controller and receive data according to the standard Wiegand26/34 or simple RS485 protocol.

(2) Wiegand data output. Because Wiegand interface is the de facto standard of IC card application industry, SKRD900 provides Wiegand data output interface, which can facilitate the integration of long-distance automatic identification technology with existing low-frequency IC card applications.

(3) Single antenna interface. There is only one antenna interface, which not only simplifies the circuit, but also helps to improve the reading and writing performance of the reader.

(4) Wide application range. The SKRD900 reader can meet the requirements of most users for radio frequency identification applications.

(5) Perfect safety mechanism. Take the method of combining the manufacturer’s authorization of the reader, the user’s encryption of the reader, and the authorization of electronic tags, so that only authorized tags can enter the management area of ​​the automatic identification system, and unauthorized or imitation tags are rejected. Effectively solve the security problem of the automatic identification system.

(6) Stable and reliable: Passive cards are used for electronic tags, which do not have high requirements for the environment and can be adapted to a wide range. The amount of data transmission is small, the signal frequency band is narrow, and the penetrating ability is strong (penetrating walls, roads, clothing, people, etc.). The electromagnetic signal is instantly frequency-hopping and transmitting, and the anti-interference ability is strong.

(7) Anti-dismantling and anti-counterfeiting: Each electronic label card has a unique ID number in the world, this number cannot be re-encoded or modified, eliminating the phenomenon of copying, forgery and cheating. The electronic label card is glued together with the car glass with special glue. If it is disassembled, the electronic label will be destroyed (anti-disassembly function) to ensure the one-to-one correspondence between the license plate number and the card number, thus completely solving the problem of confidentiality and anti-counterfeiting.

Product performance index

(1) Working frequency: 902MHz～928MHz

(2) Working mode: work in a broad-spectrum frequency hopping (FHSS) or fixed frequency transmission pulse mode

(3) Sensitivity: multi-level adjustable

(4) Card reading speed: the average reading of a single card is less than 10ms per 32bits

(5) Security mechanism: able to check the legality of electronic tags

(6) Card reading mode: automatic card reading at regular intervals, or input trigger signal to control card reading

(7) Data output interface:

A Wiegand 26/34 port, compatible with the existing domestic IC card application controller.

An RS485 port or RS232 port can carry out two-way data transmission, and the communication protocol is open to users.

(8) One N-type microwave antenna interface

(9) Light-emitting diode (LED): red light indicates power, yellow light indicates whether the antenna is connected, green light indicates the communication status of the data output port

(10) Power supply: with 220V AC input + 5V DC output converter

(11) Power consumption: peak power is less than 12W

(12) Dimensions: 240mm*200mm*42mm

(13) Weight: aluminum alloy shell, the whole machine weighs about 3.0Kg

(14) Working temperature: -25℃~＋55℃;

2.Microwave antenna

The radio frequency antenna is installed on the side or top of the truck scale lane and connected with a dedicated low-loss cable for the reader. The RFA-900B antenna provided by our company is more suitable for the application requirements of this system, with a gain of 12dBi and a beam range of 650×280. If the antenna is mounted on the side, the horizontally polarized antenna RFA-900B/h should be used; if it is mounted on the top, the vertically polarized antenna RFA-900B/v should be used.

3.electronic label

Sticking on the windshield of the car can uniquely identify the weighed vehicle. The electronic tag is required to have a long reading distance and a tamper-proof function. The RFT-9520F electronic tag provided by our company is a 915MHz passive electronic tag, which is packaged in electrical ceramics, has a tamper-proof function, and has a long reading distance, stable performance and long service life.

4. Controller

Model: SK400

Product appearance:

◆ Can control 4 doors

◆ The card capacity is up to 20,000 cards, which can be expanded to 80,000; the number of recorded events is up to 20,000, which can be expanded to 80,000.

◆ 8 Wiegand card readers and 8 RS485 card readers can be connected at the same time, communicating with each other without interference

◆Using 16-bit single-chip microcomputer, the transmission rate can reach 19,200bps, it can receive 64 card data at the same time, and the card reading speed is less than 0.2 seconds

◆ The system supports up to 32 controllers to the power of 10 (32 controllers in each layer, 10 layers in total, for example)

◆ It can be used in stand-alone (offline), directly or connected to the PC through the network, such as TCP/IP

◆ 32 groups of time zone settings; 32 groups of passable groups; 32 groups of holiday settings

◆ 16 DI/DO modules can be connected, each module has 8 DI and 8 DO

◆ Provide 12 input points and 9 output points, which can be expanded to 140 input points and 137 output points

◆ It can be connected to serial input devices via RS232/485, such as printers, LED displays, etc.

◆ It can be connected to card readers of different manufacturers and brands (such as: British Census, HID, TI, Philips Mifare, Motorola, EM, Legic, etc.)

