One, PC type DVR
The DVR of this architecture uses the traditional PC as the basic hardware, Win98, Win2000, and WinXP (also with a small amount of use of Linux) as the basic software, equipped with image acquisition or image acquisition compression cards, and the preparation of software into a complete system. The PC is a universal platform. The PC's hardware replacement speed is fast. Therefore, the PC-based DVR's product performance is easier to upgrade, and software corrections and upgrades are also more convenient. PC-type DVR can also be subdivided as follows:
(1) IPC PCDVR
Industrial PCDVR adopts industrial control chassis, which can resist the harsh environment and interference of industrial environment. The CPU industrial integrated card and industrial backplane can support more video and audio channels and more IDE hard disks. Of course, the price is two or three times that of a typical commercial PC. It is often used in various important situations and situations where there are many channels.
(2) Commercial PCDVR
Commercial PCDVRs also generally use industrial control chassis to improve the stability and reliability of the system. The use of common commercial PC chassis is also used for the smaller number of audio and video channels. It uses a universal PC motherboard and various boards to meet the system's requirements. It is cheap and adaptable to the environment. It is often used in all kinds of general situations. The number of image channels is generally less than 24 channels.
(3) Server PCDVR
The server PCDVR adopts the chassis and mainboard of the server, and the stability and reliability of the system are greatly improved compared with the former two. It often has a UPS uninterruptible power supply and a massive disk storage array that supports hard disk hot-plugging. It can run continuously for 24 hours x 7 days. It is often used in special applications where the number of monitoring channels is large and the monitoring requirements are very high.
The main problems of PCDVR products are:
Poor stability The DVR software is incompatible with the PC hardware and WINDOWS operating systems and the imperfections of the WINDOWS operating system are very likely to cause the system to crash.
The operation and maintenance of PCDVR products require a certain technical basis, and operating systems sometimes “wash out†some system configurations and software, which makes maintenance difficult.
PCDVR data storage and operating system are in the hard disk, no matter how encrypted, can enter the system from the bottom of the PC, to delete the recorded image files. If the hard disk zero of the PC fails, the entire hard disk or even the entire system will crash. As a result, the reliability of data decreases.
WINDDOWS operating system is very resistant to invasion, once the operating system is destroyed (such as virus intrusion, etc.)
é¾…CDVR can be seriously affected and even the system crashes.
The advantages of PCDVR are:
Large storage space (easy to expand storage hard disk), suitable for long time recording. Audio and video can achieve a large number of ways.
Good man-machine interface and file management, etc., as long as people who have used computers through the mouse and keyboard can operate well;
Software and hardware upgrades are relatively easy and product updates are fast.
Relatively embedded, the network function is more complete.
Full-featured and highly scalable, it can be flexibly configured according to customer needs (such as portrait recognition) to meet the special needs of different industries.
The maintenance cost is relatively low, and the general failure can be repaired by replacing the parts, and the whole machine will not be scrapped.
Second, embedded DVR
It must first understand what an embedded system is. We can define this: Embedded systems generally refer to non-PC systems, devices or devices that have computer functions but are not referred to as computers. It is a micro-dedicated computer system with application-centric, hardware-software-reduced, and strict requirements on functions, reliability, cost, volume, and power consumption. Simply put, the application software and hardware of the embedded system integration system are integrated, which is similar to the working mode of the BIOS in the PC. It has the characteristics of small software code, high automation, and fast response, and is particularly suitable for real-time and multi-task requirements. application.
Embedded DVR is an embedded system based on embedded processor and embedded real-time operating system. It uses a dedicated chip to compress and decompress images. The embedded operating system mainly completes the control and management of the whole machine. Such products do not have so many modules and redundant software functions of PCDVR. They have targeted the stability of software and hardware during design and manufacturing. Therefore, such products are of stable quality and will not cause problems due to crashes. The storage speed, resolution, and picture quality of the video and audio compression stream have greatly improved, and in terms of functionality, it is no worse than the PCDVR.
The realization of various functions of PCDVR depends on various kinds of boards, such as video and audio compression cards, network cards, sound cards, and graphics cards. This type of card-based system is prone to unreliable problems in system assembly, maintenance and transportation. It can not be used in the field of industrial control. It is only suitable for commercial office environments where the reliability is not high. The embedded DVR system is built on the integrated hardware structure. The entire video and audio compression, display, and network functions can all be implemented by a single board, which greatly improves the reliability and stability of the entire system hardware.
The hardware and software design of embedded systems is usually more difficult, but it provides users with the following benefits:
Easy to use, no need for PC operation skills; embedded DVR's operation is usually operated by panel keys or remote control, as long as you will use DVD/VCD and other appliances will use embedded DVR, do not need to learn how to move the mouse, double-click the mouse and other complex computers operating.
