Scene-adaptive signal lamp fault detection system and method

Abstract

The invention discloses a scene self-adaptive signal lamp fault detection system and method. The system comprises a voltage adjusting unit, a power input voltage detection unit, a lamp control switch unit, a lamp control output voltage detection unit, a lamp control output current detection unit and a main control unit. The main control unit is used for generating a control instruction to the voltage regulation unit and the lamp control switch unit; and the signal lamp fault detection unit is used for adaptively calculating a signal lamp fault detection threshold value and judging a signal lamp fault according to the detected voltage value of the power input end of the voltage regulation unit, the detected current value of the signal lamp control output end, the detected voltage value of the signal lamp control output end and a phase conflict matrix stored in the main control unit. According to the method, the fault detection threshold value is calculated in a self-adaptive mode according to the field working condition, manual setting is not needed, after the signal lamp set is installed, only one-time fault detection threshold value self-adaptive calculation needs to be carried out, and the engineering application complexity is greatly reduced.

Description

Technical Field

[0001] This invention belongs to the field of traffic signal light fault detection technology, specifically relating to a scene-adaptive traffic signal light fault detection system and method. Background Technology

[0002] As a core infrastructure for traffic control at intersections, the operational stability of urban road traffic signal systems directly impacts traffic order and safety. However, due to the long-term exposure of signal light equipment to complex and changing outdoor environments, key components such as light-emitting units, drive circuits, controllers, and communication links are all at risk of malfunction. Common faults include lights remaining constantly on (commonly known as "always on"), lights failing to illuminate when they should (commonly known as "lights off"), abnormal brightness decay, and signal conflicts (such as multiple directions displaying green lights simultaneously). Currently, the mainstream method for detecting signal light faults is to use sensors to collect voltage and current values ​​on the signal light link, monitor changes in the electrical parameters of the light circuit, and trigger a fault alarm or degradation when the parameters exceed a preset fault detection threshold.

[0003] In practical engineering applications, the grid voltage fluctuates, and the power of different signal light groups is not the same. The traditional method of setting simple fault detection thresholds is prone to false alarms. However, if different fault detection thresholds are set according to the grid voltage gradient and the power of the signal light group, there are many parameters, the configuration workload is large, and on-site engineers are prone to misconfiguring parameters, which is not conducive to the implementation of the project.

[0004] Therefore, there is an urgent need for a refined signal light fault detection method and system that can adaptively calculate the fault detection threshold based on the on-site working conditions, accurately and reliably identify signal light faults, and eliminate the need for manual setting of the fault detection threshold. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a scene-adaptive traffic light fault detection system and method to overcome the technical defects of traditional simple fault detection threshold setting methods, such as high false alarm rate and reliance on on-site manual debugging, and to solve the problem of misjudgment of traffic light faults caused by power grid voltage fluctuations, traffic light paralleling, etc.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] The present invention provides a scene-adaptive traffic light fault detection system, comprising: a voltage regulation unit, an input voltage detection unit, a light control switch unit, a light control output voltage detection unit, a light control output current detection unit, and a main control unit;

[0008] The voltage regulation unit is used to adjust the input voltage of the signal lights according to the control commands issued by the main control unit.

[0009] The input voltage detection unit is used to detect the voltage value at the input terminal of the voltage regulation unit and send it to the main control unit;

[0010] The lighting control switch unit is used to control the power supply of the signal lamp group to be turned on and off according to the control commands issued by the main control unit;

[0011] The lighting control output voltage detection unit is used to detect the voltage value at the output terminal of the signal light and send it to the main control unit.

[0012] The lamp control output current detection unit is used to detect the current value at the output terminal of the signal lamp and send it to the main control unit;

[0013] The main control unit is used to generate control commands to the voltage regulation unit and the lighting control switch unit, as well as to adaptively calculate the fault detection threshold of the signal light and to judge the signal light fault based on the detected voltage value at the input terminal of the voltage regulation unit, the current value at the output terminal of the signal light control switch, the voltage value at the output terminal of the signal light control switch, and the phase conflict matrix stored in the main control unit.

