Analysis: ATM monitoring solution

Analysis: ATM monitoring solution

Original author: Shi Xinhua far Extension Technology

Overview

The ATM digital video surveillance and evidence collection system is designed to meet the banking system's security requirements for ATMs. The system is a perfect combination of advanced digital monitoring technology and the unique application needs of the bank. It is based on an embedded hard disk recorder, PC, and industrial control computer. It has functions such as unattended, simple operation, timely alarm, fast playback, etc. At the same time, the system has a control center Features such as simple configuration, strong system independence, and high confidentiality.

Different from the corresponding analog equipment: ATM digital video surveillance and forensics system does not need to spend time to store and retrieve images. It provides query methods based on address, card number, date, time, alarm log, etc. This storage device without tape can provide high-resolution digital images, built-in patented technology, the screen can be superimposed on the transaction location, date, card number, transaction amount, to provide clear and complete information for picture query. The transaction data is processed by the bank itself to ensure that the core data is foolproof, and features such as removable hard drives and backup drives can be selected, making the ATM digital video surveillance and forensics system the only choice beyond conventional storage devices.

As the number of bank ATMs continues to increase and the scope of use expands, crimes against ATMs have been discovered one after another. There have been many criminal activities of stealing money from legal cardholders and various malignant events that damage ATMs across the country. How to protect the safe use of bank ATMs, protect the interests of legal cardholders and banks, and prevent various crimes against ATMs is an urgent problem to be solved.

For the ATM monitoring program, Yuantuo Technology has comprehensively examined the use of ATMs in various banks, combined with years of experience in ATM monitoring R & D technology assurance, fully analyzed existing and possible criminal behaviors, and considered the bank ’s handling of cardholder complaints. Combining with the development of science and technology and the specific situation of the bank's scientific and technological strength, it is believed that the bank's ATM video surveillance and alarm should be developed in the direction of digitalization and centralized networking. Such a high starting point and forward-looking monitoring model is more suitable for the rapid development of bank ATM business. It is of great practical significance to strengthen ATM management, avoid investment waste, and effectively guarantee the normal and safe use of bank ATMs.

ATM anti-theft card

Nowadays, the ATM anti-theft card has also become a necessary monitoring device for ATM monitoring. Due to the many manufacturers and models of ATM machines and the different shapes, it is difficult for ordinary cardholders to distinguish the appearance of the normal card slot and the abnormal card slot The difference is that it often falls into the traps laid by criminals, which leads to a large number of cases. The installation of a side-tracking piracy code device at the slot of the ATM machine has become the most common form of crime on ATM machines. Although most of the ATMs are currently equipped with video surveillance systems, these single video surveillance systems can generally only be used for evidence collection after the incident, which is not obvious for timely warning and crime prevention. Faced with the complicated card environment for ATMs, the video surveillance system is severely constrained by the inherent defects of the video itself, and the inability to provide timely and effective early warning and prevention capabilities is also an important factor for frequent crimes on the ATM.

The most basic function of the security system is to detect and stop crimes in time, but facts have repeatedly proved that a single ATM video surveillance system has been unable to effectively curb the crazy bank card crimes on the ATM machine. The current form has urgently required the ATM security field to transform from the traditional passive defensive type to the active positive defensive direction.

Second, the program selection

ATM machines and other self-service devices can use a variety of technical means to detect the presence of foreign objects (such as side recorders, code stolen devices, etc.) around the card readers of the self-service devices. The advantages and disadvantages of different methods are summarized as follows:

1. Light judgment: use the reflection principle of infrared light to open some light-transmitting holes around the card reader on the ATM machine, and emit infrared light from the inside of the self-service device through the light hole, when the criminal suspect is installed on the card reader For other devices, part of the light-transmitting holes will be blocked, and it can be determined that there is illegal installation of equipment.

The disadvantage of this method is that it is necessary to punch holes in the ATM machine and destroy the original structure of the ATM machine. In addition, if there are foreign objects (dust, etc.) blocking the light hole or the ambient light changes, false alarms will occur, and the false alarm rate is very high; if the card stolen device bypasses the light hole during installation, false alarms will occur. .

Therefore, this solution is not highly feasible in actual use.

