CN114441990B - Electric leakage detection device and method for traffic signal machine - Google Patents
Electric leakage detection device and method for traffic signal machine Download PDFInfo
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- CN114441990B CN114441990B CN202111594459.5A CN202111594459A CN114441990B CN 114441990 B CN114441990 B CN 114441990B CN 202111594459 A CN202111594459 A CN 202111594459A CN 114441990 B CN114441990 B CN 114441990B
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Abstract
The invention discloses a leakage detection device of a traffic signal machine, which comprises: the main processor, the lamp group current detection circuit and the total current leakage detection circuit; the lamp group current detection circuit and the total current leakage detection circuit are respectively connected with the main processor in a communication way; the main processor generates a signal lamp lighting command and sends the signal lamp lighting command to the lamp group current detection circuit; the lamp group current detection circuit obtains an effective current value according to the received signal lamp lighting command and sends the effective current value to the main processor; the total current leakage detection circuit determines the leakage current effective value of the current power supply total power supply and sends the leakage current effective value to the main processor; the main processor comprises a leakage judging module, and the leakage judging module determines whether the traffic signal is leaked according to the received parameters. Because the hardware circuit and the software module are integrated together, the system can determine whether the traffic signal is leaked or not under the condition that other detection equipment is not additionally arranged, so that the complexity of the system is reduced, and the detection efficiency is improved.
Description
Technical Field
The invention relates to the technical field of traffic junction safety, in particular to a device and a method for detecting electric leakage of a traffic signal.
Background
The fault investigation of the road traffic signal is always the main work of the maintenance of the signal, the fault point is rapidly positioned in the practical application, the greatest convenient condition can be provided for the investigation work, the proportion of faults caused by the electric leakage of the signal in the fault investigation in the practical application is large, because the signal lamp controlled by the signal control system is generally more than ten lamps, the problem of electric leakage can be any, and each link is separately and independently investigated, so that the rapid recovery on site is difficult, and the road traffic is influenced.
The existing signal machine faults caused by electric leakage, such as power failure, are generally checked by adopting personnel experience, and independent disconnection test is carried out on each lamp group link until a cable or a lamp group which causes the electric leakage is found out so as to be replaced or repaired, or electric leakage detection auxiliary equipment is added on each lamp group link, the electric leakage condition is monitored in real time, electric leakage fault positioning is carried out, the electric leakage is difficult to check, the electric leakage can be detected in a single way, the efficiency is improved, the design complexity of the system is greatly improved, the cost is increased, and the fault maintenance of the part is also increased, so that the electric leakage detection efficiency is reduced.
Disclosure of Invention
The embodiment of the application provides a device and a method for detecting electric leakage of a traffic signal. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
In a first aspect, an embodiment of the present application provides an electric leakage detection device of a traffic signal, where the device includes:
the main processor, the lamp group current detection circuit and the total current leakage detection circuit; wherein, the liquid crystal display device comprises a liquid crystal display device,
the lamp group current detection circuit and the total current leakage detection circuit are respectively connected with the main processor in a communication way; wherein, the liquid crystal display device comprises a liquid crystal display device,
the main processor is used for generating a signal lamp lighting command and sending the signal lamp lighting command to the lamp group current detection circuit;
the lamp group current detection circuit is used for detecting a target current value and a lighting state of a lamp on a target link according to the received signal lamp lighting command, obtaining an effective current value according to the target current value and sending the effective current value and the lighting state of the target link to the main processor;
the total current leakage detection circuit is used for detecting whether the current of alternating current in the current power supply total power supply is balanced or not, determining the effective value of the leakage current of the current power supply total power supply when the current is unbalanced, and sending the effective value of the leakage current to the main processor;
the main processor comprises a leakage judging module; wherein, the liquid crystal display device comprises a liquid crystal display device,
the leakage judging module is used for judging whether the traffic signal is leaked or not according to the received leakage current effective value; when no leakage exists, a change curve graph of a target link current value is obtained according to the received effective current value; and when the leakage occurs, determining the specific position of the leakage of the target link according to the effective current value.
Optionally, the lamp group current detection circuit comprises a first micro control unit, a switch feedback detection unit, an electronic switch control unit, a hall current detection unit, an electronic switch set, a lamp group and a power supply; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first micro-control unit, the switch feedback detection unit, the electronic switch control unit, the Hall current detection unit, the electronic switch set, the power supply and the lamp group are electrically connected.