[0014] This invention also provides a scene-adaptive traffic light fault detection method, based on the above system, with the following steps:

[0015] (1) Set the lower limit of the rated operating voltage of the signal light group Upper limit of rated operating voltage ;

[0016] (2) The main control unit controls the voltage regulation unit to adjust the signal light control input voltage. Adjust to Calculate the voltage regulation step size ;

[0017] (3) The main control unit controls the lighting switch unit to sequentially light up the red, yellow, and green lights of the signal light group, at intervals of... The signal light control output current value is detected and recorded once for a certain period of time. The value is a constant; continuous detection and recording are performed. Take the average value once;

[0018] (4) The main control unit controls the voltage regulation unit to continuously adjust the signal light control input voltage. Adjust the voltage step size Adjust upwards and calculate the average output current of each traffic light group until the input voltage of the traffic light group reaches the upper limit of the rated operating voltage of the traffic light group. ;

[0019] (5) Calculate the signal light fault detection threshold according to the interval distribution method. For each signal light control input voltage Define the voltage threshold range ,by Using the current threshold as a reference, calculate the input voltage detection threshold and the signal light control output current detection threshold;

[0020] (6) A mapping relationship is established between the group's input voltage detection threshold and the corresponding signal light control output current detection threshold sequence, which serves as the signal light fault detection threshold.

[0021] (7) The main control unit controls the power-in voltage detection unit, the lamp control output voltage detection unit, and the lamp control output current detection unit to continuously detect the voltage at the power-in terminal of the voltage regulation unit. , The voltage at the output terminals of the red, yellow, and green light controllers and current And perform fault diagnosis.

[0022] Furthermore, the voltage adjustment step size in step (2) The calculation formula is as follows:

[0023] ;

[0024] in, This is the voltage regulation frequency coefficient, which is a constant; Input voltage for the signal light control that needs adjustment The number of values, .

[0025] Furthermore, step (3) specifically includes:

[0026] The input voltage for signal light control is Time, No The first detection and recording The current output value of each lamp control switch unit is , , , Given the total number of light control switch units connected to the traffic light group, the traffic light control input voltage is: Time The formula for calculating the average output current of each lamp control switch unit is as follows:

[0027] ;

[0028] The input voltage for signal light control is hour, A sequence composed of the average output current of each signal light control .

[0029] Furthermore, the formula for adjusting the signal light control input voltage in step (4) is as follows:

[0030] ;

[0031] in, Indicates the current signal light control input voltage The new signal light control input voltage is obtained after one adjustment;

[0032] Initial value of signal light control input voltage Final value of signal light control input voltage For each step size Adjusted voltage value Calculated according to step (3) The average output current of each traffic light is used to form a sequence. .

[0033] Furthermore, the calculation formulas for the input voltage detection threshold and the signal light control output current detection threshold in step (5) are as follows:

[0034] ;

[0035] ;

[0036] ;

[0037] ;

[0038] in, To and The corresponding lower limit threshold for input voltage detection; To and The corresponding upper limit threshold for input voltage detection; For the input voltage at The corresponding lower limit threshold sequence for signal light control output current detection within the interval. For sequence The Middle The lower limit threshold for detecting the output current of a single traffic light; For the input voltage at The upper limit threshold sequence for detecting the output current of the traffic lights within the interval; For sequence The Middle The upper limit threshold for detecting the output current of each traffic light; This is the current lower limit threshold coefficient, which is a constant; This is the upper limit threshold coefficient for current, which is a constant.

[0039] Furthermore, in step (6) the... The sequence of input voltage detection threshold and signal light output current detection threshold is stored in the main control unit according to a mapping relationship, and serves as the light fault detection threshold; the mapping relationship is as follows:

[0040] ;

[0041] in, To match the initial value of the signal light control input voltage The corresponding lower limit threshold for input voltage detection. To match the initial value of the signal light control input voltage The corresponding upper limit threshold for input voltage detection, For the input voltage at The corresponding lower limit threshold sequence for signal light control output current detection within the interval. For the input voltage at The upper limit threshold sequence for detecting the output current of the traffic lights within the interval; To the final value of the signal light control input voltage The corresponding lower limit threshold for input voltage detection. To the final value of the signal light control input voltage The corresponding upper limit threshold for input voltage detection, For the input voltage at The corresponding lower limit threshold sequence for signal light control output current detection within the interval. For the input voltage at The upper limit threshold sequence for detecting the output current of the signal light control within the interval.

