JP6995119B2 - Safety protection device for full screen doors on rail transport platforms - Google Patents

Description

The present invention relates to the technical field of automatic door sensors, and more particularly to safety protection devices for use in full screen doors.

With the acceleration of urbanization in recent years, the pressure on urban traffic has increased, and more cities are beginning to use rail transport to carry out the necessary mitigation of traffic pressure. The subway is one of the usual urban rail transportation tools. Compared to traditional rail transport tools such as rail, CRH (China High Speed Rail) and high speed rail, subways are often built underground and passengers wait on the platform before the subway enters the station. Due to the congestion of platforms, which often have many subway passengers, safety accidents are likely to occur. Therefore, safety screen doors need to be installed on subway, CRH rail and high speed rail platforms. Ordinary subway screen doors are categorized into full-face screen doors, which are taller than ordinary people's extension, and half-screen doors, which are 1 to 1.5 m high, depending on the height of the door. Full screen doors will have a closed structure if necessary. That is, when the screen door closes, the platform and rails are completely separated. Some full screen doors employ a non-closing structure. That is, a ventilation interval is provided between the top of the screen door and the ceiling of the subway platform.

The subway is convenient for mobile humans, but on the other hand poses a potential safety hazard. To ensure traffic safety, railroad and screen doors must meet certain boundary conditions, and there is a gap between the closed screen door and the train door. If passengers are caught in the gap, a major accident can occur after the train starts.

In order to avoid such a situation, safety protection devices have often been added within the gap spacing in the prior art. However, microwave sensors easily interfere with the movement of passengers or trains, and infrared sensors have poor detection accuracy due to the large divergence angle of the infrared light beam and are easily affected by thermal infrared rays from the train. By comparison, laser sensors, eg, photoelectric sensors with infrared LED source ranges as disclosed in Chinese Patent Application No. 201220345332, have good accuracy and interference resistance properties. In the patent document, a plurality of groups of infrared LED range units and AD sampling units are used to form a light curtain for detection, and the light curtain is between the screen door and the train door so as to function as a safety protection. It is stated that it is provided in the gap.

However, according to the above technique, since multiple groups of infrared laser range units are used, due to the volume limitation of the infrared laser itself, the individual light beams in the laser light curtain have a large spacing between them. Have. As a result, the generation of control signals often follows the control rules at the signal point trigger. That is, as long as one or more light curtains detect the feedback signal, the sensor will generate a control signal, which will result in unnecessary trigger frequency. For example, if there is an object, such as a paper or plastic bag, in the gap and the object is on the laser path, the sensor will generate an alarm signal and abnormally open the screen door. That in turn causes a safety accident.

Further, the detection area of this type of sensor in the prior art needs to be preset according to the size of the door frame of the screen door. For example, the target used by the sensor is a screen door with a width of 4 meters and a height of 2.5 meters, and the corresponding detection area of 4 meters in width and 2.5 meters in height must be preset. , Its fixation and installation position must be strictly restricted, otherwise false triggers caused by the door frame or the ground are extremely prone.

An object of the present invention is to solve the following problems. Existing laser sensors used in screen doors on rail transport platforms are often unnecessarily triggered and their detection area needs to be preset according to the size of the screen door door frame and installation location. The demands are very strict, otherwise false triggers caused by the door frame or the ground are extremely prone.

The present invention provides a safety protection device for use on a full screen, which includes a laser emitting device, a laser deflection device, an optical signal receiving device, and an analysis processing device. The laser light emitting device irradiates the laser deflecting device with a directional laser signal. The laser deflection device deflects the direction of the laser signal by a preset angle under the control of the analysis processing device to form at least one laser scanning sector. The optical signal receiving device receives the returned laser signal and transmits the signal to the analysis processing device.

Alternatively, the laser deflector deflects two adjacent sectors of the laser scan, forming an angular sector between them.

Also, the laser deflector may have polygonal mirrors for deflecting the laser signal, the normals of the mirror surfaces of the polygonal mirrors may be on different planes, and the laser scanning sector may have an angle between them. It is placed between adjacent mirror surfaces so that it can be.

