CN110728854A - Traffic signal machine network monitoring system - Google Patents
Traffic signal machine network monitoring system Download PDFInfo
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- CN110728854A CN110728854A CN201911040913.5A CN201911040913A CN110728854A CN 110728854 A CN110728854 A CN 110728854A CN 201911040913 A CN201911040913 A CN 201911040913A CN 110728854 A CN110728854 A CN 110728854A
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- traffic signal
- main control
- wireless communication
- data acquisition
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/097—Supervising of traffic control systems, e.g. by giving an alarm if two crossing streets have green light simultaneously
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/02—Monitoring continuously signalling or alarm systems
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
- G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
- G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
- G08B5/38—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources using flashing light
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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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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Electromagnetism (AREA)
- Traffic Control Systems (AREA)
Abstract
The invention discloses a traffic signal machine network monitoring system, which comprises a monitoring terminal, a main control module, a power supply module, a voltage stabilizing module, a data acquisition module, a data processing module, a GPRS wireless communication module and a GPS positioning module, wherein the monitoring terminal is connected with the main control module; the main control module is connected with the data acquisition module, the data processing module, the GPRS wireless communication module and the GPS positioning module; the output end of the power supply module is connected with the input end of the voltage stabilizing module, and the output end of the voltage stabilizing module is respectively connected with the main control module, the data acquisition module, the data processing module, the GPRS wireless communication module and the GPS positioning module; the main control module is also communicated with a host used for sending traffic signal instructions through a GPRS wireless communication module; the invention is suitable for various complex traffic intersections, and managers can quickly and accurately acquire fault reasons and places and process faults in time; the labor intensity and cost of manual investigation are reduced, and the stable operation of the traffic signal machine is ensured.
Description
Technical Field
The invention relates to the field of traffic signal machine monitoring, in particular to a traffic signal machine network monitoring system.
Background
With the continuous development of social economy and the rapid increase of traffic volume, the traffic signal lamp is used as an important device for urban traffic operation, if the traffic signal lamp fails, the whole urban traffic is disordered, and the timely troubleshooting and solving of the failure of the traffic signal lamp are necessary capabilities. However, the traffic signal control system has faults almost every day, and at present, the working state of a signal lamp is extracted mainly by means of images shot by an electronic camera at an intersection, whether the signal lamp has a fault or not is judged, but image fusion is needed, the algorithm is complex, the real-time performance is poor, a fault detection project is simple, the running state of equipment cannot be comprehensively reflected, and the fault reason and the fault location cannot be accurately positioned, so that the traffic signal control system is not widely applied, central unified management cannot be performed on a traffic signal machine, personnel patrol must be arranged every day, the efficiency is low, manpower and material resources are greatly wasted, and the public service level and quality of traffic facilities cannot be improved. At present, an urgent need exists for an automatic monitoring system for a traffic signal machine, which can simultaneously perform real-time monitoring and fault warning on multiple traffic signal machines, and a manager can rapidly and accurately acquire fault reasons and fault locations through monitoring signals, so that fault equipment can be maintained in time, and normal operation of roads can be guaranteed.
Disclosure of Invention
The invention aims to provide a traffic signal machine network monitoring system, which is used for solving the problems in the prior art, can accurately position the fault reason and the fault location in real time, and is convenient for a manager to monitor and manage a traffic signal lamp in real time and remove the fault in time.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a traffic signal machine network monitoring system, which comprises a monitoring terminal, a main control module, a power supply module, a voltage stabilizing module, a data acquisition module, a data processing module, a GPRS wireless communication module and a GPS positioning module, wherein the monitoring terminal is connected with the main control module;
the main control module is connected with the data acquisition module, the data processing module, the GPRS wireless communication module and the GPS positioning module; the output end of the power supply module is connected with the input end of the voltage stabilizing module, and the output end of the voltage stabilizing module is respectively connected with the main control module, the data acquisition module, the data processing module, the GPRS wireless communication module and the GPS positioning module; the output end of the data acquisition module is connected with the input end of the data processing module; the main control module is also communicated with a host used for sending traffic signal instructions through the GPRS wireless communication module.
Preferably, the master control module is further connected with a double-time-limit watchdog circuit.
Preferably, the data acquisition module comprises a signal machine input voltage detection module, a signal lamp output current detection module and an air switch state detection module.
Preferably, the data acquisition module is further connected with a photoelectric isolation system.
