CN108171966A - Sensor-based pedestrian crossing traffic signal light control device and control method - Google Patents

Abstract

The invention provides a sensor-based pedestrian street-crossing traffic signal lamp control device and a control method, and belongs to the technical field of traffic signal control. Pedestrian traffic signal lamp controlling means that crosses street based on sensor includes detection module, data processing module, control module, signal controller and traffic signal lamp, wherein: the detection module is used for detecting the number of pedestrians waiting at two ends of a road and pedestrian crossing speed data; the data processing module is used for determining the green light lighting time and the green light flashing time according to the data detected by the detection module; and the signal controller controls the lighting state and the duration of the green light according to the lighting time of the green light and the green light flashing time determined by the data processing module. The invention utilizes the microwave detector to monitor the number of people entering the detection area and the waiting time, and counts and times accurately and quickly in real time through the ultra-high precision monitoring efficiency.

Description

Sensor-based pedestrian crossing traffic signal light control device and control method

technical field

The invention relates to the technical field of traffic signal control, in particular to a sensor-based pedestrian crossing traffic signal light control device and control method.

Background technique

There are many sections of pedestrian crossings distributed on urban roads, and the pedestrian crossings of these sections generally adopt one of three control methods: timing signal control, button signal control or no control measures. Timing signal control can only adapt to some time periods and some road sections, and it cannot meet travel needs in the face of ever-changing and complex traffic environments. Push-button signal control is set up in some areas. This control method protects pedestrian crossing safety to a certain extent, but it cannot fundamentally solve the problem of pedestrian crossing the street. Not as good as before. In signal-controlled pedestrian crossings, if the signal is not properly set, it will cause poor motor vehicle flow, increase motor vehicle operation delays, and aggravate urban noise pollution and air pollution. As a result, the crossing traffic entity cannot complete the crossing behavior within a signal cycle, the delay in crossing the street increases, or the traffic entity waits for too long to cross the street, causing some traffic entities to cross the street forcibly, etc., reducing the safety of crossing the street.

Contents of the invention

The invention proposes a sensor-based pedestrian crossing traffic signal light control device.

The technical solution for realizing the present invention is: a sensor-based pedestrian crossing traffic signal control device, which is characterized in that it includes a detection module, a data processing module, a control module, a signal control machine and a traffic signal light, wherein:

The detection module is used to detect the number of pedestrians waiting at both ends of the road and pedestrian crossing speed data;

The data processing module is used to determine the lighting time of the green light and the flashing time of the green light according to the data detected by the detection module;

The signal control machine controls the lighting state and duration of the green light according to the lighting time of the green light and the flickering time of the green light determined by the data processing module.

Preferably, the detection module is a microwave sensor, a video detector or an infrared detector.

Preferably, the detection module is placed at the waiting place of pedestrians at both ends of the zebra crossing, and is set directly opposite to the other end of the zebra crossing.

Preferably, the green light lighting time is:

Among them, B represents the length of pedestrian crossing, D represents the width of pedestrian crossing, V represents the walking speed of pedestrians crossing the street, Q _m =max (Q _left , Q _right ) represents the maximum number of waiting pedestrians.

Preferably, the flashing time of the green light is:

Among them, B represents the length of pedestrian crossing, and V represents the walking speed of pedestrian crossing.

Preferably, data transmission is performed between the detection module and the data processing module through Bluetooth or Wifi.

The present invention also proposes a sensor-based pedestrian crossing traffic signal control method, the specific steps are:

Step 1. When the motorway signal light is green and the crosswalk signal light is red, obtain the number of pedestrians waiting at both ends of the crosswalk;

Step 2. Determine the required lighting time of the green light according to the number of waiting pedestrians, and judge whether the required lighting time of the green light exceeds the set threshold. If it does not exceed the threshold, the green light is turned on according to the set threshold after the red light of the crosswalk ends , if it exceeds the set threshold, the green light of the pedestrian crossing will be turned on according to the required lighting time of the green light after the red light of the pedestrian crossing is over;

Step 3. Detect the speed of pedestrians crossing the street in the last 2-4 seconds when the green light of the crosswalk is on, and determine the flashing time of the green light;

Step 4. According to the determined flashing time of the green light, control the corresponding time of flashing the green light of the crosswalk after the green light is turned on;

Step 5. After the green light of the pedestrian crossing is blinking, control the signal light of the pedestrian crossing to be red, and the signal light of the motorway to be green.