The mirror angle is 0.01 to 10 °.

Alternatively, the laser emitting device irradiates two or more strings of laser signals that do not match each other, and the laser deflector deflects two or more strings of laser signals that do not match each other, and the laser scanning sectors that do not match each other. Form.

Preferably, the safeguards form 2 to 10 laser scanning sectors with an angle between them.

Preferably, the angle between the laser scanning sectors having an angle between them is 0.01-10 °.

Preferably, the sector center angle of the laser scanning sector is 0 to 130 °.

Preferably, the safety protection device is installed at the top of the door frame at the entrance and exit positions of the full screen door, and the laser scanning sector is provided to maximize the coverage of the entrance and exit positions of the screen door. create.

Further, the analysis processing device includes a trigger distance analysis module, a scanning area adjustment module, and a scanning signal analysis module.

In addition, the trigger distance analysis module is used to analyze the distance information from the trigger point generated within the laser scan sector to the safety protection device.

The scan area adjustment module is also used to adjust the profile of the area within the laser scan sector that produces a valid feedback signal.

In addition, the scanning area adjustment module has the following analysis steps,
S1: has a step of scanning in a safe environment, and S2: has a step of recording trigger point distance information when each of the scanning points generates a feedback signal.

The valid feedback signal is a trigger point feedback signal, and the trigger point distance thereof is shorter than the trigger point distance information obtained from step S2.

In addition, the scanning area adjustment module has the following analysis steps,
S3: Using the laser scanning sector as a border and using the trigger point distance information obtained in step S2, the laser scanning sector is further divided into a portion near the sensor and a portion far away from the sensor.

The safety protection device of the present invention also determines the safety environment based on factory settings or based on information provided by other systems on the platform.

Preferably, the information provided by the other systems of the platform is generally information about whether the screen door has been closed, and whether the subway has left the platform or is about to enter the platform. Includes information about that.

Also, the scan signal analysis module does not analyze the trigger point feedback information obtained from the scan in a safe environment.

Further, the approach to analyze the trigger point distance information in step S2 is to first create statistics for the trigger distance information collected in the safe environment for each laser beam as obtained in step S2. And then determine the mean of the group of most frequently repeated data points as the reference point, and then compare the reference points to the reference points of the previous safe period, if they are far from each other. Exchange reference points within the previous safety period for the reference points, perform the next step of the determination if they are close to each other, and finally between the reference points and the reference points of the previous safety period. If the error value is within the preset error value, the reference point within the previous safety period is exchanged for the reference point, and if the error value exceeds the preset error value. Including issuing an error.

Further, in the laser scanning sector, the portion near the sensor is the monitor area, and the effective feedback signal is the trigger point feedback signal generated in the monitor area. The safeguard responds to the trigger signal generated within the monitor area.

Within the laser scanning sector, the far part away from the sensor is the safe area. The safety protection device does not respond to the trigger signal generated within the safety zone.

Further, the scanning signal analysis module analyzes the trigger point distance obtained by the trigger distance analysis module, and then generates a screen door control signal.

Further, the scanning signal analysis module has the following analysis steps.

Step 1: According to the trigger point distance information, it is determined whether or not the trigger is a valid trigger, and if yes, the process proceeds to step 2, and if it is an invalid trigger, the trigger signal is not responded.

Step 2: Based on the information of the trigger point that generates the valid trigger, the graphic information of the trigger area consisting of the trigger points is formed, and it is determined whether or not the graphic information matches the preset human body graphic structure, and if the graphic information matches the preset human body graphic structure. If yes, generate a control signal, if no, go to step 3.

Step 3: Determine if the area of graphical information obtained from step 2 exceeds a preset threshold, if yes, generate a control signal, if no, no control signal End the analysis.

