Apple's new technology: ultrasonic temperature sensor to improve environmental temperature monitoring in real time

Apple recently submitted a patent application for a new ultrasonic temperature sensor to the U.S. Patent Office. The sensor can not only measure the temperature of the air around the user, but can also detect the temperature of other environmental media such as water, liquids or materials such as glass. The application potential of this technology is very wide, it will provide users with more temperature information and may play an important role in various fields.

According to Apple’s description in the patent document, users need to know real-time temperature information of their environment during daily activities, such as walking, commuting and exercising. Although existing electronic devices can obtain weather and temperature data over the Internet, these data often do not accurately reflect the actual conditions at the user's location, such as being affected by shady areas or different surface materials. Therefore, Apple proposes to integrate ultrasonic temperature sensors directly into electronic devices to provide more accurate ambient temperature measurements. This solution will allow users to better understand the temperature of their surroundings and make adjustments accordingly as needed.

It is understood that the key to this new patent is the use of ultrasonic technology to directly measure the ambient temperature. The sensor determines temperature by calculating how fast sound travels through air or other media, providing accurate real-time data. Sensors can be flexibly placed in recesses or openings in electronic devices and equipped with grids or grilles as needed. The sensor design can include multiple transmitters and receivers, such as a PMUT array, or it can use separate ultrasonic transmitters and receivers, or even use a PMUT with both transmit and receive functions.

The patent document also shows the potential application scenarios of the temperature sensor, including but not limited to installation on devices such as Apple Watch and iPhone. In addition, the patent drawing also explains in detail the working principle of the sensor, the relationship between temperature and sound speed, the influence of air density and atmospheric pressure on altitude, and the structure of the piezoelectric micromachined ultrasonic transducer array. This information provides valuable reference and guidance for further development and application of this temperature sensor.

If this patent is successfully applied, Apple's innovative technology will greatly improve the environmental sensing capabilities of electronic devices to provide more accurate and practical temperature information, thereby further improving the user experience.

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