2. Electromagnetic field judgment: use the magnetic field strength sensor or electromagnetic field strength sensing equipment to detect the change of electricity and magnetic field around the ATM machine card reader and compare it with the normal situation. If there is electricity or magnetic field abnormality, it is determined that there is a card theft.

This method belongs to the short-range detection technology, and it is also necessary to drill holes in the ATM machine to change the original structure of the ATM machine. If the ATM machine is a metal shell, the detection equipment must be external, which itself becomes a hidden safety hazard; in addition, in principle As long as there are objects that can change the strength of the magnetic field around, it will be falsely reported. If the detection sensitivity is lowered, it will be missed, and the sensitivity adjustment scale is difficult to grasp.

3. Analyze the image of the ATM machine card reader using image processing technology to find out the characteristics, compare it with the original card reader image, if there is any abnormality, it is determined that there is a stolen device.

This method is sensitive to the illumination of the environment, and has high requirements for image clarity. Once it cannot be met, it will bring a high false alarm rate; of course, its biggest disadvantage is that it has no anti-counterfeiting function. If the installed card thief appearance and color Similar to the original card reader, it cannot be distinguished from the video image, resulting in serious underreporting.

Since the current surveillance camera video has the inherent characteristics of a planar image, it is difficult to solve the identification problem of the camouflage side recording device using planar image analysis. The actual use effect is also very unsatisfactory.

3. The characteristics and advantages of the anti-side recording system based on the principle of laser ranging

There is a common feature for any bank card piracy crime that occurs on the ATM: the installation of side recording devices (code stolen devices, fake keyboards, etc.). Any additional installation means that the physical thickness of some important parts (card slot, keyboard, etc.) on the teller machine has abnormally changed. Real-time judgment of normal insertion can be judged in real time by high-precision laser measurement sensors monitoring the spatial height of these sensitive parts Whether the bayonet is equipped with a side recording device, etc., so that an alarm can be issued during the installation process

demand analysis

1. Under the normal video recording state, the 2-channel images corresponding to the cash outlet and the front of the customer are displayed on the same screen, and can be displayed on the full screen in a single channel.

2. The two-way video recording of the cash outlet and the cash box will be switched and displayed when adding banknotes.

3. The camera has automatic backlight compensation function under strong light.

4. Human activity detector: human body approaching alarm pre-recording and delayed video recording after human body leaving.

5. Retrieving and replaying the stored image data in the state of video recording, should be able to distinguish currency denominations, the facial features of the characters are clearly discernible, and the edges of the image are free of aliasing, trailing, and animation.

6. System failure automatic recovery function (restart after power failure and shutdown), the host should be able to quickly restore to the normal recording state and configuration.

7. Alarm function for video interruption alarm and malicious obstruction of camera, and semi-occlusion alarm function of camera.

8. Data backup and network transmission functions.

9. The monitoring host adopts 3, 4, and 5 embedded hard disk video recorders dedicated to ATM machines. The system is equipped with 3, 4, and 5 color ATM cameras, and is designed according to the 5-channel monitoring, namely: corresponding to the cash outlet, environment, customer front, There is one camera for each cash box, and the video output port of the cash box is switched with the 2-channel video recording of the cash box.

10. The camera resolution is greater than 420TVL, the signal-to-noise ratio is greater than 48dB, the minimum illumination is less than 0.5LUX, and it has functions such as automatic backlight compensation.

11. The operation interface is a Chinese menu interface, remote control and panel duplex operation.

12. The monitoring system has VGA, BNC (video output) duplex output.

13. The recording method should have four selectable modes: manual, timing, alarm and motion detection, and it can have adjustable functions such as pre-recording and delayed recording time.

14. The system can clearly record the frontal image of the drawer, the surrounding environment and the withdrawal operation process, shield the customer password area, and prevent the user password from being recorded.

15. The horizontal resolution of real-time display should be greater than 420 lines, and the horizontal resolution of playback in video recording should be greater than 320 lines.

16. Image quality, in the state of video recording, the playback image should be able to distinguish currency denominations, the facial features of the characters are clear and legible, and the edges of the image are free of jaggedness, trailing, and animation.