[0042] Furthermore, the fault determination in step (7) is as follows:

[0043] (71) If If the incoming voltage is low, a fault exists.

[0044] (72) If If the input voltage is too high, a fault exists.

[0045] (73) If Then, according to the mapping relationship in step (6), the comparison is searched. Location The range is then determined based on the signal light control output current detection threshold sequence. judge Is the output current of each traffic light control normal? When the light control switch is in the ON state, if... If the output load current of this street light controller is less than the normal value, the signal light will have a fault of being half-lit or not lit at all; if If the output load current of this street light controller is greater than the normal value, the signal light may be experiencing a fault due to parallel wiring or a short circuit with other light wires, causing all lights to be on simultaneously; if If so, the output load current of the signal light control is normal;

[0046] (74) Based on the phase conflict matrix and the switching state of the lamp control switch unit, compare sequentially. The voltage at the output terminals of the red, yellow, and green light controllers To determine if there are any faults such as green conflict or red and green lights being on simultaneously.

[0047] The beneficial effects of this invention are:

[0048] 1. This invention adaptively calculates the fault detection threshold based on the on-site working conditions, eliminating the need for manual setting. Moreover, after the signal light group is installed, only one adaptive calculation of the fault detection threshold is required, which greatly reduces the complexity of engineering applications.

[0049] 2. Based on the grid voltage gradient and a single detection threshold for each light, this invention provides a refined and intelligent assessment that can accurately and quickly identify traffic light faults. It overcomes the technical shortcomings of traditional methods that involve setting simple fault detection thresholds, resulting in high false alarm rates and reliance on on-site manual debugging. This invention also solves the problem of misjudging light faults caused by grid voltage fluctuations and traffic light paralleling. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the system of the present invention.

[0051] Figure 2 This is a flowchart of the method of the present invention. Detailed Implementation

[0052] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0053] Reference Figure 1 As shown, the present invention provides a scene-adaptive traffic light fault detection system, comprising: a voltage regulation unit, an input voltage detection unit, a light control switch unit, a light control output voltage detection unit, a light control output current detection unit, and a main control unit.

[0054] The voltage regulation unit is used to adjust the input voltage of the signal lights according to the control commands issued by the main control unit.

[0055] The input voltage detection unit is used to detect the voltage value at the input terminal of the voltage regulation unit and send it to the main control unit;

[0056] The lighting control switch unit is used to control the power supply of the signal lamp group to be turned on and off according to the control commands issued by the main control unit;

[0057] The lighting control output voltage detection unit is used to detect the voltage value at the output terminal of the signal light and send it to the main control unit.

[0058] The lamp control output current detection unit is used to detect the current value at the output terminal of the signal lamp and send it to the main control unit;

[0059] The main control unit is used to generate control commands to the voltage regulation unit and the lighting control switch unit, as well as to adaptively calculate the fault detection threshold of the signal light and to judge the signal light fault based on the detected voltage value at the input terminal of the voltage regulation unit, the current value at the output terminal of the signal light control switch, the voltage value at the output terminal of the signal light control switch, and the phase conflict matrix stored in the main control unit.

[0060] Reference Figure 2 As shown, the present invention also provides a scene-adaptive traffic light fault detection method, based on the above system, with the following steps:

[0061] (1) Set the lower limit of the rated operating voltage of the signal light group Upper limit of rated operating voltage ;

[0062] (2) The main control unit controls the voltage regulation unit to adjust the signal light control input voltage. Adjust to Calculate the voltage regulation step size ;

[0063] Voltage adjustment step size The calculation formula is as follows:

[0064] ;

[0065] in, This is the voltage regulation frequency coefficient, which is a constant; Input voltage for the signal light control that needs adjustment The number of values, .

