英语翻译In the calibration phase a mechanical rotary positioningdevice is used to generate a set of referenceangles.For each reference angle the output fromthe encoder is acquired and the errors for each digitalcode of the encoder are stored in a

英语翻译In the calibration phase a mechanical rotary positioningdevice is used to generate a set of referenceangles.For each reference angle the output fromthe encoder is acquired and the errors for each digitalcode of the encoder are stored in a
英语翻译
In the calibration phase a mechanical rotary positioning
device is used to generate a set of reference
angles.For each reference angle the output from
the encoder is acquired and the errors for each digital
code of the encoder are stored in a memory for
post-processing error compensation.The accuracy
and resolution of the mechanical positioning device
must be at least four times higher than the correspondent
encoder’s values.Fig.1 represents the system
block diagram used for calibration purposes.
The calibration system includes the encoder,a manual
or automatic precision rotary stage,a set of 8
pull-up resistors,a data acquisition board (NIDAQ
ATMIO-16E4) and a personal computer (PC).
After calibration the main characteristic of the
encoder,namely INL and DNL errors,are evaluated
and the correction coefficients,stored in the microcontroller’s
memory,are used to provide error compensation
during measuring phase.Fig.2 represents
the hardware block diagramof the measuring system
that includes mainly the encoder,a microcontroller
(PIC16F877) and a transceiver (MAX233) that provides
multi channel communication compatibilities
with RS232 interfaces (±12 V).The microcontroller
has an 8 K bytes program memory where one or several
look-up tables can be previously stored.Segmentation
of encoder’s characteristic and linear
interpolation techniques can also be applied if there
is memory space restrictions caused by program or
multiple look-up table storage.
The look-up table implemented in the microcontroller
memory has a discrete function profile that is

英语翻译In the calibration phase a mechanical rotary positioningdevice is used to generate a set of referenceangles.For each reference angle the output fromthe encoder is acquired and the errors for each digitalcode of the encoder are stored in a
在定标阶段一机械转台式安置
设备被使用引起一套参考
角度.为各个参考角度产品从
编码器被获取和错误为每个数字式
编码器的代码被存放在记忆为
后加工错误报偿.准确性
并且机械安置的设备的决议
比通讯员必须是至少四时间更加高级
编码器的价值.图1 代表系统
结构图被使用为定标目的
定标系统包括编码器,指南
或自动精确度转台式阶段,一套8
拉扯电阻器,数据采集板(NIDAQ