17. The hard disk video recorder should use the MPEG-4 or H.264 compression algorithm, calculated according to the normal transaction 6-12 hours per day, and should be able to maintain the image data for 3-6 months.

18. The system should have a password control function of level 2 or higher.

19. The system has an automatic fault recovery function. When a fault occurs (such as a crash), it can automatically recover, and it can quickly restore the normal recording state and correct configuration.

20. With the function of alarming when the video is interrupted, when the camera is maliciously blocked, and when the camera is half-blocked, the system should be able to send an alarm signal.

21. The system can perform duplex operation of recording and playback. During normal recording, query, retrieval and playback operations can be performed at the same time; 2 channels of images on the front of the customer and the cash outlet can be displayed and played back on the same screen, and can be displayed in a single channel full screen.

22. The system should have a data backup function, with a USB port, which can do data backup at any time.

23. With network transmission function, support PSTN, ISDN, LAN multiple networking methods.

24. The system should have a logging function. It records key information such as system, operation, and alarm, and has a log alarm query function, which can quickly find the data at the time of alarm through alarm retrieval.

Design principles and basis

(1) Design principles

1. Complete functions: The system integrates video surveillance, digital video recording, network control, and alarm output, and organically combines them to complete all-round protection.

2. Advanced technology: The selected devices are all technically advanced in the world.

3. Practical and reliable: The entire system can monitor the activities of personnel in the prevention area at any time to prevent accidents.

4. Reasonable investment: The system has excellent quality, high cost performance, and low repair rate. On the basis of meeting the practical needs of the system, the project cost is reduced as much as possible for users.

(2) Design basis

Design Code for Security Work of Bank Business Places GB / T16676-1996

Engineering technical specification for civil closed circuit monitoring TV system GB50198-94

Regulations on the risk level and protection level of bank business premises GA / T70-94

The method of budget preparation for the safety and security project cost estimate GA / T74-94

Safety precautions engineering procedures and requirements GA / T75-94

Relevant regulations of the head office and the Ministry of Public Security

System composition and characteristics ATM

Install a 4-5 channel ATM dedicated digital video recorder ALCATM at each ATM teller machine outlet to monitor the ATM 24 hours a day. Upload the alarm picture to the remote control center via DDN dedicated line or telephone line and other transmission media.

The ATM dedicated digital video recorder in this system adopts the most advanced MPEG4 compression technology, and has the following functions and features:

1. Digital storage

The unique and most advanced MPEG4 algorithm is used to compress the image storage, and the digital resolution can reach 704 * 288 (HalfD1 image quality). Based on an average of 200 transactions per day, image data can be saved for more than 3-6 months. The hard disk can automatically overwrite the stored images, retrieve the recording information according to time and events, and can play back any time period in the hard disk, and the playback speed is adjustable.

2. Card number overlay

Yuantuo Technology has strong software and hardware development capabilities. At present, our company has successfully developed in cooperation with a number of banks, and can extract card numbers for various types of ATMs. At the same time, in our technical plan, we fully consider ensuring the security of bank data. The video overlay of this system can superimpose the card number, date, time, alarm information, etc. on the 4-channel video image in real time, abandoning the channel method, and preventing the overlay information from being easily modified. At the same time, it is convenient for users to make combined inquiries through the card number, date, time and other information. In particular, card number query provides great convenience for users. (The security card number capture must avoid any data exchange with the ATM machine, otherwise it will introduce great security risks)

3. Video and alarm function

The system sensors are set up: human body proximity sensor, vibration sensor, bill exit sensor, etc. to fully detect possible events on the ATM and accurately record the entire process of the event.

â‘ , human activity monitor: using active human proximity detector.

Its main advantages are: when people approach the ATM, the video is triggered, and the detection distance is adjustable, so that it can avoid taking irrelevant images, save hard disk space, and at the same time maximize the entire process of the event. This solution has accurate judgment, low false alarm rate, and high recording efficiency, which can prolong the service life of the equipment, and is more suitable for ATM working methods and monitoring requirements of places.

â‘¡ Vibration sensor: ATM special vibration sensor is used. After the sensor receives the alarm signal, it can carry out the function options of driving the siren and cutting off the power of some ATM devices.

