摘要
嵌入了微处理器的智能仪器的数字校准，是采用软件方法实现仪器的零值误差和幅值系数的校准。零值误差的校准，应根据A／D转换器不同的正负值输出方式采取不同的处理方法。幅值系数k的取值范围一般在0．97—1．03之间可调，且k的字长应保证其小数部分改变一个LSB时。仪器显示值的变化不超过±1个宇。另外，校准参数的保护、校准用的人机交互界面的形成，都是不容忽视的环节。
The digital calibration of intelligent instruments imbedded with a microprocessor can realize the calibration of zero error and amplitude value of the instruments by the method of software. In calibration of zero error, the digital calibration should take different ways for the different outputs of ADC positive and negative values. The range of amplitude coefficient k should be adjustable from 0.97 to 1.03, and its length should assure that the variation of instrument display is less than ± 1 digital word when the decimal part has changed 1 LSB. Furthermore, the protection of calibration parameters and the design of human - machine interface cannot be neglected.
出处
《计量学报》
EI
CSCD
北大核心
2006年第1期57-60,共4页
Acta Metrologica Sinica
基金
浙江省科技计划资助项目(2005C31069)
关键词
计量学
数字校准
零值误差
幅值系数
参数保护
校准界面
智能仪器
Metrology
Digital calibration
Zero error
Amplitude coefficient
Parameter protection
Calibration interface
Intelligent instruments