Optionally, the first micro-control unit includes a lamp group current detection module; wherein, the liquid crystal display device comprises a liquid crystal display device,
the lamp group current detection module is used for establishing communication with the main processor, determining an electronic switch identifier on a target link to be started from the electronic switch set according to a received signal lamp lighting command, and sending the electronic switch identifier to the electronic switch control unit;
the electronic switch control unit is used for closing the corresponding electronic switch according to the received electronic switch identification;
the switch feedback detection unit is used for judging whether an electronic switch corresponding to the electronic switch identifier on the target link is closed or not, and sending a judgment result to the first micro-control unit, wherein the first micro-control unit determines the current lighting state according to the judgment result;
the electronic switches are in one-to-one correspondence with the lamps in the lamp group and are used for controlling the lamps with different colors on the lamp group to be lightened;
the Hall current detection unit is used for acquiring a target current value according to a set sampling period and sending the target current value to the first micro control unit;
the power supply is used for supplying power;
and the lamp group current detection module is used for calculating the effective current value of the target link according to the received target current value.
Optionally, the first micro-control unit is further configured to send the effective current value and the current lighting state to the main processor.
Optionally, the total current leakage detection circuit comprises a second micro control unit, an AD detection circuit, a shaping amplifying circuit, a collecting circuit, a zero sequence current sensor, a power supply and a lamp group set; wherein, the liquid crystal display device comprises a liquid crystal display device,
the second micro control unit, the AD detection circuit, the shaping amplifying circuit, the acquisition circuit, the zero sequence current sensor, the power supply and the lamp set are electrically connected; wherein, the liquid crystal display device comprises a liquid crystal display device,
the zero sequence current sensor is used for judging whether the current of alternating current in the current power supply main power supply is balanced or not, determining leakage current when the current is unbalanced, and obtaining a leakage current effective value after the leakage current sequentially passes through the acquisition circuit, the shaping amplifying circuit, the AD detection circuit and the second micro-control unit;
the second micro control unit is used for feeding back the effective value of the leakage current to the leakage judging module in real time.
Optionally, judging whether the traffic signal generates electric leakage according to the received effective value of the electric leakage current, including:
when the effective value of the leakage current is 0, judging that the traffic signal does not generate leakage;
or alternatively, the process may be performed,
and when the effective value of the leakage current is not 0, judging that the traffic signal machine has leakage.
Optionally, according to the received effective current value, a change curve of the target link current value includes:
judging whether the received effective current value is stored or not;
if not, sampling the target current value of the target link for a plurality of times according to the preset sampling frequency to obtain a plurality of effective current values;
calculating the average value of a plurality of effective current values, determining the average value as a reference value, marking the reference value according to the link code of the target link, and storing;
when the reference value exists, marking the received lighted lamp corresponding to the lighted state as a fault-free lamp, and recording the received effective current value in real time to obtain a change curve chart of the target link current value.
Optionally, determining the specific position of the target link leakage according to the effective current value includes:
the leakage judging module is also used for determining a current lighted link code according to the received lighting state when leakage occurs, marking the lighted lamp corresponding to the lighting state as a suspected leakage fault lamp, and counting the suspected leakage fault lamp into a preset pre-judging maintenance table;
determining the link code of each suspected leakage fault lamp in the preset judging and maintaining table;
inquiring a reference value corresponding to the link code of each suspected leakage fault lamp;
and determining whether the lamp is a leakage fault lamp according to the received effective current value and the reference value.
Optionally, determining whether the lamp is a leakage fault lamp according to the received effective current value and the reference value includes:
determining whether the received effective current value is within a preset error interval according to the reference value;
if yes, determining that the lamp corresponding to the effective current value is a leakage fault lamp;
if not, the lamp corresponding to the effective current value is determined not to be the leakage fault lamp.