Preferably, the power module includes a mains supply connection module and a storage battery connection module, the mains supply connection module and the storage battery connection module can be switched with each other, and the storage battery is automatically switched to supply power under the condition of mains supply outage.
Preferably, the main control module sends information to a host for sending a traffic signal instruction through the GPRS wireless communication module after detecting the fault information, the host controls the fault traffic signal to execute yellow traffic signal lamp flashing, and the flashing frequency is different from the flashing frequency of the yellow traffic signal lamp when the traffic signal lamp normally works.
The invention discloses the following technical effects: the invention collects the input and output states of the annunciators in real time through the data collection module, analyzes and processes the input and output states through the main control module, accurately judges the fault type and the fault reason, realizes the accurate positioning of the fault traffic annunciator through the GPS positioning module and the control of the yellow light flickering, and simultaneously transmits the fault information and the position information to the monitoring terminal through the wireless transmission module, so that a manager can remotely monitor the operation states of the annunciators in real time, quickly and accurately acquire the fault reason and the fault location, and timely process the fault; the invention can be suitable for various complicated traffic intersections, reduces the labor intensity and cost of manual investigation, and effectively ensures the stable operation of the traffic signal machine.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a structural view of a traffic signal network monitoring system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, the embodiment provides a traffic signal network monitoring system, which includes a monitoring terminal, a main control module, a power module, a voltage stabilizing module, a data acquisition module, a data processing module, a GPRS wireless communication module, and a GPS positioning module;
the main control module is connected with the data acquisition module, the data processing module, the GPRS wireless communication module and the GPS positioning module; the output end of the power supply module is connected with the input end of the voltage stabilizing module, and the output end of the voltage stabilizing module is respectively connected with the main control module, the data acquisition module, the data processing module, the GPRS wireless communication module and the GPS positioning module; and the output end of the data acquisition module is connected with the input end of the data processing module.
The main control module is used for controlling each module to complete corresponding tasks; the main control module is also used for storing parameter setting information, analyzing and processing data from the data processing module, judging whether the traffic signal lamp has a fault and the type and reason of the fault, and generating a fault message; the main control module can also pass through GPRS wireless communication module sends information to the host computer that is used for sending the traffic signal instruction, this trouble traffic signal machine of host computer control carries out yellow traffic signal lamp scintillation, and the scintillation frequency is different with traffic signal machine normal during operation yellow light scintillation frequency, can remind pedestrian and vehicle to slow down and walk slowly on the one hand, reduces the traffic accident, and on the other hand maintainer can fix a position trouble signal machine fast accurately, carries out the troubleshooting.
The main control module adopts a PSD813F2A-90JI type single chip microcomputer, so that the power consumption is low and the running speed is high; the main control module is also connected with a watchdog circuit, and the watchdog circuit adopts a double-time-limit watchdog, so that the watchdog is effectively prevented from losing efficacy, the system crash is avoided, and the stability and the reliability of the monitoring system are ensured.
The power supply module is of a PM15CSJ060 model and is used for supplying power to all modules of the system; the power module comprises a mains supply connection module and a storage battery connection module, the mains supply connection module and the storage battery connection module can be mutually switched, the storage battery is automatically switched to supply power under the condition of mains supply outage, the alternating current machine network monitoring system can still continuously work for more than two hours, and failure messages are effectively prevented from being missed.
The voltage stabilizing module is an LM338 and provides 5V stabilizing voltage for providing matched voltage for each module, and permanent irreversible damage to each module due to overlarge or unstable voltage is prevented.
The data acquisition module comprises a signal machine input voltage detection module, a signal lamp output current detection module and an air switch state detection module; the voltage detection module is used for collecting the input voltage of the annunciator, and alarming if the input voltage is lower than a set threshold value of 176V, so that the brightness of the signal lamp is insufficient; the signal lamp output current detection module is used for collecting alternating current signals output by the traffic signal lamp and detecting common faults such as crossing green light conflict, same-phase traffic light conflict, whether the traffic signal lamp is on or not and whether the traffic signal lamp is off or not through current comparison; the air switch state detection module is used for collecting the state information of the air switch of the annunciator, and whether the current in the circuit of the annunciator exceeds the rated current or not can be accurately judged by detecting the connection and disconnection of the air switch.
The data acquisition module is also connected with a photoelectric isolation system, so that the anti-interference capability of the system is improved, and the accuracy of the acquired data is ensured.
