CN110796880A - Residual current detection early warning system for road traffic signal lamp - Google Patents
Residual current detection early warning system for road traffic signal lamp Download PDFInfo
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- CN110796880A CN110796880A CN201911049319.2A CN201911049319A CN110796880A CN 110796880 A CN110796880 A CN 110796880A CN 201911049319 A CN201911049319 A CN 201911049319A CN 110796880 A CN110796880 A CN 110796880A
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- residual current
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/095—Traffic lights
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
- H04L51/04—Real-time or near real-time messaging, e.g. instant messaging [IM]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
Abstract
The invention discloses a residual current detection early warning system for a road traffic signal lamp, which comprises an electric leakage detection platform, an electric safety monitoring host, a residual current monitor, a water logging sensor, an intelligent circuit breaker and a WeChat client; the electricity leakage detection platform is connected with the electricity safety monitoring host through the internet, provides Web service for the WeChat client, and is physically connected with the water sensor through an I/O signal line; the electricity safety monitoring host machine is physically connected with the residual current monitor through an RS-485 interface; the electricity safety monitoring host machine is physically connected with the intelligent circuit breaker through an RS-485 signal line; the invention can replace the traditional manual inspection mechanism, realize on-line real-time monitoring and control, prevent and eliminate the electric leakage risk in time, improve the working efficiency, reduce the maintenance cost and ensure the power utilization safety of the traffic signal lamp.
Description
Technical Field
The invention relates to the field of electric leakage detection and automatic control, in particular to a residual current detection early warning and control system of a road traffic signal lamp.
Background
At present, a mainstream road traffic signal lamp system adopts 220V alternating current power supply, and the functions of turning on, turning off and flashing of a signal lamp are controlled through a power supply line. Thus, the signal light cable is both a power supply cable and a control cable.
The traffic signal lamp in China has a double waterproof design, and the shell of the signal lamp group and each light-emitting unit have certain waterproof capability. Compared with the prior art, the signal lamp line flows out from the traffic signal control cabinet on the roadside, and is only waterproof by the rubber sheath, the waterproof adhesive tape and the like in the process of receiving each traffic signal lamp group through the special underground pipeline at the intersection, so that the weak link of electric leakage protection is realized. Common causes of electrical leakage are:
(1) damage of lamp wire and cable
Most of domestic lamp wire cables pass through intersections through underground embedded pipelines, and the construction time of pipelines at many intersections can be traced back to 20 years. After the superposition influence of various factors such as long-time load work, load bearing rolling, water invasion, rough construction, rat damage, corrosion and the like, the phenomena of damage of a protective layer and reduction of insulation resistance of a part of cables can occur.
(2) The lamp wire joint is processed irregularly
In China, a plurality of signal lamps are often installed in the same phase and the same direction. When cables are installed or maintained, the situation of embedded pipelines is limited, so that the 'one-lamp-one-line' required in the road traffic signal lamp setting and installation specifications (GB 14886-2006) cannot be achieved, and the cables are often connected in parallel with available cables. If the parallel connection position is in a position which is easy to be soaked in water and no waterproof measure is made, the parallel connection position is easy to become a leakage fault point.
(3) Poor grounding
The ground protection measures of the traffic signal lamp system mainly comprise two parts, namely, the ground of a traffic signal lamp pole and the ground of a traffic signal control cabinet, and the ground protection resistance of the signal lamp pole is less than 10 omega according to the requirements in the road traffic signal lamp setting and installation specifications (GB 14886-2006). Considering the factors of construction quality, material cost and time, even if the equipment meeting the grounding requirement in the process of acceptance is in line with the passage of time, the possibility of corrosion of the ground screen and performance reduction of the grounding rod is gradually increased, and the grounding resistance does not meet the national standard, but the problems cannot be found through daily manual inspection.
In the south, when the water enters the flood season in 5 months every year, the problems of reverse seawater flow, excessive rainfall and the like often occur. Road traffic facilities are easy to have electric leakage and electric shock accidents in accumulated water. In the initial stage of an accident, the leakage current is small and is not easy to be perceived, and after the quality of the leakage current becomes worse with the lapse of time, an electric shock injury accident occurs randomly. The traditional manual inspection mechanism cannot prevent the occurrence of such events, and only by establishing a set of online system for monitoring the leakage current of the signal lamp cable, real-time monitoring and alarming are realized, historical data analysis and risk trend judgment are carried out, and the leakage risk can be prevented and solved in time.