In a second aspect, an embodiment of the present application provides a method for detecting an electric leakage of a traffic signal, where the method includes:
the main processor generates a signal lamp lighting command and sends the signal lamp lighting command to the lamp group current detection circuit;
the lamp group current detection circuit detects a target current value and a lighting state of a lamp on a target link according to the received signal lamp lighting command, obtains an effective current value according to the target current value, and sends the effective current value and the lighting state of the target link to the main processor;
the total current leakage detection circuit detects whether the current of alternating current in the current power supply total power supply is balanced or not, determines the effective value of the leakage current of the current power supply total power supply when the current is unbalanced, and sends the effective value of the leakage current to the main processor;
wherein the main processor comprises a leakage judging module,
the electric leakage judging module judges whether the traffic signal machine has electric leakage or not according to the received electric leakage current effective value; when no leakage exists, a change curve graph of a target link current value is obtained according to the received effective current value; and when the leakage occurs, determining the specific position of the leakage of the target link according to the effective current value.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects:
in the embodiment of the application, a leakage detection device of a traffic signal machine firstly generates a signal lamp lighting command through a main processor and sends the signal lamp lighting command to a lamp group current detection circuit, then the lamp group current detection circuit detects a target current value and a lighting state of a lamp on a target link according to the received signal lamp lighting command, obtains an effective current value according to the target current value, sends the effective current value and the lighting state of the target link to the main processor, then the total current leakage detection circuit detects whether the current of alternating current in a current power supply total power supply is balanced or not, determines a leakage current effective value of the current power supply total power supply when the current is unbalanced, and sends the leakage current effective value to the main processor; the main processor comprises a leakage judging module; finally, judging whether the traffic signal is leaked or not by adopting a leakage judging module according to the received leakage current effective value; when no leakage exists, a change curve graph of a target link current value is obtained according to the received effective current value; and when the leakage occurs, determining the specific position of the leakage of the target link according to the effective current value. Because the hardware circuit and the software module are integrated together, the system can determine whether the traffic signal machine leaks under the condition that other detection equipment is not additionally arranged, so that the complexity of the system is reduced, meanwhile, when the electricity leakage condition occurs, the specific position of the leakage link can be rapidly positioned, on-site maintenance personnel can rapidly check the signal machine fault caused by the leakage problem according to a change curve chart generated by history, thereby greatly improving the judgment and positioning of the equipment leakage link and rapidly recovering the on-site equipment.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of a leakage detection device of a traffic signal provided in an embodiment of the present application;
fig. 2 is a schematic diagram of a lamp set current detection circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a processing procedure of a lamp set current detection circuit according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a total current leakage detection circuit according to an embodiment of the present disclosure;
fig. 5 is a schematic flow chart of a method for detecting electric leakage of a traffic signal according to an embodiment of the present application;
fig. 6 is a schematic process diagram of a leakage detection process of a traffic signal according to an embodiment of the present application.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them.
It should be understood that the described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention as detailed in the accompanying claims.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present invention, unless otherwise indicated, "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
The application provides a device and a method for detecting electric leakage of a traffic signal machine, which are used for solving the problems existing in the related technical problems. In the technical scheme provided by the application, because the hardware circuit and the software module are integrated together, the system is enabled to determine whether the traffic signal machine is leaked under the condition that other detection equipment is not additionally arranged, so that the complexity of the system is reduced, meanwhile, when the electric leakage condition occurs, the specific position of the electric leakage link can be rapidly positioned, on-site maintenance personnel can rapidly check the signal machine fault caused by the electric leakage problem according to the change curve chart generated by history, thereby greatly improving the judgment and positioning of the electric leakage link of the equipment, rapidly recovering the on-site equipment, and adopting the exemplary embodiment to carry out detailed description below.
Referring to fig. 1, a schematic structural diagram of a leakage detection device of a traffic signal is provided in an embodiment of the present application. As shown in fig. 1, the apparatus includes: the main processor, the lamp group current detection circuit and the total current leakage detection circuit; the lamp set current detection circuit and the total current leakage detection circuit are respectively connected with the main processor in a communication way; the main processor is used for generating a signal lamp lighting command and sending the signal lamp lighting command to the lamp group current detection circuit; the lamp group current detection circuit is used for detecting a target current value and a lighting state of a lamp on a target link according to the received signal lamp lighting command, obtaining an effective current value according to the target current value and sending the effective current value and the lighting state of the target link to the main processor; the total current leakage detection circuit is used for detecting whether the current of alternating current in the current power supply total power supply is balanced or not, determining the effective value of the leakage current of the current power supply total power supply when the current is unbalanced, and sending the effective value of the leakage current to the main processor; the main processor comprises a leakage judging module; the leakage judging module is used for judging whether the traffic signal machine has leakage or not according to the received leakage current effective value; when no leakage exists, a change curve graph of a target link current value is obtained according to the received effective current value; and when the leakage occurs, determining the specific position of the leakage of the target link according to the effective current value.
In this embodiment, for example, as shown in fig. 2, the lamp group current detection circuit includes a first micro control unit, a switch feedback detection unit, an electronic switch control unit, a hall current detection unit, an electronic switch set, a lamp group, and a power supply; the first micro-control unit, the switch feedback detection unit, the electronic switch control unit, the Hall current detection unit, the electronic switch set, the power supply and the lamp set are electrically connected.
