CN108550270B - Traffic signal lamp abnormal state processing and returning method and traffic signal lamp - Google Patents
Traffic signal lamp abnormal state processing and returning method and traffic signal lamp Download PDFInfo
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- CN108550270B CN108550270B CN201810231400.1A CN201810231400A CN108550270B CN 108550270 B CN108550270 B CN 108550270B CN 201810231400 A CN201810231400 A CN 201810231400A CN 108550270 B CN108550270 B CN 108550270B
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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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- 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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Abstract
The invention discloses a traffic signal lamp abnormal state processing and returning method and a traffic signal lamp. Whether abnormal states such as the same brightness of traffic lights and the non-brightness of the traffic lights occur or not is judged according to the voltage values of the light lines and the current values of the light lines of the traffic lights, the abnormal condition that the same brightness of the traffic lights occurs due to the fact that most of the traffic lights generate electric leakage on an output channel or a light control line can be avoided, and the reliability and the maintainability of the color output of the traffic lights are greatly improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of traffic signal control, in particular to a traffic signal lamp abnormal state processing and returning method and a traffic signal lamp.
Background
In a traffic signal control system, the working stability and reliability of signal lamps are crucial, and once a green lamp is simultaneously lighted (green collision) in a collision direction or a red lamp and a green lamp of the same signal lamp are simultaneously lighted, traffic accidents are easily caused. Therefore, the traffic industry pays attention to the abnormal detection of the signal lamp, and various detection means are provided.
The signal lamps in the existing signal control system are mostly strong current control signal lamps, and the signal lamps are easy to light abnormally due to the conditions of electric leakage, abnormal signal machine output and the like, so that the problems of traffic conflict, traffic light and the like at intersections are caused finally.
Disclosure of Invention
The embodiment of the invention provides a traffic signal lamp, which can avoid the abnormal situation that the signal lamp is simultaneously bright in red and green caused by the electric leakage on the output channel or the lamp control line of a traffic signal machine, and greatly improve the reliability and maintainability of the color output of the signal lamp.
The embodiment of the invention provides a traffic signal lamp abnormal state processing and returning method, which comprises the following steps:
the main controller obtains the voltage value of each lamp wire of the signal lamp and the current value of each lamp holder;
and the main controller processes the abnormal state and sends a pulse signal corresponding to the abnormal state to the relay control end when determining that the signal lamp is in the abnormal state according to the voltage value of each lamp wire of the signal lamp and the current value of each lamp holder.
Optionally, when determining that the signal lamp is in an abnormal state according to the voltage value of each lamp wire of the signal lamp or the current value of each lamp cap, the main controller processes the abnormal state and sends a pulse signal corresponding to the abnormal state to the relay control end, where the method includes:
when the main controller determines that the voltage values of at least two lamp lines are larger than a first voltage threshold value, the main controller judges whether the difference between the voltage values of the at least two lamp lines is larger than a second voltage threshold value, if so, the main controller controls the lamp cap of the signal lamp corresponding to the lamp line with the highest voltage value to be lightened, otherwise, the main controller controls the yellow lamp cap of the signal lamp to be lightened and in a flashing state, and simultaneously sends a pulse signal with a first frequency to the relay control end;
optionally, when determining that the signal lamp is in an abnormal state according to the voltage value of each lamp wire of the signal lamp or the current value of each lamp cap, the main controller processes the abnormal state and sends a pulse signal corresponding to the abnormal state to the relay control end, where the method includes:
and when the main controller determines that the current value of each lamp holder of the signal lamp does not accord with the corresponding control mode, the main controller sends a pulse signal with a second frequency to the relay control end.
Optionally, when determining that the signal lamp is in an abnormal state according to the voltage value of each lamp wire of the signal lamp or the current value of each lamp cap, the main controller processes the abnormal state and sends a pulse signal corresponding to the abnormal state to the relay control end, where the method includes:
and when the main controller determines that the current value of the lighted signal lamp holder is smaller than a first current threshold value, the main controller sends a pulse signal with a third frequency to the relay control end.
