The mechanism of ultrasonic assisted grinding is presented. Single factor experiment method was used to conduct experiments in order to reveal the effect of different grinding parameters (including feed rate, spindle speed, grinding depth) on surface roughness and grinding force of optical glass in ultrasonic assisted grinding and conventional grinding. The experiment data wss analyzed and it shows that the surface roughness and tangential grinding force decrease while the axial grinding force increase in ultrasonic assisted grinding process than that in conventional grinding process.
While the development of automobile has provided convenience to people's daily life and economic activities, vehicle exhaust has also brought serious environmental pollution. The harmful gas produced by cars contains hydrocarbons and hydronitrogens. Among them, acetylene gas which belongs to atmospheric trace gases, cannot be affected by environmental factors. With the theory of tunable diode laser absorption spectroscopy (TDLAS) technique, wavelength modulation and harmonic detecting technique, this system uses the intelligent data acquisition and processing system based on MSP430 to detect acetylene gas in real-time and display the vehicle exhaust. The system has a good stability, high measuring accuracy and long service life. It is cheap and easy to maintain. It realized low power design.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.