Also, the approach of determining whether the graphic information matches the preset human body graphic structure in step 2 is
(1) Determine if the graphic information has a head-shoulder triangle, if yes, generate a control signal, if no, perform the next analysis step.
(2) It is determined whether or not the graphic information has the graphic structure of the head, torso and legs, and if yes, a control signal is generated, and if no, the process proceeds to step 3.

Further, the approach of determining whether or not the graphic information matches the preset human body graphic structure in step 2 is, first, two or more base points corresponding to each other in the graphic information and the preset human body graphic information. And then scale up or scale up the graphic information to a size corresponding to the preset human body graphic structure based on the graphic information and two or more corresponding base points in the preset human body graphic structure. Scale down and finally compare the scaled up or scaled down graphic information with a preset human body graph to get a graphic profile error and generate a control signal if the error does not exceed the preset threshold. If the error exceeds the preset threshold value, the process proceeds to step 3.

Further, the graphic information and the base points in the preset human body graphic structure are the highest and lowest points in the graphic information and the preset human body graphic structure, respectively, as follows, or the graphic information and the preset human body. The leftmost and rightmost points in the graphic structure.

Also, the approach to get a graphic error by comparing the graphic information with a preset human body graph is to first set two or more reference lines to compare the graphic information and the preset human body graphic structure, and then. , One on the reference line as a reference point to obtain the distance A between the reference point and the intersection of the graphic information profile and the distance B between the reference point and the intersection of the preset human body graphic structure profile. It involves using points and finally creating statistics for the absolute value of the difference between distance A and distance B for each of the reference lines to obtain a graphic profile error.

Furthermore, the analysis processing device further has a start control module for controlling whether or not the safety protection device should transmit a control signal to the screen door.

The start control module also controls the on and off of the laser light emitting device and the laser deflection control module so that the analyzer controls whether or not the corresponding control signal should be generated.

Alternatively, the start control module also controls the on and off of the scan signal analysis module so that the analyzer controls whether or not the corresponding control signal should be generated.

Alternatively, the start control module also controls the signal connection relationship between the scan signal analysis module and the screen door controller to control whether the control signal should be sent to the screen door.

The analysis device also has a laser deflection control module for controlling the deflection angle of the laser deflector.

In addition, the laser scanning sector is located between the full screen door and the transport tool.

Alternatively, the laser scanning sector is parallel to the door leaf of the full screen door.

Alternatively, the laser scan sector forms an angle with respect to the door leaf of the full screen door along the vertical or horizontal direction.

Preferably, the laser forms an angle of 0.01 to 10 ° with the door leaf of the full screen door along the vertical or horizontal direction.

Further, the laser signal emitted from the laser light emitting device is a laser pulse signal.

The invention of the present application has at least one of the following advantages.

1. 1. The technical solution of the present invention uses a laser deflector to continuously deflect an optical signal emitted from a laser source by an angle, thereby meeting the needs of different usage environments with different desires. It is possible to form a laser curtain with density.

2. 2. The technical solution of the present invention uses graphic analysis to determine if a control signal needs to be generated, thereby by a harmless intruder such as a paper or plastic bag in the prior art. Avoid false triggers. On the other hand, the sensitivity of the sensor to non-human intruders can be adjusted by itself if desired, thereby reducing the possibility of false triggers by safe intruders.

3. 3. The technical solution of the present invention is self-adjustable in the size of the desired monitor area to accommodate full screen doors with different sizes and profiles. The relative freedom of installation position is increased and the door frame or ground can effectively reduce the possibility of false triggering of the sensor.

FIG. 1 is a structural diagram of the safety protection device of the present invention. FIG. 2 is a schematic diagram at one installation position of the safety protection device of the present invention. FIG. 3 is a structural diagram of a laser scanning sector in a preset state, which is one of the safety protection devices of the present invention. FIG. 4 is a structural diagram of a laser scanning sector in another preset state of the safety protection device of the present invention. FIG. 5 is a schematic diagram of an intruder appearing in the monitor area of the safety protection device of the present invention.

