Touch advertising machine is also called touch Android advertising machine and touch screen display. It is a touch all-in-one machine that integrates flashing, processing, and interface. It is widely used in the industrial field. The machine base equipment mainly includes three parts: motherboard, CPU, interface equipment, etc. , And the motherboard is particularly important. Do you know how to select equipment? The editor of the touch machine manufacturer tells us how we select equipment:
First of all, let's start with the development of the motherboard. The development of a new motherboard usually involves the process of resuming the principle scheme, circuit wiring (EDA, electronic scheme automation), writing BIOS (basic input output system) and driver software, manufacturing prototypes, scheme certification, and small batch trial production.
The level of development of a motherboard plays a selective role, especially the principle scheme, circuit wiring, and the skill level of BIOS writing. The so-called Rome is not built in a day. At least three to five years, as many as more than ten years of well-experienced R & D team programs. Senior principle program engineer, can show his skill in the selection of program program, circuit program, key component parameters and manufacturer's selection. In order to find the cost, some manufacturers will start from the aspect of the scheme, such as changing the three-phase power supply circuit of the CPU to two-phase, which will reduce the cost, but it puts the risk of burning MOS tubes rather than CPUs.
Another example is to choose some cheaper components. Take capacitors as an example. The most expensive ones produced in Japan, but their withstand voltage and heat resistance are also better, because the CPU power supply circuit has high requirements for the capacitor’s withstand voltage and heat resistance. Large manufacturers usually choose capacitors of better quality, such as the capacitors of NICHICON or RUBYCON from Japan. It is assumed that the selection of capacitors of poor quality is likely to cause active aging after a long period of operation in a higher temperature operating environment. In severe cases, the capacitors may be Was burned.
For another example, both internationally and domestically, there are strong requirements for electromagnetic compatibility. The national standard GB9254 has clear rules on electromagnetic radiation, and it is divided into two levels: A (industrial) and B (civilian). Especially the civil standards are more severe, because it will directly affect the health of the users and the surrounding population. We did a small experiment and placed a pot of cactus bonsai next to a CRT flashing screen with strong radiation for two to three months. Growing up in the desert, the cactus with strong vitality was actually dry. How do you know if the goods you buy meet international or national standards? You can ask the manufacturer to issue a verification certificate from a national authority, or CE certification in Europe, or FCC certification in the United States.
In order to ensure that electromagnetic radiation meets the standards, many large factories will invest in the establishment of laboratories, first inspect them by themselves and then send them to authoritative organizations for certification. Just creating a half-wave anechoic chamber for measuring electromagnetic radiation requires investment of nearly 10 million yuan in equipment. The motherboard scheme, wiring and components will all have a direct impact on electromagnetic radiation. For example, a senior EDA engineer not only needs to understand the high-frequency and low-frequency wiring schemes to prevent crosstalk, but also think about the right angle of the wiring. For electromagnetic radiation, a hardware engineer assumes that when selecting certain components, such as magnetic bead components, thinking about reducing costs or having a history is not good, it will also constitute electromagnetic radiation.
How to check the function, compatibility and reliability of the motherboard? These tasks are usually completed by the development team's program certification. In comparison, the function inspection is simpler. It can be inspected by setting up the inspection table with simple equipment such as CPU, memory stick, hard disk, and power supply. The key is to carefully inspect each function item by item. The compatibility check is a lot messier. Checking that the motherboard is compatible with mainstream operating systems, job application software, and equipment that are popular on the market is indeed an operation that requires a lot of money, manpower, and time.
Take Lenovo's products as an example. To complete this task, more than 300 inspections are required. This is indeed an inspection of the company's strength. Another task to check the function and compatibility is signal analysis. After the instrument, analyze whether the output signal of each circuit module meets the standard. This requires the manufacturer to have many years of signal analysis skills to accumulate. This step is the key to the success or failure of the motherboard solution. However, the instruments that need to be purchased for signal analysis, such as oscilloscopes that span 1G frequency, cost hundreds of thousands of dollars each, and most of the engineers who have strong signal analysis skills are working in some large companies in the industry. For industrial users, nothing is more concerned than the reliability of the motherboard. Reliability inspection includes high temperature inspection, low temperature inspection, humidity inspection, vibration inspection, drop inspection, anti-static inspection and lightning strike inspection.
Another key point of the motherboard solution is the preparation of the BIOS. Many motherboard compatibility issues are related to the BIOS. Some BIOS masters can even modify the BIOS to compensate for the shortage of commodity hardware solutions. When the motherboard has compatibility problems, modifying the BIOS is better than modifying the hardware. The plan is much simpler. The use of BIOS can also make many innovations. For example, the early motherboard requires the user to manually set the jumper according to the CPU frequency, which adds a lot of difficulty to the user. In 1995, Lenovo first introduced the SpeedEasy technology in the industry and applied for a patent in the United States. Since then, the history of motherboards requiring CPU jumpers to be set has been completed.
At present, Lenovo has 12 Easy skills. Among them, the most worth mentioning is Recovery Easy skills, commonly known as "one-key recovery" skills. After a simple setting, when the computer is improperly used or is damaged by a virus, the user Just press the recovery button to recover the system to the factory condition, which greatly reduces the manpower and material resources that the manufacturer spends to modify the user system. It is especially useful for users of industrial computers.
It can be seen that the R&D strength of a company is primarily manifested in the strength of the R&D team and the investment in R&D funds. The R&D team of a large factory usually exceeds 100 people, and the annual R&D investment exceeds 10 million. Many businesses will advertise how strong their research and development capabilities are. For users, the simplest way is to look at the time of establishment of their company, the history and number of R&D teams, and the amount of R&D funds invested.