The system has high stability, and the software is more fault-tolerant and requires no special management. The embedded DVR adopts an embedded real-time multitasking operating system. Functions such as video surveillance, compression, storage, and network transmission are centralized in a small-sized device. The real-time performance, stability, and reliability of the system are greatly improved. Therefore, no special management is required. For unattended environments;
The software is solidified in FLASH/EPROM and cannot be modified. It has high reliability. PCDVR software is generally installed on the hard disk. The abnormal shutdown of the system may cause the system files to be destroyed or the system hard disk to be damaged. As a result, the entire system may crash and the reliability may be poor. The software embedded in the DVR is hardened in the FLASH/EPROM, and there is no possibility that the system files will be destroyed and the hard disk may be damaged. The reliability is very high.
Using an embedded real-time operating system, the system is turned on and off quickly. The operating systems used by PCDVR, such as Windows and Linux, require a long on/off time due to the relatively large kernel of their operating system. The embedded DVR uses an embedded real-time operating system that can be tailored by the kernel. The kernel can reach a minimum of tens of kilobytes. The loading of the entire system kernel and the initialization of the device can be completed within a few seconds, without the need to protect the system files. Shutdown can be completed in 1 to 2 seconds.
Low hardware and software costs. The embedded DVR adopts an integrated hardware structure and does not need to purchase graphics cards, memory, and other devices like PCDVR, and the hardware cost is lower than that of PCDVR. The software uses a dedicated embedded operating system. Users do not need to pay for this part of the cost (the equipment supplier will include this part of the cost in the development cost). If PCDVR uses a genuine Windows system, this part of the cost will be more than 2,000 yuan if using pirated software. Operating systems, users may also face Microsoft's lawsuits infringing intellectual property rights.
The mechanical size is small and the structure is simple and compact. The hardware embedded in the DVR adopts an integrated design, which is different from the PCDVR card-type structure; the entire system has a simple structure, small size, light weight, and also improves the stability and reliability of the system.
The DVR of this architecture uses the traditional PC as the basic hardware, Win98, Win2000, and WinXP (also with a small amount of use of Linux) as the basic software, equipped with image acquisition or image acquisition compression cards, and the preparation of software into a complete system. The PC is a universal platform. The PC's hardware replacement speed is fast. Therefore, the PC-based DVR's product performance is easier to upgrade, and software corrections and upgrades are also more convenient. PC-type DVR can also be subdivided as follows:
(1) IPC PCDVR
Industrial PCDVR adopts industrial control chassis, which can resist the harsh environment and interference of industrial environment. The CPU industrial integrated card and industrial backplane can support more video and audio channels and more IDE hard disks. Of course, the price is two or three times that of a typical commercial PC. It is often used in various important situations and situations where there are many channels.
(2) Commercial PCDVR
Commercial PCDVRs also generally use industrial control chassis to improve the stability and reliability of the system. The use of common commercial PC chassis is also used for the smaller number of audio and video channels. It uses a universal PC motherboard and various boards to meet the system's requirements. It is cheap and adaptable to the environment. It is often used in all kinds of general situations. The number of image channels is generally less than 24 channels.
(3) Server PCDVR
The server PCDVR adopts the chassis and mainboard of the server, and the stability and reliability of the system are greatly improved compared with the former two. It often has a UPS uninterruptible power supply and a massive disk storage array that supports hard disk hot-plugging. It can run continuously for 24 hours x 7 days. It is often used in special applications where the number of monitoring channels is large and the monitoring requirements are very high.
The main problems of PCDVR products are:
Poor stability The DVR software is incompatible with the PC hardware and WINDOWS operating systems and the imperfections of the WINDOWS operating system are very likely to cause the system to crash.
The operation and maintenance of PCDVR products require a certain technical basis, and operating systems sometimes “wash out†some system configurations and software, which makes maintenance difficult.
PCDVR data storage and operating system are in the hard disk, no matter how encrypted, can enter the system from the bottom of the PC, to delete the recorded image files. If the hard disk zero of the PC fails, the entire hard disk or even the entire system will crash. As a result, the reliability of data decreases.
WINDDOWS operating system is very resistant to invasion, once the operating system is destroyed (such as virus intrusion, etc.)
é¾…CDVR can be seriously affected and even the system crashes.
The advantages of PCDVR are:
Large storage space (easy to expand storage hard disk), suitable for long time recording. Audio and video can achieve a large number of ways.
Good man-machine interface and file management, etc., as long as people who have used computers through the mouse and keyboard can operate well;
Software and hardware upgrades are relatively easy and product updates are fast.