Specifically, the first micro-control unit comprises a lamp set current detection module; the system comprises a main processor, a lamp group current detection module, an electronic switch control unit, a signal lamp lighting command and a signal lamp lighting command, wherein the lamp group current detection module is used for establishing communication with the main processor, determining an electronic switch identification on a target link to be started from an electronic switch set according to the received signal lamp lighting command, and sending the electronic switch identification to the electronic switch control unit; the electronic switch control unit is used for closing the corresponding electronic switch according to the received electronic switch identification; the switch feedback detection unit is used for judging whether an electronic switch corresponding to the electronic switch identifier on the target link is closed or not, and sending a judgment result to the first micro-control unit, wherein the first micro-control unit determines the current lighting state according to the judgment result; the electronic switches are in one-to-one correspondence with the lamps in the lamp group and are used for controlling the lamps with different colors on the lamp group to be lightened; the Hall current detection unit is used for acquiring a target current value according to a set sampling period and sending the target current value to the first micro control unit; the power supply is used for supplying power; and the lamp group current detection module is used for calculating the effective current value of the target link according to the received target current value.
It should be noted that, the lamp group current detection circuit adopts a common hall current detection unit of a lamp group, the alternating current live wire is respectively controlled by 3 electronic switch thyristors after passing through the hall sensor, an optocoupler detection level is adopted after switching, 220V voltage is generated after the electronic switch is turned on, so that the switch is judged to be turned on, and the three switches respectively control three signal lamps of red, yellow and green, and then the zero line is common, and the principle of a group of lamps is shown. The traffic light control can turn on any one of the three lamps in a time-sharing manner, and when one of the three lamps is turned on and the other lamps are turned off, the detected current is the link target current value for turning on the lamps.
In one possible implementation manner, for example, as shown in fig. 3, after the lamp group current detection module in the first micro-control unit in the lamp group current detection circuit is powered on, the sampling frequency of the current is set first, the lamp group current detection module communicates with the main control program in the main processor, after communication, a lighting command from the main processor is received, the lamp group current detection module controls to open a certain link electronic switch specified on the lamp group current detection circuit according to the lighting command, and detects the level after the electronic switch through the switch feedback detection unit to confirm that the electronic switch has been opened, the first micro-control unit determines the current lighting state to be the lighting state, so as to determine the current detected currently as to be the link target current value to be opened, at this time, the target current value is obtained according to the set sampling period, the collected alternating current value is calculated, the effective current value of the lamp control link is calculated, and the effective current value and the switch state are sent to the main control program together according to the communication protocol, so as to provide the lighting state and the effective current value of the current for the main control program.
In this embodiment of the present application, the first micro-control unit is further configured to send the effective current value and the current lighting state to the main processor.
In this embodiment, for example, as shown in fig. 4, the total current leakage detection circuit includes a second micro control unit, an AD detection circuit, a shaping amplifying circuit, an acquisition circuit, a zero sequence current sensor, a power supply, and a light group set; the second micro control unit, the AD detection circuit, the shaping amplifying circuit, the acquisition circuit, the zero sequence current sensor, the power supply and the lamp set are electrically connected; the zero sequence current sensor is used for judging whether the current of alternating current in the current power supply is balanced or not, determining leakage current when the current is unbalanced, and obtaining a leakage current effective value after the leakage current sequentially passes through the acquisition circuit, the shaping amplifying circuit, the AD detection circuit and the second micro control unit; the second micro control unit is used for feeding back the effective value of the leakage current to the leakage judging module in real time.
The total current leakage detection circuit is a total electric loop of the whole lighting power supply system, detects the leakage current of the whole power supply, adopts a zero-sequence current sensor, the live wire L and the zero wire N of 220VAC of the power supply system simultaneously pass through the zero-sequence current sensor, and the power supply at the rear end of the zero-sequence current sensor respectively supplies power to each lamp group link. When no leakage occurs, the vector sum of the currents flowing in and out of the zero sequence current sensor is balanced, the zero sequence current sensor has no voltage output, and no leakage current is generated. When any link is leaked, vector sum of in-out current flowing through the zero sequence current sensor is unbalanced, the zero sequence current sensor senses leakage current, then voltage signals are sent to the AD detection circuit through the acquisition circuit and the shaping amplifying circuit after amplification treatment, and the second micro control unit calculates effective values of alternating current signals through the detected proportional current values, so that effective values of leakage current are calculated.
Specifically, when judging whether the traffic signal is leaked according to the received leakage current effective value, judging that the traffic signal is not leaked when the leakage current effective value is 0; or when the effective value of the leakage current is not 0, judging that the traffic signal machine has leakage.