[0066] (3) The main control unit controls the lighting switch unit to sequentially light up the red, yellow, and green lights of the signal light group, at intervals of... The signal light control output current value is detected and recorded once for a certain period of time. The value is a constant; continuous detection and recording are performed. Take the average value once;

[0067] The input voltage for signal light control is Time, No The first detection and recording The current output value of each lamp control switch unit is , , , Given the total number of light control switch units connected to the traffic light group, the traffic light control input voltage is: Time The formula for calculating the average output current of each lamp control switch unit is as follows:

[0068] ;

[0069] The input voltage for signal light control is hour, A sequence composed of the average output current of each signal light control .

[0070] (4) The main control unit controls the voltage regulation unit to continuously adjust the signal light control input voltage. Adjust the voltage step size Adjust upwards and calculate the average output current of each traffic light group until the input voltage of the traffic light group reaches the upper limit of the rated operating voltage of the traffic light group. ;

[0071] The formula for adjusting the input voltage of the traffic light control is as follows:

[0072] ;

[0073] in, Indicates the current signal light control input voltage The new signal light control input voltage is obtained after one adjustment;

[0074] Initial value of signal light control input voltage Final value of signal light control input voltage For each step size Adjusted voltage value Calculated according to step (3) The average output current of each traffic light is used to form a sequence. .

[0075] (5) Calculate the signal light fault detection threshold according to the interval distribution method. For each signal light control input voltage Define the voltage threshold range ,by Using the current threshold as a reference, calculate the input voltage detection threshold and the signal light control output current detection threshold;

[0076] The calculation formulas for the input voltage detection threshold and the signal light control output current detection threshold are as follows:

[0077] ;

[0078] ;

[0079] ;

[0080] ;

[0081] in, To and The corresponding lower limit threshold for input voltage detection; To and The corresponding upper limit threshold for input voltage detection; For the input voltage at The corresponding lower limit threshold sequence for signal light control output current detection within the interval. For sequence The Middle The lower limit threshold for detecting the output current of a single traffic light; For the input voltage at The upper limit threshold sequence for detecting the output current of the traffic lights within the interval; For sequence The Middle The upper limit threshold for detecting the output current of each traffic light; This is the current lower limit threshold coefficient, which is a constant; This is the upper limit threshold coefficient for current, which is a constant.

[0082] (6) A mapping relationship is established between the group's input voltage detection threshold and the corresponding signal light control output current detection threshold sequence, which serves as the signal light fault detection threshold.

[0083] right The sequence of input voltage detection threshold and signal light output current detection threshold is stored in the main control unit according to a mapping relationship, and serves as the light fault detection threshold; the mapping relationship is as follows:

[0084] ;

[0085] in, To match the initial value of the signal light control input voltage The corresponding lower limit threshold for input voltage detection. To match the initial value of the signal light control input voltage The corresponding upper limit threshold for input voltage detection, For the input voltage at The corresponding lower limit threshold sequence for signal light control output current detection within the interval. For the input voltage at The upper limit threshold sequence for detecting the output current of the traffic lights within the interval; To the final value of the signal light control input voltage The corresponding lower limit threshold for input voltage detection. To the final value of the signal light control input voltage The corresponding upper limit threshold for input voltage detection, For the input voltage at The corresponding lower limit threshold sequence for signal light control output current detection within the interval. For the input voltage at The upper limit threshold sequence for detecting the output current of the signal light control within the interval.

[0086] (7) The main control unit controls the power-in voltage detection unit, the lamp control output voltage detection unit, and the lamp control output current detection unit to continuously detect the voltage at the power-in terminal of the voltage regulation unit. , The voltage at the output terminals of the red, yellow, and green light controllers and current And perform fault diagnosis;

[0087] The specific fault diagnosis is as follows:

[0088] (71) If If the incoming voltage is low, a fault exists.

[0089] (72) If If the input voltage is too high, a fault exists.

[0090] (73) If Then, according to the mapping relationship in step (6), the comparison is searched. Location The range is then determined based on the signal light control output current detection threshold sequence. judge Is the output current of each traffic light control normal? When the light control switch is in the ON state, if... If the output load current of this street light controller is less than the normal value, the signal light will have a fault of being half-lit or not lit at all; if If the output load current of this street light controller is greater than the normal value, the signal light may be experiencing a fault due to parallel wiring or a short circuit with other light wires, causing all lights to be on simultaneously; if If so, the output load current of the signal light control is normal;

[0091] (74) Based on the phase conflict matrix and the switching state of the lamp control switch unit, compare sequentially. The voltage at the output terminals of the red, yellow, and green light controllers To determine if there are any faults such as green conflict or red and green lights being on simultaneously.

