Application of 4G RTU in traffic light monitoring
Предпосылки
Urban traffic lights are core infrastructure ensuring smooth and safe traffic flow. Traffic lights placed in the field, if they malfunction (e.g., freeze, green light conflict, or damaged lights), can immediately cause traffic congestion and even accidents.
LED traffic warning signs are typically used in densely populated areas of highways, urban roads, and major arterial roads. These signs not only support changing the text but also can change the text color according to different weather conditions, facilitating traffic guidance.
Traditional operation and maintenance methods rely on traffic police patrols or citizen reports, resulting in delayed detection and low efficiency in handling the situation. This wastes a significant amount of manpower and effort. Therefore, 24/7 real-time monitoring and remote supervision of traffic lights and traffic warning signs is an essential modern management method.
Требования клиента
- Сбор данных
Remote acquisition of the signal controller's operating status (running/stopped/faulty), current signal light color (red, yellow, green), light malfunction information, and the operating status of external warning signs is required.
- Warning/Alarm
An alarm must be issued immediately when traffic light status abnormalities occur (e.g., prolonged all-red or all-green), green conflict risks, or light fixture meltdowns.
- Операции/управление
Supports remote modification of traffic warning sign text information; supports remote soft restart and parameter configuration of traffic lights; supports remote connection to the traffic signal controller's serial port for online debugging.
Техническое решение
Using the ZHC492C 4G RTU from IOTROUTER, connected to the text display circuit board via RS485, remote transparent transmission is achieved, allowing commands to be sent from the server to modify the warning sign text. Additionally, a DI is connected to the traffic light to monitor whether the sent commands are executed correctly and to monitor the light's status.
ZHC492C 4G RTU Introduction
The ZHC492C adopts an industrial-grade design, supporting 1 RS485 + 4 DI + 4 DO + 4 AI interfaces, including Modbus TCP/RTU, MQTT, and JSON protocols. The ZHC492C enables long-distance one-to-one, one-to-many, and many-to-many data transmission between devices in Group A and Group B through cloud networking configuration. Furthermore, it supports automatic data acquisition, DO remote following DI/AI, command pass-through, remote configuration/upgrade/debugging, and timed triggering. Its simple configuration and high ease of use allow users to quickly integrate it into their own systems.
Преимущества и ценность
- Real-time Online Monitorin
Provides stable and reliable 24/7 real-time monitoring to prevent traffic accidents. The 4G RTU wireless communication channel and rich interfaces perfectly adapt to traffic light monitoring scenarios.
- Remote Operation and Maintenance
Engineers can configure and debug traffic lights and warning signs remotely through configuration management software, just like on-site, greatly reducing fault repair time.
