Battery Monitoring's basic function is to monitor battery status. It can be able to timely report the states to
user in order to maximize using of battery storage capacity and cycle life. We use 1-wire bus digital sensor. The
sensor is DS2438.It can detect voltage, current, power consumption and temperature of the battery. 1~Wire Bus is
a technology that it can communicate with the peripheral only with one line. This can greatly save system
resources. Digital sensors integrates A/D conversion and the measured data is the digital traffic. This can improve system integration, simplify the circuit.
The parameter of laser beam is to evaluate the characteristics of the laser beam from quality. Laser
beam analysis apparatus in this paper is use knife-edge method to get the laser beam quality. This
machine move knife-edge line with laser beam cross section, which on the mechanical platform.
Light detector measure the transmission power of laser beam. The sensor's analog signal input the
A /D converter, then change digital corresponding signals. The instrument's measure system can
calculated the parameter of the laser beam though the power and the position of the power that be
measured.
The knife-edge in the measure system must be sure has good quality, thinning enough, and
must be perpendicular to the direction of the axis laser beam, or it will impact on measurement
accuracy. During the measure process, in order to decrease the measurement error we must
carefully rotating micrometer screw device. It mainly because the response speeds of light detector
and A/D converter is not fast enough.
In waist position, laser power density is relatively high, so the situation should be based on
the actual choice of laser power to prevent the knife-edge will not burn.
At last using the MATLAB to carry out the simulation analysis, the method is proved that it
can accurately recover the complicated energy distribution, and the system is proved that it can
improve the measurement accuracy effectively and can get parameter of laser beam goodly.
Key words: knife-edge method, laser beam quality, MATLAB, energy distribution, laser beam
analysis apparatus, natural density filter
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