Disclosure of Invention
The invention is designed to solve the technical problems and is a residual current detection and early warning system for a road traffic signal lamp.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a residual current detection early warning system for a road traffic signal lamp comprises a leakage detection platform, an electric safety monitoring host, a residual current monitor, a water logging sensor, an intelligent circuit breaker and a WeChat client; the electricity leakage detection platform is connected with the electricity safety monitoring host through the internet, provides Web service for the WeChat client, and is physically connected with the water sensor through an I/O signal line; the electricity safety monitoring host machine is physically connected with the residual current monitor through an RS-485 signal line; the electricity safety monitoring host machine is physically connected with the intelligent circuit breaker through an RS-485 signal line; the working process is as follows: the residual current monitor collects leakage signals of each lamp wire, and sends the collected leakage current values of each circuit to the electricity safety monitoring host through the RS-485 signal wire; the electricity safety monitoring host machine judges the leakage current value of each path, and simultaneously acquires signals of the water sensor to judge the state of the water sensor; the electricity utilization safety monitoring host locally records data and states, and uploads the data to the electric leakage detection platform in a 4G communication mode; and after analyzing and processing the data by the electric leakage detection platform, pushing the data to the client WeChat platform through the web service.
The residual current detection early warning system for the road traffic signal lamp is characterized in that the electric leakage detection platform calls remote monitoring equipment data connected with the electricity utilization safety monitoring host through a 4G communication mode.
The residual current detection early warning system for the road traffic signal lamp is characterized in that the electric leakage detection platform has a function of inquiring fault and alarm information of a residual current monitor and a water sensor, and the electric leakage detection platform counts and classifies the obtained fault and alarm information and distributes the fault and alarm information to the WeChat client.
The residual current detection early warning system for the road traffic signal lamp has the advantages that the electric leakage detection platform has the functions of user management, log management, report management and database management.
In the residual current detection and early warning system for the road traffic signal lamp, the electric leakage detection platform sends control commands and parameters to the electricity safety monitoring host machine in a 4G communication mode.
According to the residual current detection and early warning system for the road traffic signal lamp, the electric leakage detection platform adopts the GIS map function, and the position, the state and the fault information of each electricity utilization safety monitoring host are displayed on the electronic map.
The residual current detection and early warning system for the road traffic signal lamp is characterized in that the residual current monitors are provided with 2 RS-485 interfaces, and all the residual current monitors are cascaded through the RS-485 interfaces and then connected with the electricity safety monitoring host through the RS-485 interfaces.
The residual current detection early warning system for the road traffic signal lamp is characterized in that the electric leakage detection platform can automatically or manually control the intelligent circuit breaker to work in an open circuit or open circuit state through the electricity safety monitoring host.
The residual current detection and early warning system for the road traffic signal lamp has the advantage that the electricity safety monitoring host can automatically or manually control the intelligent circuit breaker to work in an open circuit or open circuit state.
The residual current detection and early warning system for the road traffic signal lamp is characterized in that a WeChat client side of the residual current detection and early warning system is provided with:
① user login, user login using platform account;
② inquiry function, inquiring the state of single electricity safety monitoring host on WeChat,
inquiring the state of the power utilization safety monitoring host in the whole area on the WeChat;
③ setting function, setting operation is carried out on single electricity safety monitoring host computer on WeChat,
uniformly setting the electricity safety monitoring host on the WeChat;
④ inquiring the fault record, wherein the inquiry condition includes crossing name, time and/or controller number;
⑤ alarm pushing, wherein the alarm or fault can be pushed to the WeChat client immediately.
Introduction to System functionality
The system is a safety monitoring protection system which is specially used for signal lamps and takes high-precision electric leakage monitoring, water immersion monitoring and networking alarm as core functions. The system comprises an intelligent traffic signal lamp electricity utilization safety monitoring host, a signal lamp residual current monitor, a water logging sensor, an intelligent circuit breaker and central platform software, and 5-core functions are achieved.
1. Leakage monitoring
The equipment deployed at the intersection consists of 1 power utilization safety monitoring host and 4 signal lamp residual current monitors, can monitor cables of 32 signal lamps, and has a monitoring range of 3-100 mA. Once the leakage current exceeding the early warning threshold value is monitored, the equipment can immediately report the central platform software to inform relevant working personnel.
