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1. CN102736511 - Time measurement system and time measurement method

Office China
Application Number 201110085417.9
Application Date 06.04.2011
Publication Number 102736511
Publication Date 17.10.2012
Grant Number
Grant Date 20.08.2014
Publication Kind B
IPC
G04F 10/00
GPHYSICS
04HOROLOGY
FTIME-INTERVAL MEASURING
10Apparatus for measuring unknown time intervals by electric means
Applicants Institute of High Energy Physics, Chinese Academy of Sciences
Inventors Wang Peilin
Wei Shujun
Li Daowu
Shuai Lei
Feng Baotong
Hu Tingting
Sun Yunhua
Wei Long
Agents lei zhigang pan shilin
Title
(EN) Time measurement system and time measurement method
(ZH) 时间测量系统及时间测量方法
Abstract
(EN)
The invention relates to a time measurement system, which comprises a start signal fine time measurement unit, a timing signal fine time measurement unit, a rough time measurement unit and a time calculation unit, wherein the start signal fine time measurement unit comprises a delay chain, a plurality of registers and a data converter; one end of the delay chain receives a start signal; outputs of delay units receiving the start signal are sequentially changed into second levels; each register reads and stores an output value of the corresponding delay unit at the rising edge of a first clock when the start signal is input; the data converter converts the stored data into time data to acquire start signal fine time; the timing signal fine time measurement unit is used for acquiring timing signal fine time; the working theory of the timing signal fine time measurement unit is similar to that of the start signal fine time measurement unit; the rough time measurement unit is used for measuring rough time under the driving of a field programmable gate array (FPGA) clock signal; and the time calculation unit is used for subtracting the timing signal fine time from a sum of the rough time and the start signal fine time to acquire time to be measured. According to the system, the precision and the instantaneity of time measurement are improved.

(ZH)

本申请涉及一种时间测量系统,包括:起始信号精细时间测量单元,包括延迟链、多个寄存器及数据转换器,延迟链的一端接收起始信号,使接收到起始信号的延迟单元的输出依次变为第二电平,各寄存器在输入起始信号后的第一个时钟上升沿时读取并保存对应的延迟单元的输出值,数据转换器将保存的数据转换为时间数据以获取起始信号精细时间;定时信号精细时间测量单元,用以获取定时信号精细时间,工作原理与起始信号精细时间测量单元类似;粗时间测量单元,在FPGA时钟信号的驱动下测量粗时间;以及时间计算单元,将粗时间和起始信号精细时间之和减去定时信号精细时间以获取待测时间。本发明提升了时间测量的精确性和实用性。