Knock sensor is used to detect the engine engine block deflagration strength. Once the deflagration occurs, the ECU is instructed to delay the ignition and turn to the closed timing control of the ignition timing in order to adjust the ignition timing.Installed in the cylinder on the specific detect

Progress of Underwater Acoustic TransducerSince the 1960s, in order to achieve the sonar remote detection, the development of a number of new materials, structural vibration and energy conversion mechanism; the development of the work in low-frequency, broadband, high power and deep water transmitte

With the deepening of marine development, the related technologies for underwater exploration have been paid more and more attention. The key technologies of underwater acoustic detection are underwater acoustic transducer and signal processing. Underwater acoustic remote control system framework, a

Ultrasonic distance meter is mainly measured by the speed of sound, the naked eye can not see the injection line. There is a pointing device on the device. When the instrument is aimed at the target to be measured, it will appear on the display screen of the ultrasonic distance meter.Ultrasonic wave

Ultrasonic fish finder device uses the ultrasonic cavitation effect to produce lethality, ultrasonic action in the liquid can produce a large number of small bubbles. The utility model relates to an ultrasonic fishing machine, which is used for controlling the transmission and driving circuit, and a

Ultrasonic thickness measurement instrument is based on the principle of ultrasonic pulse reflection for thickness measurement, when the probe transmitted ultrasonic pulses through the material object to be tested interface, the pulse is reflected back to the probe through the accurately measuring o

Ultrasonic flaw detection is a method that can penetrate into the depths of the metal material by ultrasonic, and when it from a cross-section into another section, the edge of the interface characteristics of reflection will check the parts of a defect, when the ultrasonic beam from the part surfac

Ultrasonic flaw detection is a method that can penetrate into the depths of the metal material by ultrasonic, and when it from a cross-section into another section, the edge of the interface characteristics of reflection will check the parts of a defect, when the ultrasonic beam from the part surfac

A piezoelectric sensor converts a physical parameter, such as acceleration or pressure, into an electrical signal. In some sensors the physical parameter acts directly on the piezoelectric element; in other devices an acoustical signal establishes vibrations in the element and the vibrations are, in