Transmitting Sound Pressure Level(dB)
-6 dB Directivity (deg)
Allowable Input Voltage(Vp-p)
Operating Temperature (℃)
Storage Temperature (℃)
Metals of case
Ultrasonic sensor 40khz the main performance indicators of ultrasonic sensors 40khz is the core of its plastic jacket or metal jacket in a piezoelectric chip. There are many materials that make up the wafer. The size of the wafer, such as its diameter and thickness, varies, so the performance of each probe is different and we must know its performance before use. The main performance indicators of ultrasonic sensors include:
Ultrasonic sensor 40khz working frequency.
The operating frequency 40khz is the resonant frequency of the piezoelectric wafer. When added to both ends of the AC voltage frequency and the resonant frequency of the chip equal, the maximum output energy, the highest sensitivity.
Ultrasonic sensor 40khz operating temperature.
Due to the Curie point of the piezoelectric material is generally relatively high, especially when the use of diagnostic ultrasound probe less power, so the working temperature is relatively low, you can work long hours without failure. Medical ultrasound sensor 40khz temperature is relatively high, requiring a separate refrigeration equipment.
Ultrasonic sensor 40khz sensitivity.
Mainly depends on the manufacture of the chip itself. Electromechanical coupling coefficient, high sensitivity; the other hand, low sensitivity.
Structure and working principle of ultrasonic sensor 40khz
When the voltage applied to the piezoelectric ceramic, it will produce mechanical deformation with voltage and frequency changes. On the other hand, when vibrating the piezoelectric ceramic, a charge is generated. Using this principle, when a vibrator composed of two pieces of piezoelectric ceramic or a piece of piezoelectric ceramic and a metal piece, so-called bimorph element, is applied with an electrical signal, ultrasonic waves are emitted due to bending vibration. In contrast, when an ultrasonic vibration is applied to a bimorph element, an electrical signal is generated. Based on the above effect, the piezoelectric ceramic can be used as an ultrasonic sensor.
Such as ultrasonic sensors 40khz, a composite vibrator is flexibly fixed to the base. The composite vibrator is a combination of a resonator and a vibrator of a bimorph element consisting of a metal piece and a piezoelectric ceramic piece. The resonator is trumpet-shaped in order to efficiently radiate the ultrasonic wave generated by the vibration and to effectively concentrate the ultrasonic wave at the central portion of the vibrator. Ultrasonic sensors for outdoor use must have good sealing to prevent intrusion of dew, rain and dust. Piezoelectric ceramic is fixed inside the top of the metal case. The base is fixed to the open end of the box body and covered with resin. For industrial robots used in ultrasonic sensors, the accuracy required to reach 1mm, and has strong ultrasonic radiation.
With the bending vibrations of conventional bimorph vibrators, this is not possible at frequencies above 70 kHz. Therefore, in the high-frequency detection, you must use the vertical thickness vibration mode piezoelectric ceramic. In this case, the acoustic impedance of the piezoelectric ceramic matches with the air becomes very important. The piezoelectric ceramic had an acoustic impedance of 2.6 × 107 kg / m2s, while the air had an acoustic impedance of 4.3 × 102 kg / m2s. A difference of 5 power leads to a large loss on the surface of the piezoelectric ceramic vibrating radiation. A special material adheres to the piezoelectric ceramic as an acoustic matching layer to match the acoustic impedance of air. This structure allows the ultrasonic sensor to operate normally up to hundreds of kHz.
Ultrasonic distance sensor technology principle and application
Ultrasonic distance sensor can be widely used in the level (level) monitoring, robot collision avoidance, a variety of ultrasonic proximity switches, and burglar alarm and other related fields, reliable work, easy installation, waterproof, launch angle is small, high sensitivity, Convenient and industrial display instrument connection, but also provide a larger angle of the probe launch.
Ultrasonic range finder: ultra-high-energy acoustic ranging technology has made a major breakthrough in ultrasonic ranging technology, which not only broaden the application of ultrasonic ranging technology (for extremely harsh working conditions), and the use of intelligent adjustment technology, Greatly improving the reliability of ultrasonic products and performance indicators, allowing users no worries.
Excellent echo processing technology, ultra-high frequency of 5-50KHZ frequency so that the maximum range of the level gauge up to 120 meters, the applicable medium temperature -20 ℃ - +175 ℃. Intelligent fully automatic adjustment of the wave frequency, automatic temperature compensation function makes its work more stable and reliable. HpAWK series products also have a flexible way of working (power supply can be 12VDC, 24VDC, 110VAC, 220VAC; two / three / four wire system can be freely combined in the same instrument. It also has advanced remote GSM, CDMA, Internet debugging Function, making the user ready to receive technical support.
Through the above description of the ultrasonic sensor design, structure and application of the introduction.
Ultrasonic sensor 40KHZ customized.