In order to further clarify the objectives, technical solutions and advantages of the present invention, a detailed description of the present invention is shown below with reference to the drawings. The specific embodiments described here are merely examples and do not limit the invention of the present application.

Embodiment 1
FIG. 2 shows a safety protection device for use with full screen doors. The safety protection device 2 is installed on the door frame 3 of the screen door at the position of the door leaf 1 and is fixed to the leftmost end of the top of the door leaf 1. As shown in FIG. 1, the safety protection device 2 includes a laser light emitting device, a laser deflection device, an optical signal receiving device, and an analysis processing device. The laser light emitting device irradiates the laser deflector with a directional laser signal. The laser deflection device deflects the directional laser signal by a preset angle under the control of the analysis processing device to form the laser scanning sector 4. The optical signal receiving device receives the returned laser signal and transmits the signal to the analysis processing device. The analysis processing device includes a laser deflection control module, a trigger distance analysis module, a scanning area adjustment module, and a scanning signal analysis module. The laser deflection control module is used to control the deflection angle of the laser deflection device. The trigger distance analysis module is used to analyze information on the distance from the trigger point generated within the laser scanning sector to the safety protection device. The scan area adjustment module is used to adjust the profile of the area within the laser scan sector that produces the effective feedback signal. The scanning signal analysis module analyzes the trigger point distance information obtained by the trigger distance analysis module, and then generates a screen door control signal.

The trigger point distance analysis module uses a delay time converter (TDC, time-digital converter) to first calculate the time difference between laser pulse irradiation and regression signal reception. Then, according to the time difference and the speed of light, the computer calculates the flight distance (TOF, flight time) of the optical pulse, that is, the information of the distance between the trigger point and the sensor.

Embodiment 2
The safety protection device 2 for use with a full screen door is installed on the door frame 3 of the screen door at the position of the door leaf 1 and is fixed to the leftmost end of the top of the door leaf 1. As shown in FIG. 1, the safety protection device 2 includes a laser light emitting device, a laser deflection device, an optical signal receiving device, and an analysis processing device. The analysis processing device includes a laser deflection control module, a trigger distance analysis module, a scanning area adjustment module, and a scanning signal analysis module. As shown in FIG. 3, the safety protection device 2 uses itself as a base point in order to form a laser scanning sector 4, which is a sector having a 1/4 circle shape in which one side is vertical and the other side is horizontal. use. The scan area adjustment module has the following analysis steps:
S1: Step to scan in a safe environment,
S2: A step of recording the trigger point distance information when generating each scan point feedback signal,
S3: The laser sector is divided into a portion near the sensor and a portion far away from the sensor based on the boundary line 5 formed by the obtained trigger point distance information. The portion of the laser scanning sector near the sensor is the monitor area 401. The valid feedback signal is a trigger point feedback signal generated within the monitor area 401. The safety protection device responds to the trigger signal generated in the monitor area. The portion within the laser scanning sector far from the sensor is the safe area 402. The safety protection device does not respond to the trigger signal generated within the safety zone 402. The remaining structure is the same as in the first embodiment. With the added scan area adjustment module, the boundaries can be monitored in real time, depending on the actual installation site of the safety protection device and the size of the door frame. Therefore, it is possible to avoid a false trigger by the existing device due to a small error in the installation position or a mismatch in the shape of the door frame, and as a result, the safety performance of the safety protection device is improved and the safety protection device is self-adapted. The function is realized.

Embodiment 3
A safety protection device for use with a full screen door is installed in the door frame 3 of the screen door at the position of the door leaf 1 and is fixed near the leftmost end of the top of the door leaf 1. As shown in FIG. 1, the safety protection device 2 includes a laser light emitting device, a laser deflection device, an optical signal receiving device, and an analysis processing device. The analysis processing device includes a laser deflection control module, a trigger distance analysis module, a scanning area adjustment module, and a device signal analysis module. As shown in FIG. 4, the safety protection device 2 uses itself as a base point to form a fan-shaped laser scanning sector 4 that is horizontal on one side and forms an angle with the door frame 3 on the other side. The center angle of the laser scanning sector 4 can be 110 °. The scanning area adjustment module has the following analysis steps.