2. Water immersion monitoring
A water immersion sensor is attached to the power utilization safety monitoring host machine for preventing the situation that the signal cabinet is immersed in water to cause line electric leakage. The sensor is installed on the signal rack inner wall, and when the water level height reached the sensor probe, the equipment can report to central platform software immediately, informs relevant staff.
3. Remote power-off
The electricity safety monitoring host is attached with a wired control intelligent circuit breaker, and remote power down can be realized according to a platform instruction transmitted by a network. The operation is often used in the condition that the signal cabinet is invaded by accumulated water and leakage easily occurs.
4. Early warning analysis
Data monitored by the electricity safety monitoring host computer can be reported to the central platform, and the platform can be permanently stored. The platform can carry out analysis from multiple dimensions such as time, space, weather, construction year generation and the like afterwards, and pre-judgment analysis of the hidden electric leakage danger is given in advance.
5. Extended functionality
RS-232 and RS-485 interfaces are reserved in the electricity safety monitoring host, and the embedded industrial personal computer has a powerful expansion function so as to meet other control requirements of users.
The invention has the beneficial effects that:
1. changing passive discovery to active prevention
According to the traditional operation and maintenance mode, the accident that the signal lamp is not lighted or flashes yellow or trips and the like is caused only when the signal lamp leaks electricity, and the accident can be discovered and processed. At present, a 'preventive maintenance' mechanism is started, from passive first-aid repair to normalized preventive maintenance, normalized inspection and dynamic management are carried out on the hidden danger of electric leakage, the hidden danger is timely eliminated in a bud state, problems are not accumulated, and intersection signal lamp equipment is always in a safe state. Even if the risk is temporarily unresolved, the risk identification can be carried out, control measures can be made, and all-round risk management and control can be implemented.
2. Replacing manual inspection by informatization means
For example, the average signal light density of intersections in Guangzhou city is about 20, each group of professional staff can only inspect 45 intersections each day by means of manual inspection, and the inspection frequency of each intersection in an administrative division is estimated to be about 1 time in 6 days. In rainy season, the inspection frequency can be further reduced. Only by utilizing a full-automatic sensing technical means, the low-efficiency working mode of manual inspection can be avoided, and the urgent repair work is focused on how to prevent and eliminate the hidden electric leakage trouble.
3. Guiding prevention work through data analysis and study
After the sensing equipment of the intersection is available, signal lamp electric leakage data of the intersection can be obtained in real time through a network. Based on the data, the occurrence place and the occurrence probability of the leakage hidden trouble can be judged in an expected way, so that auxiliary prompt is provided for the work of the emergency repair unit.
The residual current detection early warning system for the road traffic signal lamp replaces a traditional manual inspection mechanism, realizes online real-time monitoring and control, prevents and eliminates electric leakage risks in time, improves the working efficiency, reduces the maintenance cost and ensures the electricity utilization safety of the traffic signal lamp.
Drawings
Fig. 1 is a block diagram of the residual current detection and early warning system according to the present invention.
Fig. 2 is a block diagram of the residual current detection warning data flow according to the present invention.
Fig. 3 is a functional block diagram of software of the residual current detection early warning system according to the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in fig. 1-3, the invention relates to a residual current detection early warning system for a road traffic signal lamp, which comprises a leakage detection platform, an electric safety monitoring host, a residual current monitor, a water logging sensor, an intelligent circuit breaker and a WeChat client; the electricity leakage detection platform is connected with the electricity safety monitoring host through the internet, provides Web service for the WeChat client, and is physically connected with the water sensor through an I/O signal line; the electricity safety monitoring host machine is physically connected with the residual current monitor through an RS-485 signal line; the electricity safety monitoring host machine is physically connected with the intelligent circuit breaker through an RS-485 signal line; the working process is as follows: the residual current monitor collects leakage signals of each lamp wire, and sends the collected leakage current values of each circuit to the electricity safety monitoring host through the RS-485 signal wire; the electricity safety monitoring host machine judges the leakage current value of each path, and simultaneously acquires signals of the water sensor to judge the state of the water sensor; the electricity utilization safety monitoring host locally records data and states, and uploads the data to the electric leakage detection platform in a 4G communication mode; after the data are analyzed and processed by the leakage detection platform, the data are pushed to a client WeChat platform through a web service, as shown in FIG. 2.
The residual current detection early warning system for the road traffic signal lamp is characterized in that the electric leakage detection platform calls remote monitoring equipment data connected with the electricity utilization safety monitoring host through a 4G communication mode.
