In the service of the site and measurement of air ultrasonic thermometer

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ultrasonic ranging is mainly used in reverse to remind, construction sites, industrial site of distance measurement, while current distance measuring range can reach hundreds of meters, but the precision of measuring is often only reach cm orders of magnitude.

ultrasonic ranging principle is to use the ultrasonic velocity in air is known, to measure sound waves reflected time after launch to meet obstacles, according to the transmitting and receiving time to calculate the launch point to the actual distance of obstacles. Due to the intensity of ultrasonic beam transmission, good directivity, easily easy to control, and measurement objects do not need to direct contact with the advantages of is as an ideal means of liquid level measurement.

arbitrary point on the lower limit set, pour the value set, ( But the distance between two points within the range set arbitrary corresponding 4 & ndash; 20 ma, or 0 & ndash; 5 v, sensors can be convenient installation and debugging, to adapt to a variety of signal connection requirements) 。 Distance online calibration accuracy and can be used for water, wine, sugar, beverage and so on have a 4 - level control output way - Ma, or 0 to 20 5 v output, 0 & ndash; 10 v output, including upper and lower can make the liquid level and the level set function to realize automatic control and alarm. Distance or depth data directly by the LED digital tube display, convenient for field testing, and with a temperature display. Measurement error range of 0. 5% ( In the air) 。

ultrasonic transmission speed is influenced by the density of the air, the higher the density of air the speed of the ultrasonic is faster, and the density of air and has close relation with the temperature in the transmission of ultrasonic velocity is the premise of accurate, propagation time difference measuring distance as long as the reach microsecond precision, can guarantee the ranging error of less than 1 mm. For details on web: WWW. 517席。 com/