Compared with the prior art, the present invention has the following remarkable advantages: (1) The present invention uses advanced microwave detectors and video detectors, which effectively overcomes the defects of insufficient precision and large errors of traditional induction coils and piezoelectric sensors. (2) The present invention uses a microwave detector to monitor the number of people entering the detection area and the waiting time, and through ultra-high-precision monitoring efficiency, real-time, accurate and fast counting and timing. (3) The present invention comprehensively utilizes the knowledge of intelligent transportation, control, communication, etc., and has the characteristics of high precision, real-time, and high efficiency.

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is an overall structure diagram of a sensor-based pedestrian crossing sensing control device according to the present invention.

Fig. 2 is a flowchart of a sensor-based pedestrian crossing sensing control method according to the present invention.

Fig. 3 is a plan view of Embodiment 1 of the present invention.

Detailed ways

A sensor-based control device for pedestrian crossing traffic lights, including a detection module, a data processing module, a control module, a signal controller and traffic lights, wherein:

The detection module is used to detect the number of pedestrians waiting at both ends of the road and pedestrian crossing speed data;

The data processing module is used to determine the lighting time of the green light and the flashing time of the green light according to the data detected by the detection module;

The signal control machine controls the lighting state and duration of the green light according to the lighting time of the green light and the flickering time of the green light determined by the data processing module.

In a further embodiment, the detection module is a microwave sensor, a video detector or an infrared detector.

In a further embodiment, the detection module is placed at the waiting place of pedestrians at both ends of the zebra crossing, facing the other end of the zebra crossing.

In a further embodiment, the green light lighting time is:

Among them, B represents the length of pedestrian crossing, D represents the width of pedestrian crossing, V represents the walking speed of pedestrians crossing the street, Q _m =max (Q _left , Q _right ) represents the maximum number of waiting pedestrians.

In a further embodiment, the green light flashing time is:

Among them, B represents the length of pedestrian crossing, and V represents the walking speed of pedestrian crossing.

In a further embodiment, data transmission is performed between the detection module and the data processing module through Bluetooth or Wifi.

A sensor-based pedestrian crossing traffic signal control method, the specific steps are:

Step 1. When the motorway signal light is green and the crosswalk signal light is red, obtain the number of pedestrians waiting at both ends of the crosswalk;

Step 2. Determine the required lighting time of the green light according to the number of waiting pedestrians, and judge whether the required lighting time of the green light exceeds the set threshold. If it does not exceed the threshold, the green light is turned on according to the set threshold after the red light of the crosswalk ends , if it exceeds the set threshold, the green light of the pedestrian crossing will be turned on according to the required lighting time of the green light after the red light of the pedestrian crossing ends. The formula for determining the required lighting time of the green light is:

Among them, B represents the length of pedestrian crossing, D represents the width of pedestrian crossing, T represents the maximum waiting time of each batch of pedestrians, V represents the walking speed of pedestrians crossing the street, Q _m = max (Q _left , Q _right ) represents the maximum number of waiting pedestrians.

Step 3. Detect the pedestrian crossing speed in the last 2-4 seconds when the green light of the crosswalk is on, and determine the flashing time of the green light. The formula for determining the flashing time of the green light is:

Among them, B represents the length of pedestrian crossing, and V represents the walking speed of pedestrian crossing.

Step 4. According to the determined flashing time of the green light, control the corresponding time of flashing the green light of the crosswalk after the green light is turned on;

Step 5. After the green light of the pedestrian crossing finishes flashing, control the signal light of the pedestrian crossing to be red, and the signal light of the motorway to be green.

The present invention will be further described below in conjunction with embodiment.

Example 1

As shown in Fig. 3, two infrared detectors are respectively placed at the pedestrian waiting places at both ends of the zebra crossing, facing the other end of the zebra crossing. Speed, the second infrared detector 6 is used to detect the number of pedestrians at the opposite end of the zebra crossing and the walking speed of pedestrians crossing the street.