Optionally, when determining that the signal lamp is in an abnormal state according to the voltage value of each lamp wire of the signal lamp or the current value of each lamp cap, the main controller processes the abnormal state and sends a pulse signal corresponding to the abnormal state to the relay control end, where the method includes:
and when the main controller determines that the voltage value of each lamp wire is smaller than the first voltage threshold value, the main controller controls all lamp caps of the signal lamp to be closed and sends a pulse signal with a fourth frequency to the relay control end.
Correspondingly, the embodiment of the invention also provides a traffic signal lamp, which comprises: the device comprises a main controller, a voltage detection module, a rectification and energy storage circuit, a power supply module, a signal lamp holder, a driving detection circuit, a relay and a resistance load;
the main controller is used for controlling the lamp holder of the signal lamp to be turned on or off, controlling whether the resistance load is connected or not and obtaining the voltage value and the current value on each signal lamp line;
the voltage detection module is used for collecting voltage values on the lamp wires of the signal lamps and sending the voltage values to the main controller;
the rectification and energy storage circuit is used for rectifying the current value on each signal lamp wire and outputting the current value to a capacitor for energy storage;
the power supply module is used for converting the voltage output by the rectification and energy storage circuit into direct-current voltage to supply power to all components of the signal lamp;
the signal lamp holder and drive detection circuit is used for turning on or off the signal lamp holder under the control of the main controller and sending a current detection value of the signal lamp holder to the main controller;
the relay and the resistance load are used for receiving the control connection load of the main controller and consuming the current of the signal lamp.
Optionally, the voltage detection module includes a voltage acquisition circuit;
the voltage acquisition circuit acquires voltage values on lamp wires of the signal lamps, reduces the voltage values in an equal ratio to a preset voltage range, and sends the voltage values to the main controller.
Optionally, the rectifying and energy storing circuit includes a diode rectifying circuit, a diode and a high-voltage capacitor;
and when the relay is controlled to be conducted by the master controller, part of the current output by the diode rectifying circuit is consumed through the load resistor.
Optionally, the signal lamp holder and driving detection circuit comprises an MOS switch circuit, an L ED lamp driving power supply, a sampling resistor, a signal lamp holder, and an amplification circuit;
the voltage output by the power supply module flows into the L ED lamp driving power supply through the MOS switch circuit, the L ED lamp driving power supply converts the voltage into a voltage signal used by the signal lamp holder, and the converted voltage signal is output to the signal lamp holder through a resistor;
the sampling resistor is connected with the signal lamp holder in series and converts a passing current value into a voltage value, and the amplifying circuit converts the voltages at the two ends of the sampling resistor into voltage signals and sends the voltage signals to the main controller.
The embodiment of the invention shows that the main controller acquires the voltage value of each lamp wire and the current value of each lamp cap of the signal lamp, and then processes the abnormal state and sends a pulse signal corresponding to the abnormal state to the relay control end when determining that the signal lamp is in the abnormal state according to the voltage value of each lamp wire or the current value of each lamp cap of the signal lamp. Whether abnormal states such as the same brightness of traffic lights and the non-brightness of the traffic lights occur or not is judged according to the voltage values of the light lines and the current values of the light lines of the traffic lights, the abnormal condition that the same brightness of the traffic lights occurs due to the fact that most of the traffic lights generate electric leakage on an output channel or a light control line can be avoided, and the reliability and the maintainability of the color output of the traffic lights are greatly improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced 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 based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a traffic signal lamp according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a voltage detection circuit and a rectifying and energy-storing circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a signal lamp holder and a driving detection circuit according to an embodiment of the present invention;
fig. 4 is a schematic flow chart illustrating a traffic signal lamp abnormal state processing and returning method according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of the operation of a traffic signal lamp according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, 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.
Fig. 1 schematically illustrates a structure of a traffic signal lamp according to an embodiment of the present invention, where the traffic signal lamp may include: the device comprises a main controller, a voltage detection module, a rectification and energy storage circuit, a power supply module, a signal lamp cap, a driving detection circuit, a relay and a resistance load.
The main controller is used for controlling the on-off of the lamp caps of the signal lamps, controlling whether a resistance load is connected or not and obtaining the voltage value and the current value of each signal lamp line.
