Leveraging the high-expansion RTOS environment, wearable medical equipment development is comprehensive
One day, wearable portable medical devices will be everywhere in our daily lives. In fact, we will not regard them as "equipment", but rather care about the various services they provide. With the continuous development of wireless connectivity and the shift of the medical industry to the outpatient service model, equipment developers will be able to usher in a real era if they can anticipate future needs and make full use of them.
Of course, equipment developers must meet very stringent manufacturing requirements. Wearable medical devices must be small in size, able to stay connected, have long battery life, and provide more computing resources. Market competition is becoming more complex and increasingly fierce, and equipment developers must survive in such markets. To achieve this goal, equipment developers must build a fast, flexible, lightweight, and cost-effective platform (Figure 1).
Figure 1 The software platform must cover all non-application specific code
Difference between two wearable medical devices
Wearable medical devices fall into two broad categories: disposable wearables and reusable wearables. Disposable wearable devices are relatively new market segments, and their development is relatively fast due to their relatively short product life. In contrast, reusable equipment requires longer product life and higher safety, as well as a high reliability factor.
The mode that drives the development of disposable devices is thin and high yield. To achieve this goal, disposable devices must provide the most features of the processor with the most limited resources. In order to significantly increase revenue, equipment developers often provide a range of products for the end-user community, in exchange for price, and the efficiency of writing applications for each function of the product is not efficient. Therefore, you must build a common software environment that supports both single applications and seamless migration between computing resources. Such environments must be able to compress to the most streamlined systems, they typically provide little memory resources, but can scale to support richer features.
The reusable equipment market presents a range of different challenges to equipment developers. The main added value that equipment manufacturers provide to the market is that the processor used by the end customer is no longer temporary. The equipment lifecycle supported by semiconductor vendors varies widely. Customers in the medical industry typically do not want product replacement cycles of up to ten years or more. To eliminate this conflict and maintain the necessary application code lifecycle to stay profitable, design a stable application programming interface (API) instead of a specific processor.
Decrypt the wearable device connection type
The difference between current devices and previous devices is whether they provide global connectivity—including direct connection to the Internet or the cloud, or to a local intermediary device (the wearable medical device is paired with the user's smartphone), and then connected to the Internet through an intermediary device. . This connection may be intermittent (using a wireless connection or a temporary wired connection) or it may be continuous (using a wireless option).
Wired options are the lowest cost connection, but they are the least flexible. However, for low-cost devices, they are still a viable solution. When connected to another device provided by the wearable system vendor via a wired link, extremely simple connection methods such as Serial Peripheral Interface (SPI) and Internal Integrated Circuit (I2C) can be used. Conversely, when connecting to a general-purpose computing device, you need to use a more open standard, such as USB. Engineers who have used these different connection methods know that the protocol complexity of USB and other simple connection methods is far different. Connection options are likely to change over the life of the device, even during the development cycle. The operating environment should be able to isolate the application layer from the underlying connection method most effectively.
However, the trend in future wearable medical devices is to use wireless connectivity. Although USB is a more complex protocol than SPI, the various wireless connectivity options are far more complex than USB, especially when security is involved. Wireless connection methods include Near Field Communication (NFC), Bluetooth/Bluetooth Low Power (BLE), Wi-Fi, and ZigBee (Fig. 2). Technology, protocols, and options are changing rapidly in these wireless connections. More importantly, the cost of these systems will also change, although at present they seem to be too expensive, but in the future it is likely to become an affordable standard, and application layer code can maintain a long life cycle.
Figure 2 Wireless connectivity options are varied and constantly changing.
The Real-Time Operating System (RTOS) environment with SPI Level Interface is currently available in the most streamlined devices and enables seamless migration (whether the entire product line or product lifecycle), which undoubtedly enables wearable medical device raw devices Manufacturers (OEM) manufacturers adapt to any situation that may arise.
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