S1: A step of scanning in a safe environment. The safe environment here means that the screen door is closed and the transport tool is about to leave or enter the platform altogether.

S2: A step of recording the trigger point distance information when each of the scanning points generates a feedback signal. The approach to analyze the trigger point distance information in step 2 is to first create statistics for the trigger point distance information collected in the safe environment for each laser beam obtained in step 2, and then. Select the mean of the group of data points that are most frequently repeated as reference points, and then compare the reference points to the reference points in the previous safety period, and if they are far from each other, the reference in the previous safety period. Exchange points for the reference point, and if they are close to each other, perform the next step of the determination and finally determine the error value between the reference point and the reference point within the previous safety period. If the error value is within the preset error range, the reference point within the previous safety period is exchanged for the reference point, and if the error value exceeds the preset range, an alarm is sounded. This approach automatically adjusts the range of the monitor area of the sensor, so that the monitor area is a non-hazardous intruder that remains on the ground of the screen door or snuggles up on the door frame, eg paper. , Plastic bags, small paper bags, etc. can adapt to changes in the inner contour of the door frame caused by the residue.

S3: A step of dividing the laser scanning sector into a portion near the sensor and a portion far away from the sensor by the boundary line 5 formed by the obtained trigger point distance information. The portion of the laser scanning sector near the sensor is the monitor area 401. The valid feedback signal is a trigger point feedback signal generated within the monitor area 401. The safeguard responds to the trigger signal generated within the monitor area. The far portion of the laser scanning sector away from the sensor is the safety zone 402. The safety protection device does not respond to the trigger signal generated within the safety zone 402. Other structures are the same as in the first embodiment.

Embodiment 4
A safety protection device for use with a full screen door is installed in the door frame 3 of the screen door at the position of the door leaf 1 and is fixed near the rightmost end of the top of the door leaf 1. As shown in FIG. 1, the safety protection device 2 includes a laser light emitting device, a laser deflection device, an optical signal receiving device, and an analysis processing device. The analysis processing device includes a laser deflection control module, a trigger distance analysis module, a scanning area adjustment module, and a scanning signal analysis module. The scanning area adjustment module has the following analysis steps.

S1: A step of scanning in a safe environment. Here, the safe environment means that the screen door is closed and the transportation tool has completely left or entered the platform. The safety protection device of the present invention can determine the safety environment based on factory settings or information provided by other systems on the platform.

The factory setting may include setting the train arrival time, train departure time, and train stop time according to the train schedule on the platform to be installed.

Information provided by other systems on the platform generally includes information on whether the screen door has been closed and information on whether the train has left or is about to enter the platform. Whether or not the current time interval is a safe environment is determined from the information obtained. For example, the time interval between the time the last train completely departs the platform and the time the next train arrives and stops and the platform begins to control the screen doors to open is a safe environment. The time interval from the time the train arrives at the station and the screen door opens to the time the screen door is about to close is the non-response time interval. The time interval in the range from the time when the screen door closing instruction is received to the time when the train completely leaves the platform is the monitor time interval.

S2: A step of recording the trigger point distance information when each of the scanning points generates a feedback signal. The remaining structure is the same as in the first embodiment.

Embodiment 5
In the safety protection device used in the full screen door according to any of embodiments 2-4, the scanning signal analysis module does not analyze the trigger point feedback information obtained by scanning in a safe environment.

Embodiment 6
A safety protection device for use inside a full-screen screen door, the safety protection device 2 is installed on the door frame 3 of the screen door at the position of the door leaf 1 and fixed near the rightmost end of the top of the door leaf 1. The door. As shown in FIG. 1, the safety protection device 2 includes a laser light emitting device, a laser deflection device, an optical signal receiving device, and an analysis processing device. The analysis processing device includes a laser deflection control module, a trigger distance analysis module, a scanning area adjustment module, and a scanning signal analysis module.