The voltage detection module is used for collecting voltage values on lamp wires of the signal lamps and sending the voltage values to the main controller. The module collects voltages on red light, yellow light and green light lines of the signal lamp, the voltages are sent to the master controller after being processed, and the master controller can obtain voltage signal values on the red light, yellow light and green light lines.
The rectification and energy storage circuit is used for rectifying the current value on each signal lamp wire and outputting the current value to the capacitor for energy storage. The module rectifies the alternating current strong current signals of the red light, the yellow light and the green light, and outputs the rectified signals to a capacitor with larger capacity. Because the condenser can carry out the energy storage, even take place the signal of telecommunication between the lamp line and switch, or the signal of telecommunication on the lamp line short time interrupt, the module can both guarantee to have more stable electric quantity output.
The power supply module is used for converting the voltage output by the rectifying and energy storage circuit into direct current voltage to supply power for all components of the signal lamp, and the direct current/direct current power supply module is used for converting the voltage output by the rectifying and energy storage circuit into direct current voltage to supply power for the main controller, L ED lamp driving and other parts.
The signal lamp cap and the drive detection circuit are used for lighting or extinguishing the signal lamp cap under the control of the main controller and sending a current detection value of the signal lamp cap to the main controller, each group of the part comprises three modules, 1, a signal lamp cap, namely a lamp panel provided with L ED light emitting tubes, is used for realizing red/yellow/green light output, 2, a drive circuit, and 3, a current detection circuit, wherein the part drives L ED lamp cap to light or extinguish under the control of the main controller, and the part is used for detecting the current output of the signal lamp cap and sending the detection value to the main controller.
The relay and the resistance load are used for receiving the control connection load of the main controller and consuming the current of the signal lamp. The part comprises a relay and a resistance load, and when the main controller controls the relay to be conducted, the resistance load can be directly connected to an output network of the rectifying and energy storage circuit, so that a large amount of current is consumed.
Optionally, as shown in fig. 2, the voltage detection module may include a voltage acquisition circuit, where the voltage acquisition circuit acquires voltage values on lamp lines of each signal lamp, reduces the voltage values in an equal ratio to a preset voltage range, and sends the voltage values to the main controller. The rectification and energy storage circuit comprises a diode rectification circuit, a diode and a high-voltage capacitor, wherein a part of current output by the diode rectification circuit is output to the high-voltage capacitor for energy storage after passing through the diode, the other part of current is output to the relay and the resistance load, and when the relay is controlled by the main controller to be conducted, the part of current output by the diode rectification circuit is consumed through the load resistance.
Three groups of lamp control signals (red lamp, yellow lamp and green lamp signals) entering the signal lamp flow back to the diode rectifying circuit to turn over the sine wave type negative half shaft. Before the partial voltage signals are rectified, the voltage acquisition circuit can obtain voltage values of the red light signal, the yellow light signal and the green light signal, the voltage values are reduced in an equal ratio to a voltage range acceptable by the main controller, and the voltage values are sent to the main controller for processing.
The current flowing out of the rectification circuit is finally collected by the diode and flows into a group of high-voltage large-capacity capacitors, and then flows into the power module after being processed by the capacitor group, and is converted into direct-current power supply voltage with a proper voltage value to supply power for each module in the signal lamp.
The capacitor bank has two functions: filtering and storing energy. The energy storage function is that when signals are switched between lamp lines of a signal lamp or short-time voltage interruption such as yellow light flickering and green light flickering is caused, the part can continuously output voltage to the power supply module.
The other part of the current flowing out of the rectifying circuit flows into the relay and the load resistor, and when the relay is controlled by the main controller to be conducted, the load resistor consumes the current value of the part flowing out of the rectifying circuit.
Wherein the diode functions to prevent the capacitor from sourcing current that discharges back through the load resistor.
Optionally, as shown in fig. 3, the signal lamp cap and the driving detection circuit include an MOS switch circuit, an L ED lamp driving power supply, a sampling resistor, a signal lamp cap, and an amplification circuit, where a voltage output by the power module flows into the L ED lamp driving power supply through the MOS switch circuit, the L ED lamp driving power supply converts the voltage into a voltage signal used by the signal lamp cap, the converted voltage signal is output to the signal lamp cap through the adopted resistor, the sampling resistor is connected in series with the signal lamp cap, a value of the passed current is converted into a voltage value, and the amplification circuit converts the voltage at two ends of the adopted resistor into a voltage signal and sends the voltage signal to the master controller.
