All series of ultrasonic sensors have a switch output type. Some products also have 2 switching outputs (such as minimum and maximum level control). Most products offer either analog currents or analog voltage output. Noise suppression, metal knocking, roaring and other noises do not affect the parameter assignment of the ultrasonic sensor, mainly due to the prefer frequency range and the patent noise suppression circuit.
Synchronization function
The synchronization function of the Transducer distance sensor circuit prevents interference. They implement synchronization has the simply respective sync lines. They simultaneously emit sonic pulses, work like a single sensor, and have an extended detection angle.Ultrasonic sensors work alternately. Ultrasonic sensors has ultra-long scanning type, ultrasonic sensors are operating in an alternating manner are independent one another and do not interact with each other. The more sensors that operate in an alternating manner, the lower the switching frequency of the response. The test conditions are that the ultrasonic sensor is particularly suitable for operation in a medium. This sensor can also work in other gaseous media, but requires sensitivity adjustment.
Blind zone
Direct reflection of arduino ultrasonic range finding sensor cannot reliably detect some objects located in the front section of the ultrasonic transducer. Thus, the area between the ultrasonic transducer and the start of the detection range is referred as a dead zone. The sensor must remain unobstructed in this area. 1. Air temperature and humidity, air temperature and humidity will affect the travel time of sound waves. Every 20mm of air temperature is rising, the detection distance increases by at most 3.5%. In the relatively dry air conditions, an increasing in the humidity will result in a maximum increase of 2% in the sound velocity. 2. Air pressure: ±5% of atmospheric changes (selecting a fixed reference point) will result in a ±0.6% change in the detection range. In most cases, the sensor is used at 5 Bar pressure without problems. 3. Airflow, changes in the airflow will affect the speed of sound. However, the effect of airflow speeds up to 10 m/s is negligible. Under the condition that air vortex is more common, for hot metal, it is recommended not to use ultrasonic sensor for detection, because it is very difficult to calculate the echo of the distortion-deformed sound wave. The standard test object is a square acoustic reflector. Used for calibration of rated switch distance.Two-position control can be implemented, such as a pump-in function of a level control system. When an object to be measured moves away from the sensor to the far point of the detection range, the action is output. When the measuring approaches of ultrasonic distance sensor datasheet to the near point by the detection range, the opposite action is output.
Testing the quality of ultrasonic sensors
Ultrasonic range finding sensors are not directly reflected in the direct test with a multimeter. To test the quality of the ultrasonic sensor, an audio oscillating circuit can be used. When C1 is 390OμF, an audio signal of about 1.9 kHz can be generated between the 8th and 10th pins of the inverter. Connecting ultrasonic sensor (transmitting and receiving) to be detected between 8 and 10 feet; if the sensor can emit audio sound, it is basically better to determine than the ultrasonic sensor.
Technology of ultrasonic range distance sensor is applied in the different aspects of production practice, and medical application is one of its most important applications. The application of ultrasonic sensing technology is illustrated by medicine. The application of ultrasound in medicine is mainly to diagnose diseases, and it has become an indispensable diagnostic method in the clinical medicine. The advantages of ultrasonic diagnosis are no pain, no damage to the subject, simple method, clear imaging, high diagnostic accuracy. Therefore, it is easy to promote and is welcomed by medical workers and patients. Ultrasound diagnosis can be based on the different medical principles, a representative of which is the so-called A-type method. This method uses the reflection of ultrasonic waves. When the ultrasonic wave propagates in the human tissue and encounters two media interfaces with different acoustic impedances, a reflected echo is generated at the interface. Each time a reflective surface is encountered, the echo is displayed on the oscilloscope's screen, and the impedance difference between the two interfaces also determines the amplitude of the echo.
Hubei Hannas Tech Co.,Ltd is a professional piezoelectric ceramics and ultrasonic transducer manufacturer, dedicated to ultrasonic technology and industrial applications.