Specifically, when no leakage occurs, when a change curve graph of a target link current value is obtained according to a received effective current value, firstly judging whether the received effective current value is stored; if not, sampling the target current value of the target link for a plurality of times according to the preset sampling frequency to obtain a plurality of effective current values; and calculating the average value of the plurality of effective current values, determining the average value as a reference value, marking the reference value according to the link code of the target link, storing the reference value, marking the received lighted lamp corresponding to the lighting state as a fault-free lamp when the reference value exists, recording the received effective current value in real time, and obtaining a change curve graph of the current value of the target link. Specifically, when the electric leakage occurs, the electric leakage judging module is further configured to determine a current link code according to the received lighting state, mark the lighting lamp corresponding to the lighting state as a suspected electric leakage fault lamp, count the suspected electric leakage fault lamp into a preset maintenance table, determine the link code of each suspected electric leakage fault lamp in the preset maintenance table, query a reference value corresponding to the link code of each suspected electric leakage fault lamp, and finally determine whether the lamp is the electric leakage fault lamp according to the received effective current value and the received reference value.
Specifically, when determining whether the lamp is a leakage fault lamp according to the received effective current value and the reference value, determining whether the received effective current value is in a preset error interval according to the target reference value; if yes, determining that the lamp corresponding to the effective current value is a leakage fault lamp; if not, the lamp corresponding to the effective current value is determined not to be the leakage fault lamp.
In the embodiment of the application, a leakage detection device of a traffic signal machine firstly generates a signal lamp lighting command through a main processor and sends the signal lamp lighting command to a lamp group current detection circuit, then the lamp group current detection circuit detects a target current value and a lighting state of a lamp on a target link according to the received signal lamp lighting command, obtains an effective current value according to the target current value, sends the effective current value and the lighting state of the target link to the main processor, then the total current leakage detection circuit detects whether the current of alternating current in a current power supply total power supply is balanced or not, determines a leakage current effective value of the current power supply total power supply when the current is unbalanced, and sends the leakage current effective value to the main processor; the main processor comprises a leakage judging module; finally, judging whether the traffic signal is leaked or not by adopting a leakage judging module according to the received leakage current effective value; when no leakage exists, a change curve graph of a target link current value is obtained according to the received effective current value; and when the leakage occurs, determining the specific position of the leakage of the target link according to the effective current value. Because the hardware circuit and the software module are integrated together, the system can determine whether the traffic signal is leaked under the condition that other detection equipment is not additionally arranged, so that the complexity of the system is reduced, meanwhile, when the leakage condition occurs, the specific position of a leakage link can be determined, meanwhile, the signal failure caused by the leakage problem can be rapidly eliminated according to a change curve chart generated by history, and therefore the judgment and positioning of the equipment leakage link are greatly improved, and the field equipment is rapidly recovered.
Referring to fig. 5, a flow chart of a method for detecting electric leakage of a traffic signal according to an exemplary embodiment of the invention is shown. The method comprises the following steps:
s101, a main processor generates a signal lamp lighting command and sends the signal lamp lighting command to a lamp group current detection circuit;
s102, a lamp group current detection circuit detects a target current value and a lighting state of a lamp on a target link according to the received signal lamp lighting command, obtains an effective current value according to the target current value, and sends the effective current value and the lighting state of the target link to a main processor;
s103, a total current leakage detection circuit detects whether the current of alternating current in the current power supply total power supply is balanced or not, and when the current is unbalanced, the leakage current effective value of the current power supply total power supply is determined and sent to a main processor;
s104, the main processor comprises a leakage judging module; the electric leakage judging module judges whether the traffic signal machine has electric leakage or not according to the received electric leakage current effective value; when no leakage exists, a change curve graph of a target link current value is obtained according to the received effective current value; and when the leakage occurs, determining the specific position of the leakage of the target link according to the effective current value.
Specifically, when judging whether the traffic signal is leaked according to the received leakage current effective value, firstly judging that the traffic signal is not leaked when the leakage current effective value is 0; or when the effective value of the leakage current is not 0, judging that the traffic signal machine has leakage.
Specifically, when a change curve graph of a target link current value is obtained according to a received effective current value, firstly judging whether the received effective current value is stored, if not, sampling the target current value of the target link for multiple times according to a preset sampling frequency to obtain multiple effective current values, then calculating the average value of the multiple effective current values, determining the average value as a reference value, marking the reference value according to the link code of the target link, storing, and finally when the reference value exists, marking the lighted lamp corresponding to the received lighting state as a fault-free lamp, recording the received effective current value in real time, and obtaining the change curve graph of the target link current value.