By the power module, the voltage signal that will have great ripple converts the direct current voltage signal into, and this direct current voltage signal lets in high-power MOS switch circuit earlier, and this MOS switch circuit is controlled by the master controller, and after this MOS switch circuit of master controller control switched on, the direct current voltage signal will flow in L ED lamp drive power supply, converts supply voltage into the voltage signal that is fit for L ED and uses.
The sampling resistor is connected with a power supply interface of the signal lamp holder in series, a flowing current value is converted into a voltage value, the voltage at two ends of the series resistor is converted into a proper signal by the amplifying circuit, the proper signal is finally sent to the main controller with the A/D function, the main controller detects the current value on the signal lamp holder, and the current value is related to the light emitting state of the signal lamp holder.
The working mode of the traffic signal lamp under the normal condition is as follows:
the master controller can detect the voltage values (red light, green light and yellow light) on the three lamp control lines, when the voltage value on a certain lamp control line is detected to be higher (exceeding 90V), and the voltage values on the other two lamp controls are about 0V, the corresponding signal lamp holder is lightened, and the other signal lamp holders are in a closed state.
Meanwhile, the main controller can acquire driving current values on the red, yellow and green lamp holders in real time. The lamp cap which is controlled to be lighted by the master control should have a larger driving current value (larger than the threshold value It), and the current values of the lamp caps of the other two signal lamps are very low or zero.
For example, when the master controller detects that the voltage of the red lamp control line is 220V, and the voltage values of the yellow lamp control line and the green lamp control line are 0V, the master controller turns on the red lamp holder (red L ED lamp panel) and turns off the yellow lamp holder and the green lamp holder, and the master controller also detects that the red lamp holder has a larger driving current value and the yellow lamp driving current value and the green lamp driving current value are substantially zero.
When a signal control system has a traffic conflict fault, most of the reasons are caused by electric leakage between an output part of a traffic signal controller and a lamp wire connection of a signal lamp. For example, when the green light lamp line of signal lamp red light lamp line and signal lamp, because age for a long time, or corrosion damage lead to lamp line insulating nature not good, indirect contact has taken place again between two lamp lines simultaneously, when the semaphore exports interchange forceful electric voltage to the red light lamp line of this signal lamp on, red light lamp line can be to green light lamp line on electric leakage, also has certain voltage value on the rate of leading to lamp line, final result will show: the red and green lights of the signal lamp are simultaneously lit, and a green conflict occurs.
When electric leakage occurs between different output channels of the signal machine and an electric leakage occurs in a driving circuit inside the signal lamp, the abnormity of red and green conflict can be caused, and the principle is the same as the above.
Fig. 4 exemplarily shows a flow of an abnormal state processing and returning method for a traffic signal lamp provided by an embodiment of the invention, and the flow may be executed by the traffic signal lamp.
As shown in fig. 4, the process may include:
The main controller can obtain the voltage value of each lamp wire of the signal lamp through the voltage acquisition module, and obtain the current value of each lamp holder through the lamp holder of the signal lamp and the drive detection circuit.
And 402, the main controller processes the abnormal state and sends a pulse signal corresponding to the abnormal state to the relay control end when determining that the signal lamp is in the abnormal state according to the voltage value of each lamp wire or the current value of each lamp holder of the signal lamp.
The specific implementation can include the following modes:
1. when the main controller determines that the voltage values of at least two lamp lines are larger than a first voltage threshold value, the main controller judges whether the difference between the voltage values of the at least two lamp lines is larger than a second voltage threshold value, if so, the main controller controls the lamp holder of the signal lamp corresponding to the lamp line with the highest voltage value to be lightened, otherwise, the main controller controls the yellow lamp holder of the signal lamp to be lightened and in a flashing state, and simultaneously sends a pulse signal with the first frequency to the relay control end.
