In the daily life and production, a lot of occasions such as car roll back, robot avoid hindering, industrial well logging, liquid level measurement of the reservoir etc. to need to carry on the range finding of non-contact automatically. Supersonic wave refers to the frequency the machinery produced in the elastic medium greater than 20 kHz shakes the wave, it have the intersection of
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directivity and strong, energy dissipation slowly the intersection of propagation length and characteristic such as being relatively far, often used for the range finding of non-contact. Because supersonic wave is insensitive to light, color and electromagnetic field, there is better adaptive capacity on environment in ultrasonic range finding, in addition ultrasonic measurement when real, precision, but also price can trade off well. For this reason, try to regard one-chip computer AT89S52 as the core in the article, utilize a pair of 40 kHz piezo-electric ultrasonic transducers to design a section of minor volume, cheap, precision great, having temperature compensation, real-time LCD revealing and warning ultrasonic ranger. The ultrasonic static divides two kinds into machinery way and electricity way, it is actually a kind of changer, convert acoustic energy, on the contrary receiving end to electric energy or mechanical energy in the intersection of transmitting terminal and it. Design the ultrasonic static to adopt the piezoelectric type ultrasonic transducer in the electric way this time, it makes use of crystalline syntony of piezoelectricity to work. It has two piezo-electric crystal plates and a sound board. When its extra pulse signal of the two poles, its frequency means the inherent oscillating frequency of the piezo-electric crystal plate, the resonance will take place in the piezo-electric crystal plate, and...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
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The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
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In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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