Specifically, when a specific position of a target link leakage is determined according to an effective current value, firstly, when the leakage occurs, a leakage judging module determines a current lighted link code according to a received lighting state, marks a lighted lamp corresponding to the lighting state as a suspected leakage fault lamp, counts the suspected leakage fault lamp into a preset judging maintenance table, then determines the link code of each suspected leakage fault lamp in the preset judging maintenance table, secondly, inquires a reference value corresponding to the link code of each suspected leakage fault lamp, and finally, determines whether the lamp is the leakage fault lamp according to the received effective current value and the reference value.
Specifically, when judging whether the lamp is a leakage fault lamp according to the received effective current value and the reference value, firstly determining whether the received effective current value is in a preset error interval according to the reference value; if yes, determining that the lamp corresponding to the effective current value is a leakage fault lamp; if not, the lamp corresponding to the effective current value is determined not to be the leakage fault lamp.
In one possible implementation manner, for example, as shown in fig. 6, fig. 6 is a schematic block diagram illustrating a process of an electric leakage detection procedure of a traffic signal provided in the present application, firstly, a main processor sends a signal lamp lighting command to a lamp group current detection circuit, and receives an effective current value and a lighting state from the lamp group current detection circuit, then determines an electric leakage current effective value of a current power supply total power supply from the total current electric leakage detection circuit, determines whether an electric leakage fault exists according to the electric leakage current effective value, and when electric leakage occurs, the electric leakage current effective value is not 0, so as to determine whether electric leakage occurs in all the currently issued lighted lamps. If not, judging whether the normal effective current value of the system lighting is stored, if not, sampling the effective current value of the normal link for a plurality of times under the condition of no electric leakage, calculating an average value of the normal lighting after sampling the current value of each path for a plurality of times, recording the average value in the system, and marking the average value as a reference value of the current value for the rear logic to judge the electric leakage.
If the current reference value is recorded under the condition that no electric leakage exists, a current lighting command is acquired at the moment, the current lighting lamp does not generate electric leakage phenomenon, the current lighting lamp is marked as a fault-free lamp, the current effective current value is recorded, a current real-time monitoring curve is formed, and the current change curve of each link is recorded at any time, so that a change curve of the current value of the link is formed, a checking basis is provided for current large caused by subsequent cable ageing, and hidden danger fault judgment checking is facilitated.
If the system finds that leakage current is generated, the current-lighted link code is obtained at the moment, the lighted lamp at the moment is marked as a fault lamp mark with possible leakage current, the fault lamp mark is recorded in a faulty pre-judging maintenance table, then the marked fault lamp is further screened and checked, because a plurality of lamps are lighted at the same time when the leakage fault is generated, the specific lamp link with the leakage fault still needs to be further screened and positioned according to a historical record value, the normal current value of the corresponding link recorded when the fault does not happen before is inquired according to the code which is already listed as the fault mark link, namely a reference value, whether the current value of the link collected when the leakage occurs is in an error range or not is judged, if the current value is larger than the normal record value, the link is indicated to have the leakage current risk, and the leakage link fault is recorded. If the current leakage fault pre-judging mark is not larger than the current leakage fault pre-judging mark of the link within the normal range, and all the links with possible problems of the pre-judging mark are circularly checked, so that the lamp with the current leakage fault of one or more links is finally positioned, and the rapid checking and positioning are provided for the current leakage fault. The function always monitors and checks the leakage link in real time in the system, even if the leakage is excessive to cause the system to lose power, the data in the checking process can still be checked after the system is started, and the located problematic range link can also be provided, so that the workload of checking the line is reduced.
In the embodiment of the application, a leakage detection device of a traffic signal machine firstly generates a signal lamp lighting command through a main processor and sends the signal lamp lighting command to a lamp group current detection circuit, then the lamp group current detection circuit detects a target current value and a lighting state of a lamp on a target link according to the received signal lamp lighting command, obtains an effective current value according to the target current value, sends the effective current value and the lighting state of the target link to the main processor, then the total current leakage detection circuit detects whether the current of alternating current in a current power supply total power supply is balanced or not, determines a leakage current effective value of the current power supply total power supply when the current is unbalanced, and sends the leakage current effective value to the main processor; the main processor comprises a leakage judging module; finally, judging whether the traffic signal is leaked or not by adopting a leakage judging module according to the received leakage current effective value; when no leakage exists, a change curve graph of a target link current value is obtained according to the received effective current value; and when the leakage occurs, determining the specific position of the leakage of the target link according to the effective current value. Because the hardware circuit and the software module are integrated together, the traffic signal machine is determined whether electric leakage occurs under the condition that other detection equipment is not additionally arranged, the complexity of the system is reduced, meanwhile, when the electric leakage occurs, the specific position of the electric leakage link can be rapidly positioned, meanwhile, on-site maintenance personnel can rapidly arrange signal machine faults caused by the electric leakage problem according to a change curve chart generated by history, thereby greatly improving the judgment and positioning of the electric leakage link of equipment and rapidly recovering on-site equipment.