The data processing module is used for processing the signals acquired by the data acquisition module, filtering the analog voltage signals acquired by the input voltage detection module into a smooth voltage value, and reading the voltage value into a single chip microcomputer chip of the master control module through a voltage stabilizing tube; converting the current signal acquired by the signal lamp output current detection module into a logic value which can be identified by the singlechip and has high and low level characteristics, and reading the logic value into a singlechip chip of the master control module; and the air switch state acquired by the air switch state detection module is represented by a binary value of 0 and 1, and is read into a single chip of the master control module.
The GPS positioning module is of an S-91-U7L model, has ultra-low power consumption, small volume and high sensitivity, is used for positioning the position of the signal machine and is matched with a built-in map.
The GPRS wireless communication module adopts an F2114 GPRS DTU model, has low power consumption and high transmission stability and is used for transmitting the fault information and the position information of the signal machine in the main control module to the monitoring center; the manager can send parameter setting information to the main control module through the GPRS wireless communication module, the parameter setting information comprises the number of traffic signal lamp lines to be collected, the input voltage threshold of a signal machine and the output current signals of all traffic signal lamps, and the main control module stores the parameter setting information.
The monitoring terminal comprises a monitoring center and a mobile phone terminal, and the monitoring center and the mobile phone terminal can remotely monitor the working state of each traffic signal machine in real time.
The working process of the traffic signal machine network monitoring system comprises the following steps:
the power supply is switched on, the power supply module supplies power to each module through the voltage stabilizing module, and the storage battery is automatically switched to supply power under the condition of mains supply outage; the administrator sends parameter setting information to the main control module through the GPRS wireless communication module; the main control module stores the parameter setting information and sends a data acquisition instruction to the data acquisition module; the traffic signal light control system comprises a voltage detection module, a signal light output current detection module, an air switch state detection module and a data processing module, wherein the voltage detection module is used for collecting an input voltage of a signal machine, the signal light output current detection module is used for collecting an alternating current signal output by a traffic signal light, and the air switch state detection module is used for collecting air switch state information of the signal machine and inputting the collected data into the data processing; the data processing module processes the data acquired by the data acquisition module and inputs the processed data to the main control module; the main control module receives the processed data, analyzes and judges, analyzes the fault type and reason and generates a fault message if fault information exists, and simultaneously sends an automatic positioning instruction to the GPS positioning module and sends information to a host for sending a traffic signal instruction through the GPRS wireless communication module; the host controls the fault traffic signal machine to flicker the yellow traffic signal lamp, and the flicker frequency is different from the flicker frequency of the yellow traffic signal machine when the traffic signal machine normally works; the GPS positioning module automatically positions and then transmits the position information to the main control module, and the main control module transmits the fault message and the position information to a monitoring center through the GPRS wireless communication module and sends an alarm short message to the mobile phone terminal; the maintenance staff of the traffic signal machine can timely arrive at the fault location through the GPS positioning information, and quickly and accurately determine the fault signal machine according to the traffic signal machine which observes the flashing frequency of a yellow light or completely extinguished of a signal light on site, and quickly remove the fault according to the fault reason; after the fault processing is finished, the main control module sends normal recovery information and position information to the monitoring terminal through the GPRS wireless communication module; meanwhile, the main control module stores the fault information, the fault information is periodically sent to the monitoring terminal through the GPRS wireless communication module, and a manager maintains the traffic signal according to the frequency of fault occurrence, the fault type and the fault reason, so that the fault frequency of the traffic signal is reduced.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (6)
1. A traffic signal machine network monitoring system is characterized by comprising a monitoring terminal, a main control module, a power supply module, a voltage stabilizing module, a data acquisition module, a data processing module, a GPRS wireless communication module and a GPS positioning module;
the main control module is connected with the data acquisition module, the data processing module, the GPRS wireless communication module and the GPS positioning module; the output end of the power supply module is connected with the input end of the voltage stabilizing module, and the output end of the voltage stabilizing module is respectively connected with the main control module, the data acquisition module, the data processing module, the GPRS wireless communication module and the GPS positioning module; the output end of the data acquisition module is connected with the input end of the data processing module; the main control module is also communicated with a host used for sending traffic signal instructions through the GPRS wireless communication module.
2. The traffic signal network monitoring system of claim 1, wherein a dual time limit watchdog circuit is further coupled to the master control module.
3. The traffic signal network monitoring system of claim 1, wherein the data acquisition module comprises a signal input voltage detection module, a signal light output current detection module, and an air switch state detection module.
