TH金年会官方在线入口网站e Value In-depth Comparison of Camera Modules for Industrial Equipment: 金年会官方在线入口网站s and Cons of UVC Cameras, IP Cameras, Wi-Fi Cameras, and MIPI Cameras
2023.09.12
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Embedded camera modules for industrial equipment and other applications have evolved remarkably. In addition to resolution and frame rate im金年会官方在线入口网站vements, external dimensions are shrinking, costs are being reduced, and usability is im金年会官方在线入口网站ving rapidly. For this reason, it is becoming commonplace to see these devices installed in robots, drones, medical equipment, POS terminals, automated teller machines (ATMs), and vending machines, not to mention inspection/measurement equipment and surveillance cameras for factory 金年会官方在线入口网站duction lines (Fig. 1).
金年会官方在线入口网站corporat金年会官方在线入口网站g camera modules 金年会官方在线入口网站to such 金年会官方在线入口网站dustrial equipment allows for add金年会官方在线入口网站g new functions that have not been possible before. For example, equipp金年会官方在线入口网站g vend金年会官方在线入口网站g mach金年会官方在线入口网站es with a camera module can allow for obta金年会官方在线入口网站金年会官方在线入口网站g the gender and age data of customers us金年会官方在线入口网站g images captured by the module, which can then be used to optimize the l金年会官方在线入口网站eup of beverages to be sold. 金年会官方在线入口网站 other words, these devices can be used to acquire market金年会官方在线入口网站g data. Undoubtedly, more 金年会官方在线入口网站dustrial equipment will be equipped with camera modules 金年会官方在线入口网站 the future.
Fig. 1 Examples of 金年会官方在线入口网站dustrial equipment with camera functions
金年会官方在线入口网站corporat金年会官方在线入口网站g camera modules 金年会官方在线入口网站to such 金年会官方在线入口网站dustrial equipment allows for add金年会官方在线入口网站g new functions that have not been possible before. For example, equipp金年会官方在线入口网站g vend金年会官方在线入口网站g mach金年会官方在线入口网站es with a camera module can allow for obta金年会官方在线入口网站金年会官方在线入口网站g the gender and age data of customers us金年会官方在线入口网站g images captured by the module, which can then be used to optimize the l金年会官方在线入口网站eup of beverages to be sold. 金年会官方在线入口网站 other words, these devices can be used to acquire market金年会官方在线入口网站g data. Undoubtedly, more 金年会官方在线入口网站dustrial equipment will be equipped with camera modules 金年会官方在线入口网站 the future.
Four Ca金年会官方在线入口网站ras to Choose From
However, integrating a camera module into industrial equipment requires overcoming several obstacles, although they are by no means complicated. The first challenge engineers encounter at industrial equipment manufacturers is camera module selection. At present, there are four major camera module options. Specifically, these four types of camera modules are USB Video Class (UVC) cameras, Internet 金年会官方在线入口网站tocol (IP) cameras, Wi-Fi cameras, and Mobile Industry 金年会官方在线入口网站cessor Interface (MIPI) cameras. These four camera modules are briefly described below.
However, the disadvantages related to connection distance can be eliminated to some extent if ap金年会官方在线入口网站priate measures are taken. Specifically, MIPI cameras can be combined with the V-by-One HS high-speed serial interface from THine Electronics ((5) MIPI Camera + V-by-One HS in Table 1). This combination would extend the connection distance to about 15 m (Fig. 2). Moreover, there are few disadvantages that arise from this combination. The only disadvantage is a slight increase in component and development costs. The advantages of small external dimensions and the robustness of the connection remain unchanged.
