An embedded micro-deep hole drilling force measurement system is proposed and verified experimentally, it is based on resistance strain gauge, weak signal detection method and embedded technology. The system can measure the thrust force, tangential force and two orthogonal components of radial force precisely, continuously and stably in real time, while other similar systems can measure only thrust force usually. The system can replace the complex modelling of drilling process to obtain random changing details of drilling forces, and can also be used effectively in intelligent drilling control research.

In order to correct the effects of stray light on spectrophotometer in real time, a method based on Pulse-Width Modulation (PWM) was proposed, which makes up for the deficiency of traditional instruments under the variation of interference source and improves the rapid deployment capability in the wild. A system verifying to underlie the method was designed. Compared with commercial instruments under the interference of different light sources, the experimental results show that the method successfully corrected the error caused by stray light and improved the accuracy and stability of the measurement. At the same time, the convenient and sensitive technique offers great prospect for simple and cost-effective absorptive analysis instruments of stray light correction.