The scanning signal analysis module analyzes the trigger point distance information obtained by the trigger distance analysis module, and then generates a screen door control signal. The scanning signal analysis module has the following analysis steps.

S1: According to the trigger point distance information, it is determined whether or not the trigger is a valid trigger. If yes, the process proceeds to step 2, and if the trigger is invalid, the trigger signal is not responded.

S2: Based on the information of the trigger point that causes the effective trigger, the graphic information of the trigger area consisting of the trigger points is formed, and it is determined whether or not the graphic information matches the preset graphic structure of the human body. If yes, generate a control signal, if no, go to step 3.

S3: It is determined whether or not the area of the graphic information obtained from step 2 exceeds a preset threshold value. If yes, a control signal is generated, and if no, no control signal is generated and the analysis ends. The remaining structure is the same as in the first embodiment.

With the above analysis settings, it is possible to effectively distinguish whether the maintained intruder is a human body-shaped object or a large-sized object. Graphical information that matches the preset graphic structure of the human body means that passengers are likely to be caught in the gap between the screen door and the train. It is a very dangerous situation. Large-sized intruders whose graphic information area is larger than a preset threshold can be passengers or large luggage such as suitcases. It poses a potential danger of train operation and is also a very dangerous situation. Intruders whose graphic information area is not greater than a preset threshold are often small bags, plastic bags, paper bags, pieces of paper, etc., which do not pose a great potential danger of train operation and when a control signal is received. No control signals are generated to avoid the screen doors opening abnormally or the trains stopping abnormally suddenly (they cause damage from secondary accidents).

Embodiment 7
A safety protection device for use in a full screen door according to Embodiment 6, the effective trigger described in step 1 is a trigger signal whose trigger point distance is shorter than the trigger distance information obtained by the scanning area adjustment module. ..

8th embodiment
The safety protection device for use in a full screen door according to Embodiment 6 is such that when a human body-shaped intruder is seen, the scanning signal analysis module produces a silhouette graphic image of the human body-shaped intruder. Can be formed. The approach to determine if the graphic image matches the preset human body graphic structure in step 2 is
(1) A step of determining whether or not the graphic information has a head-shoulder triangle, and if yes, a control signal is generated, and if no, the next analysis step is executed.
(2) It is a step of determining whether or not the graphic information has the graphic information of the head, torso and legs, and if yes, a control signal is generated, and if no, the process proceeds to step 3.

Embodiment 9
In the safety protection device for use in the full screen door according to the sixth embodiment, when a human body-shaped intruder as shown in FIG. 5 appears, the scanning signal analysis module forms a silhouette graphic image of the human body-shaped intruder. can. The approach of determining whether the graphic information matches the preset human body graphic structure in step 2 is to define two or more base points corresponding to each other in each of the graphic information and the preset human body graphic structure. And then scaling up or down the graphic information to the size corresponding to the preset human body graph, based on the graphic information and two or more base points corresponding to each other within the preset human body graphic structure. Comparing the scaled-up or scaled-down graphic information to obtain a graphic profile error with a preset human body graphic structure and generating a control signal if the error does not exceed a preset threshold, if the error is pre-configured. If the set threshold is exceeded, the process proceeds to step 3.

The graphic information and the base points in the preset human body graphic structure are the highest and lowest points in the graphic information and the preset human body graphic structure, or the leftmost and farthest points in the graphic information and the preset human body graphic structure, respectively. It may be at the right end.

The approach of comparing graphic information with a preset human body graphic structure to obtain a graphic profile error is to first set two or more reference lines for comparison with the graphic information and the preset human body graphic structure. After that, one point on the reference line is used as the reference point, the distance A between the reference point and the intersection point of the graphic information profile, and the intersection point of the reference point and the preset human body graphic profile. It involves obtaining the distance B between and finally creating a statistic of the absolute value of the difference between the distance A and the distance B on each reference line to obtain the graphic profile error.

