CAJ | 학술논문

文章通过对相位重合检测技术的分析，提出了基于此理论并用ARM7作为主控芯片的高精度频率计的设计方法。该设计方法通过捕捉相位之间的重合点，能够有效消除±1个字的计数误差。在此基础上由于ARM7具有32位的处理器内核以及流水线技术，使得频率计的测量速度和精度比传统的使用16位单片机设计的频率计要高很多。本频率计最大测量频率为10MHz。同时本设计采用安捷伦公司生产的恒温晶振10811A作为标准频率，能够有效保证测量精度能够达到10-10量级。为了降低成本，在设计中选用采用ARM7芯片内部的计数器以及用简单的逻辑电路进行设计。由于其测量精度要超过多周期同步测量法，而成本又比模拟内插法和游标法低很多，因此此频率计拥有很广泛的市场前景。
문장통과대상위중합검측기술적분석，제출료기우차이론병용ARM7작위주공심편적고정도빈솔계적설계방법。해설계방법통과포착상위지간적중합점，능구유효소제±1개자적계수오차。재차기출상유우ARM7구유32위적처리기내핵이급류수선기술，사득빈솔계적측량속도화정도비전통적사용16위단편궤설계적빈솔계요고흔다。본빈솔계최대측량빈솔위10MHz。동시본설계채용안첩륜공사생산적항온정진10811A작위표준빈솔，능구유효보증측량정도능구체도10-10량급。위료강저성본，재설계중선용채용ARM7심편내부적계수기이급용간단적라집전로진행설계。유우기측량정도요초과다주기동보측량법，이성본우비모의내삽법화유표법저흔다，인차차빈솔계옹유흔엄범적시장전경。
In this paper, based on the analysis of the phase coincidence detection technology, a design method of a high precision frequency meter which is based on this theory and uses ARM7 as the main control chip is proposed. The design method can effectively eliminate the counting error of ±1 words by capturing the coincidence point between phases, On this basis, because the ARM7 has a 32 bit processor core and pipeline technology, the measurement speed and accuracy of the frequency meter is much higher than that of the traditional ones using 16 bit single-chip design. The maximum measurement frequency of the frequency meter is 10MHz. At the same time, this design uses the OCXO 10811A produced by Agilent as the standard frequency and the measurement accuracy can reach 10-10 order of magnitude. In order to reduce the cost, the design chooses the counters built in ARM7 chip and uses a simple logic circuit to design. Its measurement precision is superior over multiple cycle synchronous measurement and its cost is much lower than those of the analog interpolation method and the cursor method, so this frequency meter has a very broad market prospect.