CAJ | 학술논문

介绍了一套基于耐久性好、价格低廉及全天候运行的水泥基压电传感器的交通量监测系统.首先将两个水泥基压电传感器埋入一段混凝土梁的两端,以此梁作为埋入路面下的传感单元.再将4根测试好的混凝土梁埋入一条车道的两道沟槽内,每道槽内放入两根.系统运行时通过传感器数据分析来计算交通流量,即以测试信号中的峰值个数计算车辆数,以传感器的响应之和计算车重,并以两道沟内传感器响应的时间差及距离计算车速.其后通过已知重量的卡车进行传感系统现场标定.目前,该套系统已经成功安装到一座高速公路桥梁中,且运行顺利.通过与视频监测结果的对比表明,该系统能够准确的获得车流量、车辆速度以及近似重量.进而可见,该水泥基压电传感器在交通量监测中是有效的.
개소료일투기우내구성호、개격저렴급전천후운행적수니기압전전감기적교통량감측계통.수선장량개수니기압전전감기매입일단혼응토량적량단,이차량작위매입로면하적전감단원.재장4근측시호적혼응토량매입일조차도적량도구조내,매도조내방입량근.계통운행시통과전감기수거분석래계산교통류량,즉이측시신호중적봉치개수계산차량수,이전감기적향응지화계산차중,병이량도구내전감기향응적시간차급거리계산차속.기후통과이지중량적잡차진행전감계통현장표정.목전,해투계통이경성공안장도일좌고속공로교량중,차운행순리.통과여시빈감측결과적대비표명,해계통능구준학적획득차류량、차량속도이급근사중량.진이가견,해수니기압전전감기재교통량감측중시유효적.
In this paper, the field test of a traffic monitoring system based on a novel cement-based piezoelectric traffic sensor which is durable, inexpensive and can work under any weather conditions are presented. A concrete beam with two piezoelectric sensors respectively embedded at its two ends, as a sensing element, is designed to be installed under the wearing course of highway. Four beams, two pieces in two rows, are installed in one lane, for counting traffic flow according to the number of peaks in the responses of sensors, recording the speed of vehicles in terms of the time shift between the responses of two sensors in two rows and the distance of two rows, and measuring the gross weight of vehicles using the amplitude of peaks in sensor′s response and calibrated sensitivity of the sensor. After installation of the beams, the field recalibration using a known-weight truck is carried out for checking the validity of the sensors. Online running of the developed traffic monitoring system installed on the exit road of a highway bridge in HK was performed. The results of field test show that the traffic monitoring system can correctly measure the volume, speed and gross weight of vehicles, which indicates that the system has a good potential to be used in management and health monitoring of highway bridge.