Piezo Ignitor

Electronic Piezo Ignitor (piezoelectric ceramic flint)

When you press the button, the gas stove immediately ignites a blue flame. Have you ever realized what brings you this convenience?

Connect a piece of plain-looking ceramic to the wire and the ammeter, and press it with your hand, and the pointer of the ammeter will also oscillate-an electric current is actually generated. Isn’t it a weird thing? In fact, this is piezoelectric ceramics, a functional ceramic material that can convert mechanical energy and electrical energy. What kind of material is piezoelectric ceramics?

This is a material with piezoelectric effect. The so-called piezoelectric effect refers to the deformation of some medium under the action of force, which causes the surface of the medium to be charged. This is the positive piezoelectric effect. On the contrary, when an excitation electric field is applied, the medium will produce mechanical deformation, which is called the inverse piezoelectric effect. This wonderful effect has been applied by scientists in many fields closely related to people’s lives to realize functions such as energy conversion, sensing, driving, and frequency control.

In terms of energy conversion, using the characteristics of piezoelectric ceramics to convert external force into electrical energy, piezoelectric igniters, mobile X-ray power supplies, and shell detonating devices can be manufactured. There are flints made of piezoelectric ceramics in electronic lighters, and the number of ignitions can be more than 1 million. Using piezoelectric ceramics to convert electrical energy into ultrasonic vibrations can be used to find the position and shape of underwater fish, non-destructive testing of metals, ultrasonic cleaning, ultrasonic medical treatment, and various ultrasonic cutters, welding devices and Soldering iron, processing plastic and even metal.

Piezoelectric ceramics have sensitive characteristics and can convert extremely weak mechanical vibrations into electrical signals, which can be used in sonar systems, weather detection, telemetry, environmental protection, household appliances, etc. Earthquakes are devastating disasters, and the source of the earthquake is deep in the earth’s crust. It was difficult to predict before, leaving human beings in an embarrassing situation where they can do nothing. Piezoelectric ceramics are sensitive to external forces so that it can even sense the disturbance of the air caused by flying insects flapping their wings more than ten meters away. Using it to make piezoelectric seismometers can accurately measure the intensity of an earthquake and indicate the location and distance of the earthquake. This cannot but be said to be a great work of piezoelectric ceramics.

The deformation of piezoelectric ceramics under the action of an electric field is very small, at most not more than one ten millionth of its own size. Don’t underestimate this tiny change. The precise control mechanism made based on this principle-the piezoelectric actuator, is The control of precision instruments and machinery, microelectronics technology, bioengineering and other fields are a great boon.

Frequency control devices such as resonators and filters are key components that determine the performance of communication equipment. Piezoelectric ceramics have obvious advantages in this regard. It has good frequency stability, high accuracy and wide applicable frequency range, and is small in size, does not absorb moisture, and has a long life. Especially in multi-channel communication equipment, it can improve the anti-interference performance, so that the previous electromagnetic equipment cannot be matched and faced with the problem. Alternative destiny.

Let’s look at a new type of bicycle shock absorber controller. It is difficult for ordinary shock absorbers to achieve a smooth effect. This ACX shock absorber controller, through the use of piezoelectric materials, provides for the first time a continuously variable shock absorber function. A sensor monitors the movement of the impact piston at a rate of 50 times per second. If the piston moves quickly, it is usually caused by a rapid impact due to driving on uneven ground. At this time, the maximum shock absorption function needs to be activated; if the piston movement is slow, then It means that the road is flat and only weaker shock absorption function is needed.

It can be said that although piezoelectric ceramics are new materials, they are quite commonplace. It is used in high technology, but it is more for people’s eyes in life to create a better life.