The Hidden Truth About Ultrasonic Measurement: Temperature Matters More Than You Think![Dayu Electronics]

　　Have you heard of ultrasound? It is a sound wave with a frequency higher than 20kHz that not only boasts excellent directionality but also superior penetrating power! Even when propagating through water, ultrasound can travel for miles! This unique characteristic makes ultrasound commonly used in non-contact distance measurement methods to determine the distance of an object. Typically, we use an ultrasonic sensor to transmit the sound wave, which travels in a straight line through the air, is reflected by the object, and is then received back by the sensor as an echo. By measuring the time between transmission and reception, we can accurately determine the distance of the object.

　　But did you know? The measurement accuracy of ultrasound is affected by temperature! Never underestimate this tiny temperature difference—it can cause measurement results to differ by several centimeters! We once conducted an experiment and found that at 30°C, the propagation speed of ultrasound is actually 5 m/s higher than at the normal room temperature of 20°C! This situation significantly reduces the accuracy of measurement results.

　　Therefore, when using ultrasound for measurement, please be sure to pay attention to temperature variations. Generally speaking, our standard measurement temperature range is between -20°C and 60°C, within which the measurement accuracy can reach 0.5%. If this range is exceeded, accuracy will be greatly compromised! So, be sure to provide a suitable temperature environment for your ultrasonic measurements!