ISSN:
1089-7623
Quelle:
AIP Digital Archive
Thema:
Physik
,
Elektrotechnik, Elektronik, Nachrichtentechnik
Notizen:
A new mechanism to balance the torque induced on goniometer arms was developed to prevent serious mechanical difficulties of goniometers. Since the amount of the torque induced by its own weight depends on the goniometer angle, a new angle-dependent torque is applied to the goniometer arms to balance the original torque. A system based on this mechanism consists of an angle sensor, a function calculator, and an actuator. The goniometer angle is detected by a displacement gauge, and subsequently converted to the appropriate value of the air pressure applied by an electropneumatic controller. A new torque is applied by the controller through a wire to the goniometer arm to balance the original torque. Nearly "torque-free'' operation of the goniometer became possible by this system, which was installed on the 2θ axis of the four-circle goniometer in the triple-axis/four-circle diffractometer, SIN-1, at PF-BL3A. The axis has been able to scan as fast as 2θ=100°/min under a maximum torque of 500 Nm without any mechanical difficulties, for more than two years. © 1995 American Institute of Physics.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.1145824
Permalink