The residual current detection early warning system for the road traffic signal lamp is characterized in that the electric leakage detection platform has a function of inquiring fault and alarm information of a residual current monitor and a water sensor, and the electric leakage detection platform counts and classifies the obtained fault and alarm information and distributes the fault and alarm information to the WeChat client.
In the residual current detection and early warning system for the road traffic signal lamp, the electric leakage detection platform has the functions of user management, log management, report management and database management, as shown in fig. 3.
In the residual current detection and early warning system for the road traffic signal lamp, the electric leakage detection platform sends control commands and parameters to the electricity safety monitoring host machine in a 4G communication mode.
According to the residual current detection and early warning system for the road traffic signal lamp, the electric leakage detection platform adopts the GIS map function, and the position, the state and the fault information of each electricity utilization safety monitoring host are displayed on the electronic map.
The residual current detection and early warning system for the road traffic signal lamp is characterized in that the residual current monitors are provided with 2 RS-485 interfaces, and all the residual current monitors are cascaded through the RS-485 interfaces and then connected with the electricity safety monitoring host through the RS-485 interfaces.
The residual current detection early warning system for the road traffic signal lamp is characterized in that the electric leakage detection platform can automatically or manually control the intelligent circuit breaker to work in an open circuit or open circuit state through the electricity safety monitoring host.
The residual current detection and early warning system for the road traffic signal lamp has the advantage that the electricity safety monitoring host can automatically or manually control the intelligent circuit breaker to work in an open circuit or open circuit state.
The residual current detection and early warning system for the road traffic signal lamp is characterized in that a WeChat client side of the residual current detection and early warning system is provided with:
① user login, user login using platform account;
② inquiry function, inquiring the state of single electricity safety monitoring host on WeChat,
inquiring the state of the power utilization safety monitoring host in the whole area on the WeChat;
③ setting function, setting operation is carried out on single electricity safety monitoring host computer on WeChat,
uniformly setting the electricity safety monitoring host on the WeChat;
④ inquiring the fault record, wherein the inquiry condition includes crossing name, time and/or controller number;
⑤ alarm pushing, wherein after alarm or failure occurs, the alarm can be immediately pushed to the WeChat public number.
Introduction to the device
(1) Traffic signal lamp electricity safety monitoring host
The hardware adopts an industrial embedded solution with a 32-bit cotex-A7528 MHz CPU as a core, and the software adopts an embedded operating system with linux 3.0.15 as a kernel, so that the application requirements of an industrial embedded host are integrally met. The components adopt automobile-level and industrial-level components, can normally and stably run in high-temperature, low-temperature, high-humidity and large-vibration environments, and have working temperature ranges as follows: -20 ℃ to 70 ℃.
The 4G communication and Ethernet communication modes can be selected, and the system cloud platform can be directly connected; the pairs may be RS485 in communication with the detectors. And a multipath isolation interface is reserved, a sensor, a switching value and a communication module can be accessed, and the switching value and the like can be output. The interfaces comprise 2 USB interfaces, 1 RS232 interface, 2 RS485 interfaces, 2 groups of I/O interfaces and 2 paths of 100M Ethernet interfaces; the data interaction or control can be carried out with other devices through an Ethernet interface, an RS232 interface, an RS485 interface and an I/O interface, and the data interaction or control can be defined by software.
(2) Residual current monitor for traffic signal lamp
The hardware of the embodiment uses a DSC platform of Feichalcar, a high-precision instrument amplifier and a 32-bit DSP to jointly carry out high-precision detection, and ensures that the current detection is stable and reliable. When the electric leakage of the line is detected, the line connection is prevented from being damaged, and non-contact detection and installation are carried out. The signal lamp system is not influenced by the product. The monitoring nodes have the following main technical parameters: the treater is 60MHz DSP, including 1 RS232 interface, 2 RS485 interfaces 2, and its normal operating temperature scope is: -20 ℃ to 70 ℃. Each residual current detector can monitor 8 signal lamp cables simultaneously, and each monitoring point can be used by 2-4 residual current detectors in a cascade combination mode.