[0092] In the example, the intersection has 4 traffic light groups, each containing 3 lights: red, yellow, and green. The order of the lights from the 1st to the 12th is red, yellow, green, red, yellow, green, red, yellow, green, red, yellow, green. Therefore, the traffic controller needs to provide 12 light control outputs to the traffic light groups, which is the total number of light control switch units connected to the traffic light groups. The value is 12. After the traffic light assembly is installed and lit normally, set the lower limit of the rated operating voltage of the traffic light assembly (180V) and the upper limit of the rated operating voltage (220V) to the system. In this example, the voltage adjustment frequency coefficient is... The value is 10, and the voltage regulation step size can be calculated according to the above formula. It is 4V.

[0093] First, the main control unit controls the voltage regulation unit to adjust the input voltage for the signal lights. Adjust to 180V, at this time The value is 0. The main control unit controls the lighting switch unit to sequentially light up the red, yellow, and green lights of the light group. While the lights are on, at each interval... (This example) The signal light control output current value is recorded once every 50 milliseconds (with a value of 50 milliseconds), and this is repeated continuously. (This example) The value is taken 5 times, and the current output by the first lamp control switch unit is obtained by sampling 5 times consecutively. 36.6mA 36.6mA 36.3mA 36.4mA The average output current of the first lamp control switch unit is 36.3mA. The average output current is 36.4mA; subsequently, the average output current of the second lamp control switch unit is... The average output current of the 12th lamp control switch unit is 35.1mA... The value is 40mA, which is the average value sequence of the output current of the 12 traffic light controllers. {36.4, 35.1, 40.2, 36.2, 34.9, 40.1, 36.5, 35.3, 40.5, 36.1, 35.2, 40};

[0094] The main control unit controls the voltage regulation unit to adjust the input voltage of the signal lights. By step size Adjust the voltage upwards to 184V. The value is 1, representing the average output current sequence of 12 traffic light controllers. {38.4, 37, 42.4, 38.2, 36.8, 42.3, 38.5, 37.2, 42.2, 38.1, 37.1, 42.2}; Similarly, the input voltage for signal light control. Adjust the voltage to 188V. The value is 2, which is the average value sequence of the output current of 12 traffic lights. {40.1, 38.7, 44.3, 39.9, 38.4, 44.2, 40.2, 38.9, 44.6, 39.8, 38.8, 44.1}; Signal light control input voltage Adjust the voltage to 192V. The value is 3, which represents the average output current sequence of 12 traffic light controllers. {41.3, 39.8, 45.6, 41.1, 39.6, 45.5, 41.4, 40.1, 45.9, 40.9, 39.9, 45.4}; Signal light control input voltage Adjust the voltage to 196V. The value is 4, representing the average output current sequence of 12 traffic light controllers. {43.2, 41.7, 47.7, 42.9, 41.4, 47.6, 43.3, 41.9, 48, 42.8, 41.8, 47.5}; Signal light control input voltage Adjust the voltage to 200V. The value is a sequence of the average output current of 5 and 12 traffic lights. {45.1, 43.5, 49.8, 44.9, 43.2, 49.7, 45.2, 43.7, 50.2, 44.7, 43.6, 49.6}; Signal light control input voltage Adjust the voltage to 204V. The value is a sequence of the average output current of 6 and 12 traffic lights. {46.7, 45, 51.6, 46.4, 44.8, 51.4, 46.8, 45.3, 51.9, 46.3, 45.2, 51.3}; Signal light control input voltage Adjust the voltage to 208V. The value is a sequence of the average output current of 7 and 12 traffic lights. {48.7, 47, 53.8, 48.4, 46.7, 53.6, 48.8, 47.2, 54.2, 48.3, 47.1, 53.5}; Signal light control input voltage Adjust the voltage to 212V. The value is a sequence of the average output current of 8 and 12 traffic lights. {50.8, 48.9, 56.1, 50.5, 48.7, 55.9, 50.9, 49.3, 56.5, 50.4, 49.1, 55.8}; Signal light control input voltage Adjust the voltage to 216V. The value is a sequence of the average output current of 9 and 12 traffic lights. {53.4, 51.5, 58.8, 53.1, 51.2, 58.8, 53.4, 51.7, 59.4, 52.9, 51.6, 58.7}; Signal light control input voltage Adjust the voltage to 220V. The value is a sequence of average output current values ​​for 10 and 12 traffic lights. {56.8, 54.8, 62.7, 56.5, 54.4, 62.6, 56.9, 55, 63.2, 56.3, 54.9, 62.4}.