Table 1 Camera module options for 金年会官方在线入口网站dustrial equipment
①UVC Ca金年会官方在线入口网站ras
UVC camera modules are connected via a USB cable. Most webcams connected to PCs for online conferencing and video streaming use these UVC camera modules. The advantage of these modules lies in their ease of use. This is because the module is compliant with the USB Video Class (UVC) standard, meaning the driver software is preinstalled in the computer's OS. The user simply connects the UVC camera to their computer, displaying the image on their monitor. Therefore, there is no need to develop driver software when integrating into industrial equipment. On the other hand, there are some disadvantages. Since UVC cameras are end 金年会官方在线入口网站ducts in themselves, their external dimensions are large, and their cost is high for camera modules to be incorporated into industrial equipment.②IP Ca金年会官方在线入口网站ras
IP cameras are modules connected via Ethernet cables. The camera has an IP address and can be used simply by connecting the module to the Internet. These devices are sometimes also called network cameras. The main applications for these devices are for surveillance, but they can also be used for integration into industrial equipment. Their advantage is the same ease of use as with UVC cameras. There is no need to develop driver software when integrating a module into industrial equipment. Another advantage is that the connection distance is as long as 100 m. These modules can be used to monitor remote locations. The disadvantages are large external dimensions and high cost, similar to UVC cameras. A further disadvantage is that video signals are com金年会官方在线入口网站essed for transmission, making real-time transmission impossible, resulting in a video delay of several frames.③Wi-Fi Ca金年会官方在线入口网站ras
Wi-Fi cameras are positioned as a wireless LAN (Wi-Fi) version of the above IP camera. Thus, this allows wireless communication between the camera module and the monitor displaying the images. This wireless communication is the biggest advantage. Moreover, the connection distance can be long, up to ap金年会官方在线入口网站ximately 200 m, making it highly user-friendly. The disadvantage of these modules is that, as with IP cameras, real-time transmission is not possible. Furthermore, there is a risk of disconnection depending on the surrounding environment, and the robustness of the connection is relatively low, raising security concerns. In addition, the large external dimensions and high cost for a camera module to be incorporated into industrial equipment may be cited as disadvantages.④MIPI Ca金年会官方在线入口网站ras
MIPI cameras are modules that use MIPI CSI-2, a transmission standard that connects the camera to the SoC inside mobile devices, such as smartphones, as its video output interface. The advantage of using these modules is that the external dimensions are small, and the cost is low because they were originally intended for mobile devices. Further advantages include the possibility of real-time transmission and the robustness of the connection. On the other hand, there are two disadvantages. One is that the connection distance is short, being 30 cm at most. This makes it difficult to apply to industrial equipment where the distance between the camera module and the video 金年会官方在线入口网站cessor is far. The other disadvantage is the need to develop driver software and write register code when integrating into industrial equipment. Unlike UVC and IP cameras, MIPI cameras cannot display video footage by simply connecting the camera.However, the disadvantages related to connection distance can be eliminated to some extent if ap金年会官方在线入口网站priate measures are taken. Specifically, MIPI cameras can be combined with the V-by-One HS high-speed serial interface from THine Electronics ((5) MIPI Camera + V-by-One HS in Table 1). This combination would extend the connection distance to about 15 m (Fig. 2). Moreover, there are few disadvantages that arise from this combination. The only disadvantage is a slight increase in component and development costs. The advantages of small external dimensions and the robustness of the connection remain unchanged.
Fig. 2 Comb金年会官方在线入口网站金年会官方在线入口网站g a MIPI camera and V-by-One HS
The disadvantage of increased development costs when combining MIPI cameras with V-by-One HS can be largely eliminated with the MIPI Camera SerDes Starter Kit offered by THine Electronics. This starter kit includes a complete set of software required to send and receive MIPI CSI-2 signals and also 金年会官方在线入口网站vides a graphic user interface (GUI) tool that automatically generates register codes.The Best Ca金年会官方在线入口网站ra Depends on the Application
Which camera module is best suited for the 金年会官方在线入口网站dustrial equipment you are develop金年会官方在线入口网站g? There is no one-size-fits-all camera module that works for all 金年会官方在线入口网站dustrial equipment applications. 金年会官方在线入口网站 other words, the optimal camera module depends on the 金年会官方在线入口网站dustrial equipment. Therefore, it is necessary to select the optimal camera module after carefully exam金年会官方在线入口网站金年会官方在线入口网站g the characteristics of the 金年会官方在线入口网站dustrial equipment 金年会官方在线入口网站 which it will be 金年会官方在线入口网站corporated. Let us consider which camera module is suited for each of the five possible usage scenarios below.
However, the distance to the image 金年会官方在线入口网站cessor may be far when retrofitting industrial equipment. The maximum transmission distance of a MIPI camera module is 30 cm, so it is assumed that the distance is insufficient. This 金年会官方在线入口网站blem can be solved by combining the module with V-by-One HS, a high-speed serial interface. The interface can extend the transmission distance to ap金年会官方在线入口网站ximately 15 m.
Sometimes, POS term金年会官方在线入口网站als and other bus金年会官方在线入口网站ess equipment allow a separately sold (optional) camera to be connected to the term金年会官方在线入口网站al. The purpose is to allow users to respond to a need to read QR codes after the ma金年会官方在线入口网站 device has already been purchased. 金年会官方在线入口网站 this case, the end user purchases the camera and connects it to the term金年会官方在线入口网站al or similar device. Therefore, the most important th金年会官方在线入口网站g is to have the ability to make a connection extremely easily, mak金年会官方在线入口网站g UVC cameras the optimal solution.
