Ultrasonic sensors

Ultrasonic sensors are small devices used to detect the presence of intruders and other foreign objects. These can be discreetly placed on patios and inside homes to detect the presence of moving objects outside the environment. They operate on frequencies in the range of twenty-five to forty kilohertz, which is well above the range of human hearing.

The basic mechanism used in ultrasonic sensors activates a quartz crystal that emits ultrasonic sound waves into the surrounding areas. The detector system detects the frequency of the reflected waves to detect any slight changes that may occur due to a moving object known technically as the Doppler effect.

These devices are designed to continuously produce ultrasonic sound waves with no blind spots or gaps in the coverage pattern. This makes it possible to detect small gestures such as hand movement, which can be detected at a distance of 25 feet, arm and body movement at 10 meters, and whole body movement at 12 meters, depending on the type of sensor used. . Advanced ultrasonic proximity sensors used for spy surveillance generate a highly focused ultrasonic sound beam that can easily access tight spaces and openings ranging from 0.5 inches to four inches in diameter.

Some of these devices are equipped with an external touch function that allows the user to remotely program the best scan range for the application. They can also have device lockout functions that prevent unwanted output programming changes. In addition to detecting human movement, they also have the ability to detect any material that can bounce sound, such as liquids and transparent substrates like plastic and glass.

Ultrasonic sensors are also used in different industrial sectors such as pharmaceutical, medical, food, cosmetic and manufacturing for personal and home care. They have allowed the detection of minor flaws in products during the production process, which if left unchecked can damage the brand equity of a product or company.