[0095] According to the voltage threshold calculation formula in step (5), the following can be calculated:

[0096] 178V 182V;

[0097] 182V, 186V;

[0098] 186V 190V;

[0099] 190V 194V;

[0100] 194V, 198V;

[0101] 198V 202V;

[0102] 202V, 206V;

[0103] 206V 210V;

[0104] 210V 214V;

[0105] 214V, 218V;

[0106] 218V 222V;

[0107] In this example, the current lower limit threshold coefficient The value is 0.7, which is the upper limit threshold coefficient for current. Taking a value of 1.2, according to the current threshold calculation formula in step (5), the following can be calculated:

[0108] {25.5, 24.6, 28.1, 25.3, 24.4, 28.1, 25.6, 24.7, 28.4, 25.3, 24.6, 28};

[0109] {43.7, 42.1, 48.2, 43.4, 41.9, 48.1, 43.8, 42.4, 48.6, 43.3, 42.2, 48};

[0110] {26.9, 25.9, 29.7, 26.7, 25.8, 29.6, 27, 26, 29.5, 26.7, 26, 29.5};

[0111] {46.1, 44.4, 50.9, 45.8, 44.2, 50.8, 46.2, 44.6, 50.6, 45.7, 44.5, 50.6};

[0112] {28.1, 27.1, 31, 27.9, 26.9, 30.9, 28.1, 27.2, 31.2, 27.9, 27.2, 30.9};

[0113] {48.1, 46.4, 53.2, 47.9, 46.1, 53, 48.2, 46.7, 53.5, 47.8, 46.6, 52.9};

[0114] {28.9, 27.9, 31.9, 28.8, 27.7, 31.9, 29, 28.1, 32.1, 28.6, 27.9, 31.8};

[0115] {49.6, 47.8, 54.7, 49.3, 47.5, 54.6, 49.7, 48.1, 55.1, 49.1, 47.9, 54.5};

[0116] {30.2，29.2，33.4，30，29，33.3，30.3，29.3，33.6，30，29.3，33.3}；

[0117] {51.8，50，57.2，51.5，49.7，57.1，52，50.3，57.6，51.4，50.2，57}；

[0118] {31.6，30.5，34.9，31.4，30.2，34.8，31.6，30.6，35.1，31.3，30.5，34.7}；

[0119] {54.1，52.2，59.8，53.9，51.8，59.6，54.2，52.4，60.2，53.6，52.3，59.5}；

[0120] {32.7，31.5，36.1，32.5，31.4，36，32.8，31.7，36.3，32.4，31.6，35.9}；

[0121] {56，54，61.9，55.7，53.8，61.7，56.2，54.4，62.3，55.6，54.2，61.6}；

[0122] {34.1，32.9，37.7，33.9，32.7，37.5，34.2，33，37.9，33.8，33，37.5}；

[0123] {58.4，56.4，64.6，58.1，56，64.3，58.6，56.6，65，58，56.5，64.2}；

[0124] {35.6，34.2，39.3，35.4，34.1，39.1，35.6，34.5，39.6，35.3，34.4，39.1}；

[0125] {61，58.7，67.3，60.6，58.4，67.1，61.1，59.2，67.8，60.5，58.9，67}；

[0126] {37.4, 36.1, 41.2, 37.2, 35.8, 41.2, 37.4, 36.2, 41.6, 37, 36.1, 41.1};

[0127] {64.1, 61.8, 70.6, 63.7, 61.4, 70.6, 64.1, 62, 71.3, 63.5, 61.9, 70.4};