4. Networking function

â‘ , the center can set the parameters of the local machine remotely.

â‘¡ The center receives and transmits images according to the available location, time, card number, alarm signal, etc.

â‘¢ The center automatically polls each monitoring point for normal operation.

â‘£, adopt TCP / IP network transmission or other methods.

⑤, password encryption check on the network.

Perfect network function: can be transmitted through the network, network users can view or playback images; RJ-45 communication interface, network transmission methods include dial-up access, ADSL, ISDN, LAN, metropolitan area network, etc .; support TCP / IP, UDP / IP , FTP / IP network transmission protocol. Internet browsing mode adopts IE browser to browse.

Convenient data backup: Support CompactFlash card and IBMmicrodrive mini hard disk, make the image transfer more flexible and convenient.

The operation is simple and easy to learn: panel operation or using remote control, the Chinese operation interface is clear at a glance (the operation you perform on the device can be displayed on the monitor);

Harsh environment operation: unique convection fan, completely solve the problem of heat dissipation of large hard drives, and never crash;

Standard professional chassis: American technical design, more resistant to pressure and anti-static than traditional civil chassis;

Product features

Use language Chinese / English operation menu

Remote control function A remote control can control 64 machines at the same time through different machine numbers and passwords

Password management uses double passwords, user passwords and management passwords, sub-authority management, convenient and safe

The monitoring method is equipped with single-screen / picture-in-picture / four-screen and other real-time monitoring methods

Compression method Video compression adopts MPEG-4 variable code stream or MPEG-4 fixed code stream. Four audio and video signals are independently compressed in full real time, and the sound and image are always synchronized.

The storage function adopts FAT32 format storage, automatic segmentation, and the video paragraph can be protected. Multiple IDE hard disks can be built in. When the hard disk is full, new files are recorded by loop coverage. The automatic protection of alarm recording data supports CompactFlash card, IBMmicrodrive micro hard disk and network for image transfer Save.

Video function

Multi-tasking, each channel can realize single-channel playback at the same time of full-time recording, data query, setting certain parameters, network monitoring and other recording methods: manual recording, real-time recording, alarm linkage recording, motion detection recording in recording At the same time, single-screen, picture-in-picture and four-picture real-time monitoring and time shift (timeshift) monitoring and playback functions adopt single-channel single-screen playback mode, while playing back, you can monitor the current monitoring screen of the four-channel channels. ： Instant playback, time-selected playback, selected segment playback Multiple playback modes: X2, X4, X12 magnification fast playback, pause, X1 / 2, X1 / 4 speed slow playback, frame playback

Alarm function

4 independent alarm inputs, timing arming and disarming, using external alarm voltage to trigger alarm input 4 independent alarm outputs, using relay switch alarm output, convenient alarm linkage and on-site alarm bells, alarm lights, etc. with video loss Alarm, to prevent man-made damage, motion detection alarm, effectively save hard disk storage space, a single screen is divided into 192 detection areas, 1-16 level adjustable sensitivity, flexible and convenient to use, truly realize unattended alarm input and output interface Hardware protection function to prevent the motherboard from being damaged by external voltage shocks. It has a pre-alarm function (adjustable from 1-80 seconds) and an alarm recording delay function (adjustable from 0-310 seconds) to ensure the integrity of alarm recording data and convenience Case analysis

The VGA function has a VGA interface and can be connected to a computer monitor. The VGA signal uses a progressive scan function, which effectively eliminates picture interference and flicker, and the picture is clearer and more delicate, which is twice the resolution of ordinary pictures.

PTZ control function Supports PTZ decoders that use RS485 communication with multiple decoding protocols and baud rates, using a remote control to control the PTZ and camera, and can expand a variety of decoding protocols

Communication interface RJ-45 network communication interface

Network features

Network transmission methods include dial-up access, ADSL, ISDN, local area network, metropolitan area network, etc. Support TCP / IP, UDP / IP, FTP / IP network transmission protocol? Network browsing mode adopts IE browser to browse, real-time remote monitoring through the local area network, Real-time playback can remotely record, stop recording, download, control cloud mirror, etc.