(3) Water immersion sensor
The photoelectric water immersion sensor adopts an explosion-proof design and a drop-proof design, the probe adopts a corrosion-resistant spherical protective cover, the service life is prolonged, and the photoelectric water immersion sensor is suitable for various places needing leakage monitoring, such as IDC machine rooms, communication base stations, factories, hotels, warehouses, oil storage depots and the like. The selected water sensor technical parameters are shown in the following table:
(4) intelligent circuit breaker
Compared with a conventional circuit breaker, the intelligent circuit breaker is additionally provided with control lines, motors and other parts, and can receive signals of the main control node to power on and power off. The technical parameters of the intelligent circuit breaker are shown in the following table:
the present invention is not limited to the above-mentioned preferred embodiments, and any other products similar or identical to the present invention, which can be obtained by anyone based on the teaching of the present invention, fall within the protection scope of the present invention.
Claims (10)
1. A residual current detection early warning system for a road traffic signal lamp comprises a leakage detection platform, an electricity safety monitoring host, a residual current monitor, a water logging sensor, an intelligent circuit breaker and a WeChat client; the method is characterized in that: the electricity leakage detection platform is connected with the electricity safety monitoring host through the Internet, the electricity leakage detection platform provides Webservice for the WeChat client, and the electricity safety monitoring host is physically connected with the water sensor through an I/O (input/output) signal wire; the electricity safety monitoring host machine is physically connected with the residual current monitor through an RS-485 signal line; the electricity safety monitoring host machine is physically connected with the intelligent circuit breaker through an RS-485 signal line; the working process is as follows: the residual current monitor collects leakage signals of each lamp wire, and sends the collected leakage current values of each circuit to the electricity safety monitoring host through the RS-485 signal wire; the electricity safety monitoring host machine judges the leakage current value of each path, and simultaneously acquires signals of the water sensor to judge the state of the water sensor; the electricity utilization safety monitoring host locally records data and states, and uploads the data to the electric leakage detection platform in a 4G communication mode; and after the data are analyzed and processed by the electric leakage detection platform, the data are pushed to a client WeChat platform through the webservice.
2. The residual current detection and early warning system for the road traffic signal lamp as claimed in claim 1, wherein: the electric leakage detection platform calls remote monitoring equipment data connected with the electricity safety monitoring host through a 4G communication mode.
3. The residual current detection and early warning system for road traffic signal lamps according to claim 1 or 2, characterized in that: the electric leakage detection platform has a fault and alarm information query function for the residual current monitor and the water sensor, and distributes the fault and alarm information to the WeChat client after counting and classifying the obtained fault and alarm information.
4. The residual current detection and early warning system for the road traffic signal lamp as claimed in claim 1, wherein: the electric leakage detection platform has the functions of user management, log management, report management and database management.
5. The residual current detection and early warning system for the road traffic signal lamp as claimed in claim 1, wherein: and the electric leakage detection platform sends a control command and parameters to the electricity safety monitoring host machine in a 4G communication mode.
6. The residual current detection and early warning system for the road traffic signal lamp as claimed in claim 1, wherein: the electric leakage detection platform adopts a GIS map function, and displays the position, the state and the fault information of each electricity utilization safety monitoring host on an electronic map.
7. The residual current detection and early warning system for the road traffic signal lamp as claimed in claim 1, wherein: the residual current monitors are provided with 2 RS-485 interfaces, and all the residual current monitors are cascaded through the RS-485 interfaces and then connected with the electricity safety monitoring host through the RS-485 interfaces.
8. The residual current detection and early warning system for the road traffic signal lamp as claimed in claim 1, wherein: the electric leakage detection platform can automatically or manually control the intelligent circuit breaker to work in an open circuit or open circuit state through the electricity safety monitoring host.
9. The residual current detection and early warning system for the road traffic signal lamp as claimed in claim 1, wherein: the electricity safety monitoring host can automatically or manually control the intelligent circuit breaker to work in an open circuit or open circuit state.
10. The residual current detection and early warning system for the road traffic signal lamp as claimed in claim 1, wherein: the WeChat client is provided with:
① user login, user login using platform account;
② inquiry function, inquiring the state of single electricity safety monitoring host on WeChat,
inquiring the state of the power utilization safety monitoring host in the whole area on the WeChat;
③ setting function, setting operation is carried out on single electricity safety monitoring host computer on WeChat,
uniformly setting the electricity safety monitoring host on the WeChat;
④ inquiring the fault record, wherein the inquiry condition includes crossing name, time and/or controller number;
⑤ alarm pushing, wherein after alarm or failure occurs, the alarm can be immediately pushed to the WeChat public number.
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Application publication date: 20200214 |