4. The traffic signal network monitoring system according to claim 1, wherein the data acquisition module is further connected with a photoelectric isolation system.
5. The traffic signal machine network monitoring system according to claim 1, wherein the power supply module includes a mains supply connection module and a storage battery connection module, the mains supply connection module and the storage battery connection module can be switched with each other, and the storage battery is automatically switched to supply power when a mains supply is powered off.
6. The network monitoring system of claim 1, wherein the main control module sends a message to a host for sending traffic signal commands through the GPRS wireless communication module after detecting the fault message, and the host controls the fault traffic signal to flash a yellow traffic signal light with a frequency different from a flashing frequency of the yellow traffic signal light when the traffic signal normally operates.
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| CN201911040913.5A CN110728854A (en) | 2019-10-30 | 2019-10-30 | Traffic signal machine network monitoring system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110942654A (en) * | 2020-02-19 | 2020-03-31 | 维特瑞交通科技有限公司 | Standby machine for monitoring annunciator |
| CN111294557A (en) * | 2020-02-07 | 2020-06-16 | 佛山市先行科技有限公司 | Traffic flow collecting and monitoring system |
| CN111554108A (en) * | 2020-04-30 | 2020-08-18 | 深圳市金溢科技股份有限公司 | Traffic signal lamp display method, vehicle-mounted unit, road side unit and system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008012949A1 (en) * | 2008-03-06 | 2009-09-10 | Tiberius Dacher | Global positioning system controlled system for road map, route management and control, produces data written into internal memory of system and transmitted to web portal via general packet radio service protocol after determined criteria |
| CN104077922A (en) * | 2014-07-02 | 2014-10-01 | 杭州鼎鹏交通科技有限公司 | System and method for automatically detecting and processing fault of traffic signal lamp |
| CN106327904A (en) * | 2015-07-10 | 2017-01-11 | 褚秀清 | Fault detection system of traffic signal lamp |
| CN205983857U (en) * | 2015-12-18 | 2017-02-22 | 天津通翔智能交通系统有限公司 | Road traffic signal lamp fault monitoring device |
| CN107016844A (en) * | 2017-05-19 | 2017-08-04 | 曲阜师范大学 | The fault detect of intelligent standby cable channel and cleaning system based on GPRS |
| CN206946230U (en) * | 2016-12-26 | 2018-01-30 | 上海澳星照明电器制造有限公司 | Data signal acquisition terminal |
| CN208969839U (en) * | 2018-08-23 | 2019-06-11 | 南昌师范高等专科学校 | A kind of traffic monitor communicated based on video detection and GPRS |
-
2019
- 2019-10-30 CN CN201911040913.5A patent/CN110728854A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008012949A1 (en) * | 2008-03-06 | 2009-09-10 | Tiberius Dacher | Global positioning system controlled system for road map, route management and control, produces data written into internal memory of system and transmitted to web portal via general packet radio service protocol after determined criteria |
| CN104077922A (en) * | 2014-07-02 | 2014-10-01 | 杭州鼎鹏交通科技有限公司 | System and method for automatically detecting and processing fault of traffic signal lamp |
| CN106327904A (en) * | 2015-07-10 | 2017-01-11 | 褚秀清 | Fault detection system of traffic signal lamp |
| CN205983857U (en) * | 2015-12-18 | 2017-02-22 | 天津通翔智能交通系统有限公司 | Road traffic signal lamp fault monitoring device |
| CN206946230U (en) * | 2016-12-26 | 2018-01-30 | 上海澳星照明电器制造有限公司 | Data signal acquisition terminal |
| CN107016844A (en) * | 2017-05-19 | 2017-08-04 | 曲阜师范大学 | The fault detect of intelligent standby cable channel and cleaning system based on GPRS |
| CN208969839U (en) * | 2018-08-23 | 2019-06-11 | 南昌师范高等专科学校 | A kind of traffic monitor communicated based on video detection and GPRS |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111294557A (en) * | 2020-02-07 | 2020-06-16 | 佛山市先行科技有限公司 | Traffic flow collecting and monitoring system |
| CN110942654A (en) * | 2020-02-19 | 2020-03-31 | 维特瑞交通科技有限公司 | Standby machine for monitoring annunciator |
| CN111554108A (en) * | 2020-04-30 | 2020-08-18 | 深圳市金溢科技股份有限公司 | Traffic signal lamp display method, vehicle-mounted unit, road side unit and system |
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Application publication date: 20200124 |