Chengdu lamp light pole factory inspection technical reports

With the development of social economy, urban traffic undoubtedly become the focus of society is becoming more and more attention. Traffic lights is to ensure that the warp and woof of roads and road transportation and safety. Under this background, the real-time monitoring of operation of traffic signal lamp body and put forward the higher please

with the development of social economy, the urban traffic problem has increasingly become the focus of attention. The traffic light is the foundation of guarantee the road traffic flow and safety. In this context, real-time monitoring of traffic lights to run higher requirements are put forward. The traffic light at the traditional fault detection is still in regularly sent detection method, so the solar energy street light detection cycle is long, information response speed slow, high test cost. At present, traffic signals and other state examination including mutual inductance examination, partial pressure check, booster check, check the response of the light. Partial pressure check is the partial pressure of the circuit under test components together, through the check to the partial pressure element for charging pressure to determine whether there is current in the circuit under test. It has the advantages of simple circuit, low cost, high reliability, but power is relatively high, is not conducive to the heat of outdoor operation. In tandem booster transformer booster check is in the side of the circuit. After check the transformer secondary voltage, judge whether there is a current loop. Compared with the partial pressure check, its power consumption is greatly reduced, but larger transformer, influence the distribution density of lines. Light response test can be judged according to the light switch state light running state at that time, can effectively overcome the traditional detection scheme of external electrical leakage problem caused by misjudgment, still can prevent electromagnetic interference, but vulnerable to environmental interference. Mutual inductance detection in anti-interference and high precision traffic light state has incomparable advantage over other detection methods. According to practice signal detecting state of high precision and anti-interference requirements, from the hardware and software collaborative strategy to drive circuit signal processing, completed 8 times light state detection, and improve the anti-jamming ability of the system. Traffic light condition monitoring technology is one of the key technology of road traffic signal control is directly related to road traffic safety and unimpeded. This paper introduces a new multimodal traffic lights condition monitoring methods. The method is based on the principle of mutual inductance detection and transformer secondary output current. After dealing with the signal scheduling circuit, sent to the processor module samples. Then, check the light driver circuit of current, and through the optical coupler circuit check voltage driving circuit. This scenario multiplex traffic light condition monitoring system hardware based on MSP430F149 MCU, the internal integration of adc module to complete the multi-channel signal acquisition. However, some software through the median filtering algorithm processing the sampling data, effectively suppresses the additional samples values caused by pulse interference error. At the same time, due to disorders of adc gain error and error affecting the conversion accuracy, a self-tuning algorithm is presented to compensate for these two kinds of error, greatly improving the system precision. Finally, because the system choice gate operating mode switch to multiple channels, effectively improve the stability of the system. Actual test results show that the multi-channel traffic light detector has a simple, reliable, high precision, etc.