[0128] {39.8, 38.4, 43.9, 39.6, 38.1, 43.8, 39.8, 38.5, 44.2, 39.4, 38.4, 43.7};

[0129] {68.2, 65.8, 75.2, 67.8, 65.3, 75.1, 68.3, 66, 75.8, 67.6, 65.9, 74.9};

[0130] The voltage and current detection thresholds are stored in the main control unit according to the mapping relationship in step (6). During normal operation, the signal controller collects the voltage at the input terminal of the voltage regulation unit once per second. Voltage of the output terminals of the 12 red, yellow, and green light controllers and current The voltage at the input terminal of the voltage regulation unit was collected in a certain instance. The voltage of the 12 red, yellow, and green light control output terminals is 210V, 0V, 208V, 0V, 0V, 209V, 210V, 0V, 0V, 0V, 0V, 210V, respectively. The current of the 12 red, yellow, and green light control output terminals is 95.5mA, 0mA, 0mA, 0mA, 0mA, 47.2mA, 48.7mA, 0mA, 0mA, 0mA, 0mA, 47.9mA, respectively. At this time, the states of the 12 red, yellow, and green light control switch units are ON, OFF, OFF, OFF, OFF, ON, ON, OFF, OFF, OFF, OFF, ON, respectively. According to step (7), the input voltage is... Normal, and Then, according to the signal light control output current detection threshold sequence To diagnose a fault in the output current of the traffic light control, since the 1st, 6th, 7th, and 12th red, yellow, and green light control switch units are in the ON state, check whether their current values ​​are normal. The current upper limit threshold is 95.5mA. It is 58.4mA, that is This indicates that the load current of the first traffic light control output is greater than normal, suggesting a fault such as parallel wiring or a short circuit with other light wires causing simultaneous illumination. The collected traffic light control output voltage values ​​show that the output voltage of the third traffic light control is 208V, while this control switch unit is in the off state. Under normal circumstances, its output voltage should be 0V. This indicates a fault in the traffic light group where the red and green light power lines are short-circuited, causing simultaneous red and green illumination. The output current of the sixth traffic light control... It is 47.2mA. This indicates that the output load current of the traffic light control is normal; similarly, the output load current of the 7th and 12th traffic lights is also normal.

[0131] This invention has many specific applications. The above description is only a preferred embodiment of this invention. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of this invention, and these improvements should also be considered within the scope of protection of this invention.

Claims

1. A scene-adaptive traffic light fault detection system, characterized in that, The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps: The method comprises the following steps:

2. A scene-adaptive traffic light fault detection method based on the system of claim 1, characterized in that, The method comprises the following steps: (1) setting the lower limit of the rated operating voltage of the signal light group , the upper limit of the rated operating voltage ; (2) The main control unit controls the voltage regulation unit to adjust the input voltage of the signal lamp control to , calculates the voltage regulation step ; (3) The main control unit controls the light control switch unit to light the red light, yellow light and green light of the signal light group in turn, and detects and records the signal light control output current value once every interval The average value is recorded continuously. times. (4) The main control unit controls the voltage regulation unit to continuously input the signal lamp control voltage According to the voltage regulation step size The signal lamp control output current average value of each signal lamp group is adjusted upwards and calculated until the signal lamp control input voltage value reaches the upper limit of the rated working voltage of the signal lamp group ; (5) Calculate the signal lamp fault detection threshold according to the interval distribution mode, for each signal lamp lamp control input voltage , the voltage threshold interval is divided, the input voltage detection threshold and the signal lamp lamp control output current detection threshold are calculated; (6) will be The group establishes a mapping relationship between the voltage detection threshold and the corresponding signal lamp lamp control output current detection threshold sequence as the signal lamp fault detection threshold. (7) The main control unit controls the power-in voltage detection unit, the lamp control output voltage detection unit, and the lamp control output current detection unit to continuously detect the voltage at the power-in terminal of the voltage regulation unit. , The voltage at the output terminals of the red, yellow, and green light controllers and current And perform fault diagnosis.

