Many people have had the experience of sitting in a crowded stadium watching a game or a concert, trying to send seconds and photos to a circle of friends throughout the evening to share the scene with them. However, in response to us, there is always a rotating circle. Nobody likes the crowded or bad network situation. Huan. Another way to think about it, bad networks can make people feel at ease to enjoy the wonderful performance moments. However, for industries such as industry or health care, unreliable networks in key Internet of Things systems can lead to catastrophic consequences.
According to Gartner, a technology industry research company, there are 5.5 million new things in the Internet of Things every day, and the total number is expected to reach 20.8 billion by 2020. In response to this explosive growth, establishing reliable wireless connections between these devices is one of the biggest challenges of the Internet of Things. If the communication technology can not achieve reliable connection, the best data acquisition and cloud analysis are also arranged, and even the loss of a connection may cause significant losses. As a major RF technology provider, ADI has been devoting itself to designing robust solutions to meet these communication challenges. The requirement of super-robust system for industrial Internet of Things is not a new challenge. The company's ultra-low power, sub-GHz ISM band radio device ADF7030-1 achieves stable communication chain in industrial Internet of Things applications. The positive role played on the road is an example.
Detailed description of ADF7030-1 RF transceiver
Current wireless connection technologies for consumer electronic devices do not always meet the performance requirements of industrial and health care systems. Different emphasis on security, accuracy and time sensitivity in these systems increases the need for increased reliability. Honeycomb systems are close to this requirement, but are generally not suitable for battery, cost and data throughput requirements. Although today there are extremely reliable systems, these systems are usually not designed with cost as the first consideration. In the industrial Internet of Things, the challenge we face is to achieve the same high-level reliability at a much lower system cost.
ADF7030-1 transceiver is designed with ADI advanced radio technology. It is an ideal choice for users of Internet of Things (IoT) equipment, intelligent metrology, safety and building automation, industrial control and wireless sensor network. ADF7030-1 sub-GHz integrated transceiver supports narrowband and broadband communication. It works in sub-GHz ISM band with data rates ranging from 0.1 Kbps to 300 Kbps and uses 2GFSK modulation. It has stable long range and ultra-low power performance, can achieve stable range in the presence of interference, has extremely high noise figure and blocking performance, and can block more than 100 dB. At the same time, ADF7030-1 has a low-power sleep mode, which can retain all radio configurations with power consumption of only 5nA.
Demonstration of Ultra-Low Power 6 LoWPan Wireless Sensor Using ADF7030-1
ADF7030-1 radio transceiver pays great attention to flexibility and ease of use. It uses on-chip ARM® Cortex® -M0 radio processor to perform radio control and calibration. Its timing control can reduce the time of engineering design and development. Highly programmable packet processing programs can simplify programming interfaces and code development on host microprocessors, thus saving valuable time. ADI has fully tested the product settings, enabling engineers to confidently deploy network settings without spending extra time optimizing settings to maximize performance.
ADF7030-1 EZ KIT Assessment Kit Substrate
ADF7030-1 Helps Solve Three Key Challenges of Wireless Connection
(1) Packet loss due to radio frequency obstruction
The steel structure and thick wall of the factory will cause great obstacles, which may cause the power of radio frequency signal to be reduced to the extent that the target equipment can not receive. Receiver sensitivity of radio devices used in target devices will determine acceptable signal attenuation. The change of sensitivity from low to 2 dB may determine the success or failure of signal reception. Communication system designers must pay close attention to receiver sensitivity when choosing radio devices.
As far as receiver sensitivity is concerned, ADF7030-1 is a very high level radio device in the industry. In many cases, ADF7030-1 can receive radio signals with a power of 3 dB lower than other radio devices. This means that even if the intensity of the signal is less than half of the received power of its competing product, the device can still receive the signal.
(2) Packet loss due to band congestion
Usually, the interconnection device will work in the relevant ISM band in the region. ISM band is license-free band and can be used in various applications requiring wireless connection. Two4 GHz is a globally standardized frequency, widely used in Wi-Fi and Bluetooth® devices. ISM spectrum is also included in the frequency band below 1 GHz. These bands are usually used for Internet of Things applications. In Europe and the United States, the frequency bands are centered at 868 MHz and 915 MHz, respectively. Challenges arise when multiple devices close to each other share the same ISM band. Sending devices may interfere with nearby receiving devices, such as in public hospitals where multiple machines share the same ISM band. The performance of radio devices in such interference environments is measured by blocking specifications. Moreover, this challenge does not come only from devices operating in the ISM band. If congestion capacity is insufficient, mobile phones or tablets working nearby may also result in loss of communication in the system. Therefore, when there are multiple interference sources nearby, such radio devices need to be able to continue receiving messages.
With more than 100 dB of industry-leading blocking data, ADF7030-1 can achieve a very high level of anti-jamming without adding expensive external components. This adds value and ensures normal communication in extremely noisy RF environments.
(3) Performance degradation due to environmental impact
Due to the limitation of the technology used, the performance of radio transceiver will change according to the working environment. Some of these factors include temperature change, voltage reduction caused by battery discharge and chip manufacturing differences between devices. These real events in life may lead to changes in the stability of the equipment. Let's take a look at the emergency response system for event detection used on street lights. The temperature in cold winter may cause the output power of the equipment to change or the sensitivity of the receiver to decline. This may lead to communication interruption under certain conditions. Consumer equipment is rarely used in such extreme conditions, so there is no need to worry too much about this problem, but for emergency response systems, this is unacceptable. In the best case, the cost is the damage to the reputation of the final product and the receipt of maintenance requests for replacement of malfunctioning equipment. Systems designers must ensure that components selected for detection and communication systems remain stable under changing environmental conditions.
Through generations of cooperation with leading industrial manufacturers, ADI has mastered sophisticated methods to cope with the impact of real-life environments on radio transceivers. For example, the output power of the device using ADF7030-1 does not change more than 0 in the whole operating temperature range..2 dB. The realization of this achievement benefits from ADI's unique radio design method. In competing radio products, the corresponding changes are as high as 2 dB.