The invention also provides a computer readable medium, on which program instructions are stored, which when executed by a processor, implement the method for detecting electric leakage of a traffic signal provided by the above method embodiments.
The invention also provides a computer program product containing instructions which, when run on a computer, cause the computer to perform the method for detecting electric leakage of the traffic signal according to the above method embodiments.
Those skilled in the art will appreciate that implementing all or part of the above-described methods in the embodiments may be accomplished by computer programs to instruct related hardware, and the program for detecting the electric leakage of the traffic signal may be stored in a computer readable storage medium, and the program may include the steps of the embodiments of the above-described methods when executed. The storage medium may be a magnetic disk, an optical disk, a read-only memory, a random access memory, or the like.
The foregoing disclosure is only illustrative of the preferred embodiments of the present application and is not intended to limit the scope of the claims herein, as the equivalent of the claims herein shall be construed to fall within the scope of the claims herein.
Claims (9)
1. An electrical leakage detection device for a traffic signal, the device comprising:
the main processor, the lamp group current detection circuit and the total current leakage detection circuit; wherein, the liquid crystal display device comprises a liquid crystal display device,
the lamp set current detection circuit and the total current leakage detection circuit are respectively connected with the main processor in a communication way; wherein, the liquid crystal display device comprises a liquid crystal display device,
the main processor is used for generating a signal lamp lighting command and sending the signal lamp lighting command to the lamp group current detection circuit;
the lamp group current detection circuit is used for detecting a target current value and a lighting state of a lamp on a target link according to the received signal lamp lighting command, obtaining an effective current value according to the target current value, and sending the effective current value and the lighting state of the target link to the main processor;
the total current leakage detection circuit is used for detecting whether the current of alternating current in the current power supply total power supply is balanced or not, determining the effective value of the leakage current of the current power supply total power supply when the current is unbalanced, and sending the effective value of the leakage current to the main processor;
the main processor comprises a leakage judging module; wherein, the liquid crystal display device comprises a liquid crystal display device,
the leakage judging module is used for judging whether the traffic signal is leaked or not according to the received leakage current effective value; when no leakage exists, a change curve graph of a target link current value is obtained according to the received effective current value; when the leakage occurs, determining the specific position of the leakage of the target link according to the effective current value;
the determining the specific position of the target link leakage according to the effective current value comprises the following steps:
the leakage judging module is further used for determining a current lighted link code according to the received lighting state when leakage occurs, marking the lighted lamp corresponding to the lighting state as a suspected leakage fault lamp, and counting the suspected leakage fault lamp into a preset pre-judging maintenance table;
determining the link code of each suspected leakage fault lamp in the preset judging and maintaining table;
inquiring a reference value corresponding to the link code of each suspected leakage fault lamp;
and determining whether the lamp is a leakage fault lamp according to the received effective current value and the reference value.
2. The electric leakage detecting device of a traffic signal according to claim 1, wherein,
the lamp set current detection circuit comprises a first micro-control unit, a switch feedback detection unit, an electronic switch control unit, a Hall current detection unit, an electronic switch set, a lamp set and a power supply; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first micro-control unit, the switch feedback detection unit, the electronic switch control unit, the Hall current detection unit, the electronic switch set, the power supply and the lamp group are electrically connected.
3. The electric leakage detecting device of traffic signal according to claim 2, wherein,
the first micro-control unit comprises a lamp group current detection module; wherein, the liquid crystal display device comprises a liquid crystal display device,
the lamp set current detection module is used for establishing communication with the main processor, determining an electronic switch identifier on a target link to be started from the electronic switch set according to the received signal lamp lighting command, and sending the electronic switch identifier to the electronic switch control unit;
the electronic switch control unit is used for closing the corresponding electronic switch according to the received electronic switch identification;
the switch feedback detection unit is used for judging whether an electronic switch corresponding to the electronic switch identifier on the target link is closed or not, sending a judgment result to the first micro-control unit, and determining the current lighting state according to the judgment result by the first micro-control unit;
the electronic switches are in one-to-one correspondence with the lamps in the lamp group and are used for controlling the lamps with different colors on the lamp group to be lightened;
the Hall current detection unit is used for acquiring a target current value according to a set sampling period and sending the target current value to the first micro control unit;
the power supply is used for supplying power;
the lamp group current detection module is used for calculating the effective current value of the target link according to the received target current value.
4. The electric leakage detecting device of a traffic signal according to claim 3, wherein,
the first micro-control unit is further configured to send the effective current value and a current lighting state to the main processor.