3. The scene-adaptive beacon fault detection method of claim 2, wherein, The voltage adjustment step size in the step (2) The calculation formula is as follows: ； wherein, is a voltage regulation frequency coefficient, which is a constant; is the signal lamp light control input voltage that needs to be regulated the number of values, .

4. The scene-adaptive beacon fault detection method of claim 3, wherein, The method comprises the following steps: The input voltage for signal light control is Time, No The first detection and recording The current output value of each lamp control switch unit is , , , Given the total number of light control switch units connected to the traffic light group, the traffic light control input voltage is: Time The formula for calculating the average output current of each lamp control switch unit is as follows: ； The signal lamp lamp control input voltage is , The average value sequence of the signal lamp lamp control output current is composed of .

5. The scene-adaptive beacon fault detection method of claim 4, wherein, The method comprises the following steps: ； wherein, Vsig represents the current signal lamp lamp control input voltage the new signal lamp lamp control input voltage after one adjustment; Signal lamp lamp control input voltage initial value , signal lamp lamp control input voltage final value ; for each step adjusted voltage value , according to step (3) to obtain signal lamp lamp control output current average value, consisting of sequence .

6. The scene-adaptive beacon fault detection method of claim 5, wherein, The method comprises the following steps: ； ； ； ； wherein, is a corresponding input voltage detection lower threshold value; is a corresponding input voltage detection upper threshold value; is a corresponding input voltage detection lower threshold value; is a corresponding input voltage detection upper threshold value; is a sequence of signal lamp lamp control output current detection lower threshold values corresponding to the input voltage in the interval is a sequence of signal lamp lamp control output current detection lower threshold values corresponding to the input voltage in the interval is the th signal lamp lamp control output current detection lower threshold value in the sequence is the th signal lamp lamp control output current detection upper threshold value in the sequence is a sequence of signal lamp lamp control output current detection upper threshold values corresponding to the input voltage in the interval is a sequence of signal lamp lamp control output current detection upper threshold values corresponding to the input voltage in the interval is the th signal lamp lamp control output current detection upper threshold value in the sequence is a current lower threshold value coefficient; is a current upper threshold value coefficient.

7. The scene-adaptive beacon fault detection method of claim 6, wherein, The step (6) is to The group input voltage detection threshold and the signal lamp control output current detection threshold sequence are stored in the master control unit in a mapping relationship as the lamp fault detection threshold; the mapping relationship is as follows: ； wherein, is a signal lamp lamp control input voltage initial value corresponding incoming voltage detection lower threshold value, is a signal lamp lamp control input voltage initial value corresponding incoming voltage detection upper threshold value, is a signal lamp lamp control output current detection lower threshold value sequence corresponding to when the incoming voltage is in the interval is a signal lamp lamp control output current detection upper threshold value sequence corresponding to when the incoming voltage is in the interval is a signal lamp lamp control input voltage final value corresponding incoming voltage detection lower threshold value, is a signal lamp lamp control input voltage final value corresponding incoming voltage detection upper threshold value, is a signal lamp lamp control input voltage final value corresponding incoming voltage detection upper threshold value, is a signal lamp lamp control output current detection lower threshold value sequence corresponding to when the incoming voltage is in the interval is a signal lamp lamp control output current detection upper threshold value sequence corresponding to when the incoming voltage is in the interval is a signal lamp lamp control output current detection lower threshold value sequence corresponding to when the incoming voltage is in the interval is a signal lamp lamp control output current detection upper threshold value sequence corresponding to when the incoming voltage is in the interval 8. 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Location The range is then determined based on the signal light control output current detection threshold sequence. judge Is the output current of each traffic light control normal? When the light control switch is in the ON state, if... If the output load current of this street light controller is less than the normal value, the signal light will have a fault of being half-lit or not lit at all; if If the output load current of this street light controller is greater than the normal value, the signal light may be experiencing a fault due to parallel wiring or a short circuit with other light wires, causing all lights to be on simultaneously; if If so, the output load current of the signal light control is normal; (74) According to the phase conflict matrix and the switch state of the light control switch unit, the voltage of the red light, yellow light and green light control output ends are compared in turn to determine whether there is a green conflict or a red-green simultaneous lighting fault. to determine whether there is a green conflict or a red-green simultaneous lighting fault.

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