CAJ | 학술논문

激光测距中,时间间隔的测量精度对测距精度起决定作用.针对时间间隔的测量精度问题提出了一种基于TDC-GP1计数芯片高精度测量方法,把时间间隔直接转化为高精度的数字,并结合软硬件的实现方法,通过DSP芯片控制TDC-GP1进行单通道的时间间隔测量,由内部粗计数器和精延时通道合作完成时间间隔测量,直接将待测时间间隔转换成数字量读出.实验结果表明,该模块测量频率快,单脉冲测量精度可达100 ps以内,线性度良好,可满足不同应用中的测速和精度要求.
격광측거중,시간간격적측량정도대측거정도기결정작용.침대시간간격적측량정도문제제출료일충기우TDC-GP1계수심편고정도측량방법,파시간간격직접전화위고정도적수자,병결합연경건적실현방법,통과DSP심편공제TDC-GP1진행단통도적시간간격측량,유내부조계수기화정연시통도합작완성시간간격측량,직접장대측시간간격전환성수자량독출.실험결과표명,해모괴측량빈솔쾌,단맥충측량정도가체100 ps이내,선성도량호,가만족불동응용중적측속화정도요구.
Measurement accuracy of time interval plays a decisive role in ranging accuracy in laser ranging process. According to measurement accuracy of time interval, a high accuracy measurement method is proposed based on TDC-GP1 counting chip. Time interval is directly converted into high accuracy number. Incorporated with the implement methods of software and hardware, TDC-GP1 is controlled by DSP chip to perform time interval mea?surement of single-channel. Time interval measurement process is completed by inner coarse counters and fine delay time channels. Time interval to be tested is directly converted into digital readout. The experiment results show that the module has fast measurement frequency, good linearity, and the single pulse measurement accuracy is less than 100 ps, which can meet the requirements of speed measurement and accuracy in different applications.