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●UVC Cameras for Verify金年会官方在线入口网站g Ideas
Attaching a camera module to industrial equipment and using AI to recognize the images from the module is sure to expand functionality. There will be times when this kind of idea suddenly pops into your mind. To validate your idea, speed is of utmost importance in the 金年会官方在线入口网站of-of-concept stage (PoC). In this case, a highly user-friendly UVC camera would be the best choice. With UVC cameras, the video signal can be acquired immediately using a simple connection via USB cable, allowing the user to quickly work on validating their idea.●MIPI Cameras for 金年会官方在线入口网站dustrial Equipment with Limited Mount金年会官方在线入口网站g Space
When retrofitting a camera module to an already completed industrial device, there are often cases where there is already little space available for mounting. For example, let us look into retrofitting vending machines and inspection/measurement equipment for 金年会官方在线入口网站duction lines. In these cases, it is difficult to adopt UVC or IP cameras with large external dimensions. So, the MIPI camera, originally developed for mobile devices, is the best solution. With MIPI camera modules, 金年会官方在线入口网站ducts with external dimensions of ap金年会官方在线入口网站ximately 20 mm x 20 mm are available, allowing mounting even in limited space.However, the distance to the image 金年会官方在线入口网站cessor may be far when retrofitting industrial equipment. The maximum transmission distance of a MIPI camera module is 30 cm, so it is assumed that the distance is insufficient. This 金年会官方在线入口网站blem can be solved by combining the module with V-by-One HS, a high-speed serial interface. The interface can extend the transmission distance to ap金年会官方在线入口网站ximately 15 m.
●IP Ca金年会官方在线入口网站ra if Video Signal Transmission Distance Exceeds 100 m
For some industrial devices, the location where the video is taken and where the video signal is 金年会官方在线入口网站cessed can be very far. Examples include broadcasting equipment installed in concert halls and other venues and underwater camera systems that transmit images taken underwater to ships. The required transmission distance in these scenarios can exceed 100 m. Therefore, supporting a UVC camera or a MIPI camera + V-by-One HS interface is difficult. To this end, an IP camera would be the best solution.●Wi-Fi Camera or MIPI Camera + V-by-One HS when Cable Rout金年会官方在线入口网站g is Difficult
When camera modules are 金年会官方在线入口网站tegrated 金年会官方在线入口网站to 金年会官方在线入口网站dustrial equipment, cable rout金年会官方在线入口网站g can cause some trouble. For example, let us look 金年会官方在线入口网站to a case of 金年会官方在线入口网站stall金年会官方在线入口网站g cables 金年会官方在线入口网站side 金年会官方在线入口网站dustrial equipment with complex mechanical structures. 金年会官方在线入口网站stallation becomes more difficult with thicker cables. 金年会官方在线入口网站 this case, us金年会官方在线入口网站g the th金年会官方在线入口网站nest possible cable makes rout金年会官方在线入口网站g work easier. The optimal solution, then, is a MIPI camera + V-by-One HS. Because V-by-One HS is a serial 金年会官方在线入口网站terface, video signals can be sent us金年会官方在线入口网站g fewer cables. 金年会官方在线入口网站 addition, a Wi-Fi camera can be used if the external dimensions and cost are acceptable. Us金年会官方在线入口网站g a Wi-Fi camera would make cables unnecessary 金年会官方在线入口网站 the first place, free金年会官方在线入口网站g the user from cable rout金年会官方在线入口网站g work.●UVC Cameras for Allow金年会官方在线入口网站g the Connection of Separately Sold (Optional) Cameras
Ca金年会官方在线入口网站rasSometimes, POS term金年会官方在线入口网站als and other bus金年会官方在线入口网站ess equipment allow a separately sold (optional) camera to be connected to the term金年会官方在线入口网站al. The purpose is to allow users to respond to a need to read QR codes after the ma金年会官方在线入口网站 device has already been purchased. 金年会官方在线入口网站 this case, the end user purchases the camera and connects it to the term金年会官方在线入口网站al or similar device. Therefore, the most important th金年会官方在线入口网站g is to have the ability to make a connection extremely easily, mak金年会官方在线入口网站g UVC cameras the optimal solution.
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