2. And when the main controller determines that the current value of each lamp cap of the signal lamp does not accord with the corresponding control mode, the main controller sends a pulse signal with a second frequency to the relay control end.
3. When the main controller determines that the current value of the lighted signal lamp cap is smaller than the first current threshold value, the main controller sends a pulse signal with a third frequency to the relay control end.
4. And when the main controller determines that the voltage value of each lamp wire is smaller than the first voltage threshold value, the main controller controls all lamp caps of the signal lamp to be closed and sends a pulse signal with a fourth frequency to the relay control end.
For example, in a normal state, at the same time, two or three lamps should not be in red, yellow and green lamps of the same signal lamp, and the signal lamp is lighted at the same time, that is, at the same time, two or three lamp control lines cannot have a larger voltage value; when detecting that higher voltage appears on the two lamp control lines at the same time, electric leakage must occur at the output end of the signal machine or on the lamp line.
When the leakage occurs, the two lamp wires leaking electricity to each other are not in particularly ideal electrical contact with each other, so that a large voltage drop is generated in the leakage process. At the signal lamp end, it is detected that the voltage value on one lamp control line is higher and the voltage value on the other lamp control line is lower.
The main controller can obtain the voltage value on each lamp control line in real time, when larger voltage values exist on two lamp control lines at the same time, the main controller can judge which lamp control line has a higher voltage value, whether the voltage value difference value on the two lamp control lines is larger than a certain threshold value or not, if the voltage value difference value is larger than the certain threshold value, the main controller can control the corresponding signal lamp cap to be lightened, for example, when the voltage value on the red lamp equal control line is detected to be 220V, the voltage value on the green lamp equal control line is detected to be 160V, and the difference value is larger than a certain threshold value Vt, the main controller can lighten the red lamp cap (a red L ED lamp panel).
When the main controller detects that the two lamp control lines have larger voltage values and the difference value of the voltage values does not exceed the threshold value Vt, the main controller controls the yellow lamp cap of the signal lamp to be in a flashing state in a certain period, and simultaneously sends a pulse signal to the relay control end in the relay and resistive load part, wherein the frequency of the pulse is f0Finally, it is represented by a periodic variation of large amplitude of the current consumed by the signal lamp, with a frequency f0。
When the master controller respectively controls the lamp caps of the signal lamps to be lightened, the driving current of the lamp caps of the signal lamps can be detected in real time. When the detected current value of a certain signal lamp holder is not in accordance with the control mode, for example, the red light is controlled to be on, but the detected driving current of the red light lamp holder is very small, or the yellow light and the green light have larger current values at the same time, the master controller should completely turn off the signal lamp holder. The main controller sends pulse signals to the relay control ends in the relay and the resistance load part, and the frequency of the pulses is f1. Finally, the signal lamp disappearsThe current consumed has a periodic variation of relatively large amplitude and varying at a frequency f1。
When the master controller respectively controls the signal lamp caps to be lightened, when the corresponding signal lamp driving current value is detected to be lower (lower than the threshold value It), the signal lamp caps are not completely lightened (namely, dark and bright). The main controller sends pulse signals to the relay control ends in the relay and the resistance load part, and the frequency of the pulses is f2. Finally, the current consumed by the signal lamp has periodic variation with larger amplitude and the frequency of the variation is f2。
When the abnormality of the above condition does not exist, the main controller detects that the voltage of the lamp wire on the lamp wire is lower than 90V, the main controller closes all lamp caps, and simultaneously sends a pulse control signal with the frequency f3 to the relay.
In the embodiment of the present invention, a specific implementation process of the function of the signal lamp may be as shown in fig. 5, and includes:
Step 503, determine whether there is a lamp line voltage greater than 90V, if yes, go to step 504, if no, go to step 505.
And step 504, controlling to light the lamp cap corresponding to the lamp wire with the lighting voltage value larger than 90V.
And step 505, turning off all lamp heads, and sending a pulse control signal with the frequency f3 to the relay.
And step 507, controlling to light the lamp cap corresponding to the lamp wire with the maximum lighting voltage value.
And step 508, controlling the yellow lamp holder to be in a flickering state, and sending a pulse control signal with the frequency f0 to the relay.
In step 509, the driving current value of each burner is detected.
