Engine testing requires a wide range of test items, such as torque (force), speed, pressure, temperature, flow, flow velocity, noise, position and displacement, etc., and involves a variety of test te
Reversing radar is a parking safety auxiliary device for cars. It can inform the driver of the surrounding obstacles by sound or more intuitive display, eliminating the trouble caused by the driver lo
LED has a wide range of applications, but the high price of the chip itself and the problem of the need to improve the luminous efficiency have always plagued the promotion and popularization of LED l
Abstract : Based on the principle of pulse frequency modulation and demodulation, this paper designs a photoelectric measurement transmission system. The circuit structure of the system transmitter an
[b]0 Introduction[/b]As society's demand for energy grows, the problem of "energy security crisis" becomes more and more prominent. In this regard, economist and sociologist Scherherman once proposed