Intelligent passive sensing redefines measurement possibilities

Intelligent passive sensing redefines measurement possibilities

Increasing reliance on advanced technologies and the Internet of Things (IoT) is driving the need for sensors that can be easily deployed in small quantities to large quantities and provide low expansion costs and no maintenance.

Advances in technology have made it possible to interconnect many different types of devices. What started with smartphones has evolved into a network of thermostats, appliances, vehicles and other devices known as the Internet of Things (IoT). The Internet of Things consists of many devices transmitting data through various interfaces, with wireless cloud interfaces being the most common. As the number of connected devices continues to grow, so does the need for data.

Data is generated from many sources, and electrical sensorsRonics are often used to collect data from connected devices. A sensor is a device that converts physical or environmental characteristics such as temperature and humidity into electrical signals.

Demand for data is driving market growth for different types of sensors, such as temperature, humidity, pressure and distance sensors, which provide the data necessary for the system to work. Electronic sensors will become increasingly ubiquitous as the Internet of Things processes data from different sources with unprecedented power. According to a study by Markets and Markets, the global sensor market is expected to exceed US$38 billion in 2022. The need to acquire more sensor data from more locations will drive the development of new, more advanced sensors. small,consuming less energy and less expensive, and more affordable. easy to deploy in large quantities and in small spaces.

Structure of the electronic sensor

Traditional electronic sensors contain the same functional modules, regardless of their design. The central sensor module is the actual sensing element. The sensitive element is the part of the sensor that responds to the sensor\'s environment and converts the environmental conditions into electrical parameters. In addition to the sensing element, the sensor also requires power for the electronic components and data processing and interconnection circuits inside the sensor. Most electronic sensors include a sensing element, a power module, and a data processing module located at each sensing node. As more sensing data is needed, the costt required to scale to multiple sensor nodes becomes an obstacle for some applications. The physical size of components required for sensor power and communication modules limits the use of small sensors, while battery-powered sensors involve maintenance and environmental issues that also limit sensor deployment in some applications. The cost and size of traditional electronic sensors limit the expansion of sensor networks or the deployment of multi-sensor systems or disposable sensors for intelligent sensing, hindering the further development of the Internet of Things.

Typical applications

Low-cost passive or disposable sensors can enable large applications where volume is an important advantage . For example, monitoring temperatures at multiple locations in a data center server racked or at a high-power circuit breaker connection in an industrial power switch, temperature trends can be monitored and abnormally high temperatures can be quickly detected for preventative maintenance or corrective action. . Intelligent passive sensors attach directly to components such as metal enclosures, device housings or heat sinks and respond to periodic polling from readers in all radio frequency ranges of the sensors.

Other applications include water leak testing in the automotive industry: a set of intelligent passive sensors can be installed quickly and efficiently in the car before the start of water leak testing, eliminating the need for laborious testing. manual detection while simplifying data collection and analysis.

In addition, humidity detectiontee and pressure and additional distance sensing to detect the status of car seat belts can enable smarter cars than traditional wired systems or seat-integrated airbags. Occupancy detection. Intelligent passive sensors can distinguish between human bodies and objects placed on seats, making detection easily extendable to rear passenger seats and removable seats at little additional cost.

In many applications ranging from home automation and connected cars to industrial control, quality inspection, agriculture, medical, construction, supply chain management, etc., smart passive sensor tags can also perform many tasks. Other water leak detection, occupancy detection and temperature or humidity level monitoring.

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