Step 511, judging whether the current value of the lamp holder which is not controlled to be lighted is zero, if so, turning to step 514, and if not, turning to step 512.
And step 514, controlling the yellow lamp holder to be in a flickering state, and sending a pulse control signal with the frequency f1 to the relay.
In the embodiment of the present invention, the semaphore end may acquire the abnormal state of the semaphore by:
the traffic signal controller acquires the abnormal state of the signal lamp as follows.
1. The traffic signal controller needs to report the abnormal state by the current value detection device on each lamp control line of the signal lamp.
2. When the traffic signal controller outputs normal light color (does not output flash), the current is detected to have pulse type change, namely, the signal lamp in the direction is in an abnormal output state.
3. When the change frequency of the detected current value (effective value) is f0, the serious electric leakage problem occurs between certain two lamp control lines of the signal lamp, and the signal lamp is already in a yellow flashing state.
4. When the change frequency of the detected current value (effective value) is f1, the signal lamp cap or the driving circuit is damaged, and the normal output cannot be realized.
5. When the current value (effective value) change frequency f2 is detected, it represents that the signal lamp is in a dark and bright state.
6. When the current value (effective value) is detected to change at the frequency f3, it represents that the signal lamp obtains a lamp control line voltage value which is too low (lower than 90V), and the signal lamp in the corresponding direction stops outputting the lamp color.
The embodiment of the invention has the following beneficial effects in the implementation process:
1. the abnormal condition that the traffic signal lights are red, green and bright due to electric leakage on the traffic signal machine output channel or the light control line can be avoided, and the reliability of the light color output of the traffic signal lights is greatly improved.
2. The detection probability of the abnormal output state of the lamp cap of the signal lamp can be improved, and the detection probability comprises the accurate detection of the conditions of dark and bright lamp cap and the like;
3. when the signal lamp output has serious abnormal conditions, the signal lamp can be controlled to flicker in yellow or directly turn off, and accidents caused by the fact that judgment of pedestrians and vehicle drivers is influenced by the abnormal output state are avoided.
4. The signal lamp can be used with most of signal machines meeting national standard requirements in a matched mode, and all functions of the signal lamp can be achieved without changing a hardware system.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A traffic signal lamp abnormal state processing and returning method is characterized by comprising the following steps:
the main controller obtains the voltage value of each lamp wire of the signal lamp and the current value of each lamp holder;
the main controller processes the abnormal state and sends a pulse signal corresponding to the abnormal state to the relay control end when determining that the signal lamp is in the abnormal state according to the voltage value of each lamp wire of the signal lamp and the current value of each lamp holder;
when the main controller determines that the current value of each lamp cap of the signal lamp does not accord with the corresponding control mode, the main controller sends a pulse signal with a second frequency to the relay control end;
when the main controller determines that the voltage values of at least two lamp lines are larger than a first voltage threshold value, the main controller judges whether the difference between the voltage values of the at least two lamp lines is larger than a second voltage threshold value, if so, the main controller controls the lamp holder of the signal lamp corresponding to the lamp line with the highest voltage value to be lightened, otherwise, the main controller controls the yellow lamp holder of the signal lamp to be lightened and in a flashing state, and simultaneously sends a pulse signal with the first frequency to the relay control end.
2. The method as claimed in claim 1, wherein the main controller processes the abnormal state and transmits a pulse signal corresponding to the abnormal state to the relay control terminal when determining that the signal lamp is in the abnormal state according to the voltage value of each lamp line and the current value of each lamp cap of the signal lamp, comprising:
and when the main controller determines that the current value of the lighted signal lamp holder is smaller than a first current threshold value, the main controller sends a pulse signal with a third frequency to the relay control end.
3. The method as claimed in claim 1, wherein the main controller processes the abnormal state and transmits a pulse signal corresponding to the abnormal state to the relay control terminal when determining that the signal lamp is in the abnormal state according to the voltage value of each lamp line and the current value of each lamp cap of the signal lamp, comprising:
and when the main controller determines that the voltage value of each lamp wire is smaller than the first voltage threshold value, the main controller controls all lamp caps of the signal lamp to be closed and sends a pulse signal with a fourth frequency to the relay control end.