◆ Unique hierarchical design, can control hundreds of millions of door areas, and the available communication distance is far greater than 1200 meters

◆ Security lock: when swiping card + password to open the door, if you enter the wrong password three times in a row, you can lock the card or lock the reader

◆ With multi-door back-and-back function

◆ Unique security password design

◆ It can communicate with PC through RS485 or RS232

◆ Professional appearance design, exquisite production, easy installation, overall size 151×105×35mm

Function Description:

*Security password control; with card plus security password access function, improve the high security control level, this function can also be controlled through the time zone table; when the security password control is in effect, regardless of whether there is a personal password, you need to enter the security password. And when the personal password control time zone and the security password control time zone are in effect at the same time, the security password control time zone also takes precedence.

*Personal password control; with card plus personal password entry and exit function to control the entry and exit of individuals in the restricted area, this function can also be controlled through the time zone table, when it and the security password control are in effect at the same time, the security password is the priority.

*Anti-passback control; It has the anti-passback control of all door zones in a single controller, and the anti-passback control of the door zones in other multi-level controllers. For multi-level controllers, the controller and the controller will automatically communicate with each other.

*Same card delay; you can define the delay time of the same card by yourself to control the continuous induction of the same card within the delay time

*Multi-card authentication; After multiple cards in a single gate area are continuously sensed at the same time, they can enter and exit effectively. This function can also be used with personal passwords or security passwords to enter and exit, and it can be controlled through the time zone table, or this function can be cancelled Processing, this function can set up to 8 cards in and out at the same time

*Reading head lock; when the card sensor is input 3 times wrong password (including personal password and security password), the reader will be directly locked, and other cards are not allowed to be sensed. After the lock time, the card sensing will be restored. This function is only for The read head is controlled

*Card lock; when the card sensor is input 3 times wrong password (including personal password and security password), the card is directly locked, but after the lock time, the card sensor is automatically restored. This function is only for all the readers of the controller. Therefore, within the lock time, all the reading heads of the controller cannot sense.

*Card prohibition; when the card is induced to enter 3 consecutive wrong passwords (including personal password and security password), the card is directly locked and the card is not allowed to be used again. This function is only for the controller, so the controller belongs to All reading heads cannot be sensed, and the system can be locked through the host computer software (all controllers). It must be re-authorized by the relevant personnel before it can be used again, just like a bank card.

*Card loss report; this function is only realized through the host computer software protocol, the purpose is to detect the area used after the card is lost, but there will be no door zone output action

*Automatic door opening time zone; through the time zone table to control automatic door opening, such as the start and end time of automatic door opening and closing.

*Validity period control; the card is automatically invalidated when the validity period expires. It is an automatic function of the controller, not the software protocol of the host computer, and its accuracy can reach up to minutes.

5.Automatic barrier

Function: Accept commands from the controller, execute gate opening/closing actions, and control the entry and exit of vehicles.

technical parameter:

Take-off and landing time: 2-6s adjustable

Length of brake lever: 3-6m optional

Working voltage: 220VAC

Working current: 0.6-1A

Frequency: 50Hz

Insulation class: E class

Noise index: <40db
6. Vehicle detector (ground sense)

Model: SKDS-1224

Generally, a ground-sensing coil should be installed at the entrance and exit of the lane. The first ground-sensing function is vehicle detection. When a car is detected, the front barrier will be closed and the traffic signal will turn red. The second ground sense has the anti-smashing function to ensure that the vehicle will not shut down before completely leaving the automatic barrier. When a car is pressed to the ground induction coil, the iron material of the car body changes the magnetic field of the ground induction coil, and the ground induction module will output a relay signal and transmit it to the host.

7. Other equipment

Camera, video card, weighing instrument

8. Software Module

(1) Weighing processing module

Record various data of each weighing vehicle weighing, store the date of purchase and delivery, weighing time, vehicle number, driver, shipping unit, receiving unit, shipping unit, gross weight, tare weight, additional tare weight, net weight, Adjust the ratio, unit price, total price, name of the weighing member, manifest number and other information. At the same time, save the instant picture when the car is weighed for future inquiries. You can print the weighing list immediately after weighing, or after weighing at will Choose to print, and the format of the scale can be selected.

(2) Statistics summary module

According to the license plate number, cargo name, sending unit, purchase, shipment and other conditions, statistics of weighing records for any time period can be generated, various summary reports and statistical graphics can be generated, and the reports can be freely selected for printing.

(3) Data maintenance module
It can maintain vehicles, goods, sending units, and remarks, automatically perform historical conversion of data, save years of data, and have automatic system recovery functions, so that the system will not be paralyzed due to misoperation.
(4) System security module
Operator permissions and passwords can be set. Operators can only perform related operations after the system management personnel have authorized them. Non-system users cannot enter the system. At the same time, they have the ability to set and modify parameters such as automatic tare, use unit, and print format.
(5) Sharing function
The system has been designed with the functions of networking with the settlement center and production statistics department, and can be connected with related departments through the open database interconnection interface (0DBC) to realize data resource sharing and comprehensive utilization.
Five, system workflow
The connection relationship of the various components of the system is shown in the following figure:

Six, equipment configuration list

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