Relatively embedded, the network function is more complete.
Full-featured and highly scalable, it can be flexibly configured according to customer needs (such as portrait recognition) to meet the special needs of different industries.
The maintenance cost is relatively low, and the general failure can be repaired by replacing the parts, and the whole machine will not be scrapped.
Second, embedded DVR
It must first understand what an embedded system is. We can define this: Embedded systems generally refer to non-PC systems, devices or devices that have computer functions but are not referred to as computers. It is a micro-dedicated computer system with application-centric, hardware-software-reduced, and strict requirements on functions, reliability, cost, volume, and power consumption. Simply put, the application software and hardware of the embedded system integration system are integrated, which is similar to the working mode of the BIOS in the PC. It has the characteristics of small software code, high automation, and fast response, and is particularly suitable for real-time and multi-task requirements. application.
Embedded DVR is an embedded system based on embedded processor and embedded real-time operating system. It uses a dedicated chip to compress and decompress images. The embedded operating system mainly completes the control and management of the whole machine. Such products do not have so many modules and redundant software functions of PCDVR. They have targeted the stability of software and hardware during design and manufacturing. Therefore, such products are of stable quality and will not cause problems due to crashes. The storage speed, resolution, and picture quality of the video and audio compression stream have greatly improved, and in terms of functionality, it is no worse than the PCDVR.
The realization of various functions of PCDVR depends on various kinds of boards, such as video and audio compression cards, network cards, sound cards, and graphics cards. This type of card-based system is prone to unreliable problems in system assembly, maintenance and transportation. It can not be used in the field of industrial control. It is only suitable for commercial office environments where the reliability is not high. The embedded DVR system is built on the integrated hardware structure. The entire video and audio compression, display, and network functions can all be implemented by a single board, which greatly improves the reliability and stability of the entire system hardware.
The hardware and software design of embedded systems is usually more difficult, but it provides users with the following benefits:
Easy to use, no need for PC operation skills; embedded DVR's operation is usually operated by panel keys or remote control, as long as you will use DVD/VCD and other appliances will use embedded DVR, do not need to learn how to move the mouse, double-click the mouse and other complex computers operating.
The system has high stability, and the software is more fault-tolerant and requires no special management. The embedded DVR adopts an embedded real-time multitasking operating system. Functions such as video surveillance, compression, storage, and network transmission are centralized in a small-sized device. The real-time performance, stability, and reliability of the system are greatly improved. Therefore, no special management is required. For unattended environments;
The software is solidified in FLASH/EPROM and cannot be modified. It has high reliability. PCDVR software is generally installed on the hard disk. The abnormal shutdown of the system may cause the system files to be destroyed or the system hard disk to be damaged. As a result, the entire system may crash and the reliability may be poor. The software embedded in the DVR is hardened in the FLASH/EPROM, and there is no possibility that the system files will be destroyed and the hard disk may be damaged. The reliability is very high.
Using an embedded real-time operating system, the system is turned on and off quickly. The operating systems used by PCDVR, such as Windows and Linux, require a long on/off time due to the relatively large kernel of their operating system. The embedded DVR uses an embedded real-time operating system that can be tailored by the kernel. The kernel can reach a minimum of tens of kilobytes. The loading of the entire system kernel and the initialization of the device can be completed within a few seconds, without the need to protect the system files. Shutdown can be completed in 1 to 2 seconds.
Low hardware and software costs. The embedded DVR adopts an integrated hardware structure and does not need to purchase graphics cards, memory, and other devices like PCDVR, and the hardware cost is lower than that of PCDVR. The software uses a dedicated embedded operating system. Users do not need to pay for this part of the cost (the equipment supplier will include this part of the cost in the development cost). If PCDVR uses a genuine Windows system, this part of the cost will be more than 2,000 yuan if using pirated software. Operating systems, users may also face Microsoft's lawsuits infringing intellectual property rights.
The mechanical size is small and the structure is simple and compact. The hardware embedded in the DVR adopts an integrated design, which is different from the PCDVR card-type structure; the entire system has a simple structure, small size, light weight, and also improves the stability and reliability of the system.
Made from carbon steel. It's an ideal euqipment to allow easy access to place padlocks when needed.Supplied with 5 padlocks, 10 padlocks, 15 padlocks and 20 padlocks.Can be protable and wall mounted.
Padlock Rack ensure proper storage of safety padlocks for easy accessibility. They provide a great way to organize and centralize lockout activity. These padlock racks are sold without padlocks included.
Padlock Rack
Padlock Rack,Padlock Station Wall Rack
Lockey Safety Products Co., Ltd. , https://www.lotolockey.com