5. The electric leakage detecting device of a traffic signal according to claim 1, wherein,
the total current leakage detection circuit comprises a second micro control unit, an AD detection circuit, a shaping amplifying circuit, a collecting circuit, a zero sequence current sensor, a power supply and a lamp set; wherein, the liquid crystal display device comprises a liquid crystal display device,
the second micro control unit, the AD detection circuit, the shaping amplifying circuit, the acquisition circuit, the zero sequence current sensor, the power supply and the lamp set are electrically connected; wherein, the liquid crystal display device comprises a liquid crystal display device,
the zero sequence current sensor is used for judging whether the current of alternating current in the current power supply is balanced or not, determining leakage current when the current is unbalanced, and obtaining a leakage current effective value after the leakage current sequentially passes through the acquisition circuit, the shaping amplifying circuit, the AD detection circuit and the second micro control unit;
and the second micro control unit is used for feeding the effective value of the leakage current back to the leakage judging module in real time.
6. The apparatus for detecting leakage of traffic signal according to claim 1, wherein said determining whether the traffic signal has leakage according to the received leakage current effective value comprises:
when the effective value of the leakage current is 0, judging that the traffic signal is not leaked;
or alternatively, the process may be performed,
and when the effective value of the leakage current is not 0, judging that the traffic signal machine has leakage.
7. The leakage detecting device of claim 1, wherein the graph of the change in the target link current value according to the received effective current value comprises:
judging whether the received effective current value is stored or not;
if not, sampling the target current value of the target link for a plurality of times according to a preset sampling frequency to obtain a plurality of effective current values;
calculating the average value of the plurality of effective current values, determining the average value as a reference value, marking the reference value according to the link code of the target link, and storing the marked reference value;
when the reference value exists, marking that the received lighted lamp corresponding to the lighted state is a fault-free lamp, and recording the received effective current value in real time to obtain a change curve chart of a target link current value.
8. The apparatus according to claim 1, wherein the determining whether the traffic signal is a leakage fault lamp based on the received effective current value and the reference value comprises:
determining whether the received effective current value is within a preset error interval according to the reference value;
if yes, determining that the lamp corresponding to the effective current value is a leakage fault lamp;
if not, the lamp corresponding to the effective current value is determined not to be the leakage fault lamp.
9. A method for detecting leakage of a traffic signal, the method comprising:
the main processor generates a signal lamp lighting command and sends the signal lamp lighting command to the lamp group current detection circuit;
the lamp group current detection circuit detects a target current value and a lighting state of a lamp on a target link according to the received signal lamp lighting command, obtains an effective current value according to the target current value, and sends the effective current value and the lighting state of the target link to the main processor;
the total current leakage detection circuit detects whether the current of alternating current in the current power supply total power supply is balanced or not, determines the effective value of the leakage current of the current power supply total power supply when the current is unbalanced, and sends the effective value of the leakage current to the main processor;
wherein the main processor comprises a leakage judging module,
the electric leakage judging module judges whether the traffic signal machine has electric leakage or not according to the received electric leakage current effective value; when no leakage exists, a change curve graph of a target link current value is obtained according to the received effective current value; when the leakage occurs, determining the specific position of the leakage of the target link according to the effective current value; wherein, the liquid crystal display device comprises a liquid crystal display device,
determining the specific position of the target link leakage according to the effective current value comprises the following steps:
the leakage judging module is further used for determining a current lighted link code according to the received lighting state when leakage occurs, marking the lighted lamp corresponding to the lighting state as a suspected leakage fault lamp, and counting the suspected leakage fault lamp into a preset pre-judging maintenance table;
determining the link code of each suspected leakage fault lamp in the preset judging and maintaining table;
inquiring a reference value corresponding to the link code of each suspected leakage fault lamp;
and determining whether the lamp is a leakage fault lamp according to the received effective current value and the reference value.
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| CN105448117A (en) * | 2015-12-22 | 2016-03-30 | 青岛海信网络科技股份有限公司 | Signal machine and signal lamp link electric leakage detection method |
| CN107356883B (en) * | 2017-08-09 | 2023-11-07 | 安徽科力信息产业有限责任公司 | Signal lamp fault detection device and method based on current effective value |
| CN108550270B (en) * | 2018-03-20 | 2020-07-10 | 青岛海信网络科技股份有限公司 | Traffic signal lamp abnormal state processing and returning method and traffic signal lamp |
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| CN113759288B (en) * | 2021-11-08 | 2022-03-11 | 深圳市德兰明海科技有限公司 | Leakage current detection circuit and method and leakage current detector |
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