CAJ | 학술논문

针对测试系统中使用非美国国家仪器公司(NI)生产的采集设备,因为其底层硬件系统与Labview兼容性较差,造成测量信号的频率等时间值不准确的情况.提出两种解决办法,过零点测试法和VI数据处理法,其中过零点检测是基于差值定理通过寻找零点来测量频率,VI数据处理法是通过对VI模块的研究来实现其测量频率的目的.不仅在Labview平台上实现了这两种方法,而且利用某公司生产的型号为USB7660BN的采集卡加以验证,分别对频率为1 KHz,3 KHz,5 KHz,6 KHz的信号进行测量.测量结果表明,这两种方法所测误差均在1 Hz以内,全部能够完成测试要求.
침대측시계통중사용비미국국가의기공사(NI)생산적채집설비,인위기저층경건계통여Labview겸용성교차,조성측량신호적빈솔등시간치불준학적정황.제출량충해결판법,과영점측시법화VI수거처리법,기중과영점검측시기우차치정리통과심조영점래측량빈솔,VI수거처리법시통과대VI모괴적연구래실현기측량빈솔적목적.불부재Labview평태상실현료저량충방법,이차이용모공사생산적형호위USB7660BN적채집잡가이험증,분별대빈솔위1 KHz,3 KHz,5 KHz,6 KHz적신호진행측량.측량결과표명,저량충방법소측오차균재1 Hz이내,전부능구완성측시요구.
For the use of non National Instruments (NI) acquisition equipment in the test system, poor compatibility of its underlying hardware system and Labview causes measuring frequency and time value was not accurate. Two solutions are proposed including zero crossing test method and VI data processing method, and using zero crossing test method to measure the frequency was based on the Error Theorem by finding zero ,VI data processing method achieves the aim to measure the frequency by the research on VI model . Not only these two methods are implemented in the Labview platform, but also are confirmed for USB7660BN acquisition equipment by measure signals whose frequency is 1KHz, 3KHz, 5KHz, 6KHz respectively. Results show that two methods measured the error of less than 1Hz and could complete all testing requirements.