General characteristics of each individual included in the study and their angular measurements
obtained by the Cobb method and by the computerized photogrammetry method in the thoracic and lumbar regions.
Figure 4, in particular, shows the statistical distribution of errors in Galileo's angular measurements
. The errors are obtained by comparing Galileo's measurements to the 'true' (in the meaning of 'very precise') values of the software-reconstructed angular positions.
The highest correlated values were observed in 1 proportional and 1 angular measurement
(XR-XL/Tr-Me, and A-N-B).
Available in 12 individual models per series, with angular measurement
ranges from [+ or -]3[degrees] to [+ or -]90[degrees], and choices of single axis (SX41200) and twin axis (SX41400) versions, their design incorporates a galvanometric pendulum sensing element with hydromechanical damping, combined with an optical position sensor, with 4-20 mA or [+ or -]5 VDC ([+ or -]5 percent) output, proportional to sine of the angle of tilt.
The answer, researchers found, lay in using lightweight materials and miniaturizing the sensors, which fall into two categories: angular measurement
systems that are based on magnetic principles; and acceleration and rate-of-rotation sensors.
The LDS electronic autocollimator, for non-contact angular measurement
and alignment tasks, is a calibrated measurement tool that offers quick set-up and ease of use, and provides a cost-effective solution in a portable package.
As shown in Figure 1, the location accuracy is a function of both angular measurement
error and distance to the emitter being measured.
PMI360DV angular measurement
sensors enable users to set the measurement range and rotation direction, PNP output signal width and zero position, with dedicated buttons for each configurable function to simplify set-up.
Magnetic Angle Sensor Includes SAE SENT J2716 Interface austriamicrosystems has announced the AS5165, a contactless magnetic angle position sensor for accurate angular measurement
over a full 360[degrees].
Key Words: Cephalometry, Linear Measurement, Angular Measurement
, Soft tissue analysis, Gender differences.
Two linear measurements, mandibular ramus height, ramus width and one angular measurement
, mandibular gonial (Go) angle were analysed.
The angular measurement
described by these two lines is a resultant of their individual inclinations.
2 There was no statistical difference between the different methods in measuring the upper incisors inclination, and the angular measurement
meth-ods were closely correlated.
They concluded that according to the head rotation, angular measurements
had fewer projection errors than linear measurements.
TABLE 3: DESCRIPTIVE STATISTICS OF ANGULAR MEASUREMENTS
IN HORIZONTAL LIP POSITION