The two infrared detectors transmit the detected number of pedestrians and pedestrian crossing speed data to the data processing module 8 through Wifi, and the data processing module 8 determines the required lighting time of the green light according to the number of waiting pedestrians and judges the required lighting of the green light Whether the time exceeds the set threshold, if it does not exceed the threshold, then determine that the green light lighting time is the set threshold time, if it exceeds the set threshold, then determine that the green light lighting time is the required lighting time of the green light. The signal control machine 9 lights the green light of the pedestrian crossing according to the green light lighting time determined by the data processing module 8 after the red light of the pedestrian crossing ends. In the last 2 to 4 seconds when the green light of the crosswalk is lit, the infrared detector continues to detect the speed of pedestrians crossing the street, determines the flashing time of the green light and transmits the time to the signal control machine 9, and the signal control machine 9 controls the corresponding time of the green light flashing of the pedestrian crossing after the green light is lit. . In this embodiment, the data processing module selects a single-chip microcomputer, and the specific model is Arduino MEGA2560R3;

Wherein, the formula that the data processing module 8 determines the required lighting time of the green light according to the number of pedestrians waiting is:

In the formula, B represents the length of pedestrian crossing, D represents the width of pedestrian crossing, T represents the maximum waiting time of each batch of pedestrians, V represents the walking speed of pedestrians crossing the street, Q _m = max (Q _left , Q _right ) represents the maximum number of waiting pedestrians.

The formula for determining the blinking time of the green light is:

Among them, B represents the length of pedestrian crossing, and V represents the walking speed of pedestrian crossing.

Claims (9)

1. a kind of sensor-based pedestrian crossing traffic Signalized control device, which is characterized in that including detection module, data Processing module, control module, signal controlling machine and traffic lights, wherein：

The detection module is used to detect the quantity of pedestrian and pedestrian's street crossing walking speed data of road both ends waiting；

When the data that the data processing module is used to be detected according to detection module determine that green light lighting time and green light flicker Between；

The green light lighting time and green light scintillation time that the signal controlling machine is determined according to data processing module control green light Illuminating state and duration.

2. sensor-based pedestrian crossing traffic Signalized control device according to claim 1, which is characterized in that institute Detection module is stated as microwave remote sensor, video detector or infrared detector.

3. sensor-based pedestrian crossing traffic Signalized control device according to claim 1, which is characterized in that institute It states detection module to be placed at the pedestrian's waiting of zebra stripes both ends, the setting of the face zebra stripes other end.

4. sensor-based pedestrian crossing traffic Signalized control device according to claim 1, which is characterized in that green Lamp lighting time is：

Wherein, B represents pedestrian's street crossing length, and D represents crossing width, and V represents pedestrian's street crossing walking speed, Q_m=max (Q_{It is left}, Q_{It is right}) represent to wait for the maximum quantity of pedestrian.

5. sensor-based pedestrian crossing traffic Signalized control device according to claim 1, which is characterized in that green Lamp scintillation time is：

Wherein, B represents pedestrian's street crossing length, and V represents pedestrian's street crossing walking speed.

6. sensor-based pedestrian crossing traffic Signalized control device according to claim 1, which is characterized in that inspection It surveys between module and data processing module and data transfer is carried out by bluetooth or Wifi.

7. a kind of control method based on pedestrian crossing traffic Signalized control device described in claim 1, which is characterized in that The specific steps are：

Step 1, when car lane signal lamp is green light, and pedestrian crosswalk signal lamp is red light, obtain crossing both ends and wait for Pedestrian quantity；

Step 2, the lighting time according to needed for the quantity of the pedestrian of waiting determines green light, judge whether lighting time needed for green light surpasses The threshold value of setting is crossed, if being less than threshold value, is given a green light after crossing red light according to the threshold point of setting, if being more than The threshold value of setting then lights crossing green light after crossing red light according to lighting time needed for green light；

Step 3 lights last 2~4s detections pedestrian crossing speed in crossing green light, determines green light scintillation time；

The determining green light scintillation time of step 4, basis, controls crossing green light shimmery picture seasonable after green light is lighted Between；

After step 5, the flicker of crossing green light, control pedestrian crosswalk signal lamp is red light, and car lane signal lamp is green Lamp.

8. the control method of pedestrian crossing traffic signal lamp according to claim 7, which is characterized in that basis in step 2 The quantity of the pedestrian of waiting determines that the formula of lighting time needed for green light is：

Wherein, B represents pedestrian's street crossing length, and D represents crossing width, and T represents the maximum latency of each batch pedestrian, V Represent pedestrian's street crossing walking speed, Q_m=max (Q_{It is left}, Q_{It is right}) represent to wait for the maximum quantity of pedestrian.

9. the control method of pedestrian crossing traffic signal lamp according to claim 7, which is characterized in that determined in step 3 The formula of green light scintillation time is：

Wherein, B represents pedestrian's street crossing length, and V represents pedestrian's street crossing walking speed.