4. A traffic signal, comprising: the device comprises a main controller, a voltage detection module, a rectification and energy storage circuit, a power supply module, a signal lamp holder, a driving detection circuit, a relay and a resistance load;
the master controller is configured to, upon determining that there are at least two light lines having a voltage value greater than a first voltage threshold, the main controller judges whether the difference of the voltage values of the at least two lamp wires is larger than a second voltage threshold value, if so, the main controller controls the lamp holder of the signal lamp corresponding to the lamp line with the highest voltage value to be lightened, otherwise, the main controller controls the yellow lamp holder of the signal lamp to be lightened and in a flashing state, simultaneously sending a pulse signal with a first frequency to the relay control end, and when the current value of each lamp holder of the signal lamp is determined to be not in accordance with the corresponding control mode, the main controller sends a pulse signal with a second frequency to the relay control end, controls the lamp cap of the signal lamp to be turned on or turned off, controls whether to access a resistance load and obtains a voltage value and a current value on each signal lamp line;
the voltage detection module is used for collecting voltage values on the lamp wires of the signal lamps and sending the voltage values to the main controller;
the rectification and energy storage circuit is used for rectifying the current value on each signal lamp wire and outputting the current value to a capacitor for energy storage;
the power supply module is used for converting the voltage output by the rectification and energy storage circuit into direct-current voltage to supply power to all components of the signal lamp;
the signal lamp holder and drive detection circuit is used for turning on or off the signal lamp holder under the control of the main controller and sending a current detection value of the signal lamp holder to the main controller;
the relay and the resistance load are used for receiving the control connection load of the main controller and consuming the current of the signal lamp.
5. The traffic signal of claim 4, wherein the voltage detection module includes a voltage acquisition circuit;
the voltage acquisition circuit acquires voltage values on lamp wires of the signal lamps, reduces the voltage values in an equal ratio to a preset voltage range, and sends the voltage values to the main controller.
6. The traffic signal of claim 4, wherein the rectifying and energy storage circuit comprises a diode rectifying circuit, a diode, and a high voltage capacitor;
and when the relay is controlled to be conducted by the master controller, part of the current output by the diode rectifying circuit is consumed through the load resistor.
7. The traffic signal lamp of claim 4, wherein the signal lamp head and drive detection circuit comprises a MOS switching circuit, an L ED lamp drive power supply, a sampling resistor, a signal lamp head, and an amplification circuit;
the voltage output by the power supply module flows into the L ED lamp driving power supply through the MOS switch circuit, the L ED lamp driving power supply converts the voltage into a voltage signal used by the signal lamp holder, and the converted voltage signal is output to the signal lamp holder through a sampling resistor;
the sampling resistor is connected with the signal lamp holder in series and converts a passing current value into a voltage value, and the amplifying circuit converts voltages at two ends of the sampling resistor into voltage signals and sends the voltage signals to the main controller.
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| CN109064768B (en) * | 2018-09-28 | 2019-11-29 | 通号（长沙）轨道交通控制技术有限公司 | One kind being used for traffic signals facility staff realtime monitoring system and method |
| CN109493624B (en) * | 2018-11-06 | 2020-10-23 | 扬州金钧照明有限公司 | Traffic signal lamp with self-checking function |
| CN111833634B (en) * | 2019-04-17 | 2021-07-13 | 青岛海信网络科技股份有限公司 | Signal lamp fault detection method and device |
| CN114495555A (en) * | 2020-11-12 | 2022-05-13 | 深圳市法马新智能设备有限公司 | Automatic correction device of traffic signal lamp and traffic signal lamp system |
| CN112735158A (en) * | 2020-12-29 | 2021-04-30 | 武汉微创光电股份有限公司 | Signal lamp red-yellow-green lamp fault monitoring method and device |
| CN114441990B (en) * | 2021-12-23 | 2023-05-02 | 北京北大千方科技有限公司 | Electric leakage detection device and method for traffic signal machine |
| CN114613183B (en) * | 2022-03-21 | 2023-03-28 | 河南云帆电子科技有限公司 | Signal lamp adjusting system based on wisdom traffic |
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