The analysis setting can relatively accurately determine whether or not the graphic information of the intruder matches the human body shape setting. Therefore, it is possible to determine relatively accurately whether or not the intruder is a pinched passenger.

Embodiment 11
The safety protection device 2 for use with a full-screen screen door is installed on the door frame 3 of the screen door at the portion of the door leaf 1 and is fixed in the middle of the top of the door leaf 1. As shown in FIG. 1, the safety protection device 2 includes a laser light emitting device, a laser deflection device, an optical signal receiving device, and an analysis processing device. The analysis processing device includes a laser deflection control module, a trigger distance analysis module, a scanning area adjustment module, a scanning signal analysis module, and a start control module. The start control module is used to control whether the safety protection device should send a control signal to the screen door.

The start control module can control the on and off of the laser irradiation device and the laser deflection control module so that the analyzer controls whether or not the corresponding control signal should be generated. Alternatively, the start control module can control on and off of the scan signal analysis module to control whether the analysis device should generate the corresponding control signal. Alternatively, the start control module can also control the signal coupling relationship between the scan signal analysis module and the screen door controller to control whether the control signal should be sent to the screen door. Other structures are the same as in the first embodiment.

By adding the above module, the safety protection device can be controlled so as not to respond to the trigger signal in the safe environment. Thereby, when the safety protection device detects any safe intruder caught in the safe environment, the screen door is opened abnormally in the safe environment, and the door is opened to the screen door which is likely to cause a safety accident. Avoid sending instructions.

Embodiment 12
A safety protection device for use within a full screen door according to Embodiment 1, where the laser deflection device comprises a first laser deflector and a second laser deflector, as shown in FIG. The first laser deflector is used to deflect the laser signal emitted from the laser light emitting device. The second laser deflector is used to deflect the optical trigger signal to the optical signal receiver.

Embodiment 13
A safety protection device for use within a full screen door, according to Embodiment 1, wherein the laser deflector has a polygonal mirror for deflecting the laser signal, the polygonal mirror being the laser emitting device. It is driven by a drive to rotate at the corresponding frequency. One of the mirror surfaces of a polygonal mirror is deflected to form a laser scan sector.

Embodiment 14
A safety protection device for use in full screen doors according to Embodiment 13, where the mirror surface normals of the polygonal mirrors are on different surfaces so that the laser scanning sectors have an angle between each other. There is a mirror angle between adjacent mirror planes.

In addition to the embodiments described above, the present invention includes the following technical parameters, or a combination thereof.

According to one embodiment of the present invention, the laser deflector can deflect two adjacent laser scanning sectors 4 to form an angled sector between them.

According to one embodiment of the present invention, the laser deflector can be deflected to form 10 sectors with angles between them.

According to one embodiment of the present invention, the laser deflector can be deflected to form six sectors with angles between them.

According to one embodiment of the present invention, the laser deflector can be deflected to form five sectors with angles between them.

According to one embodiment of the present invention, the laser deflector can be deflected to form four sectors with angles between them.

According to one embodiment of the present invention, the laser deflector can be deflected to form three sectors with angles between them.

According to one embodiment of the present invention, the laser deflector can be deflected to form two sectors with an angle between them.

According to one embodiment of the present invention, the angle between the mirror surfaces is 0.01 °. At this point, the angle between adjacent laser scanning sectors is 0.01 °.

According to one embodiment of the present invention, the angle between the mirror surfaces is 10 °. At this point, the angle between adjacent laser scanning sectors is 10 °.

According to one embodiment of the present invention, the angle between the mirror surfaces is 1 °. At this point, the angle between adjacent laser scanning sectors is 1 °.

According to one embodiment of the present invention, the angle between the mirror surfaces is 5 °. At this point, the angle between adjacent laser scanning sectors is 5 °.

According to one embodiment of the present invention, the angle between the mirror surfaces is 0.05 °. At this point, the angle between adjacent laser scanning sectors is 0.05 °.

According to one embodiment of the present invention, the laser emitting device can irradiate two strings of laser signals that do not match each other. The laser deflector deflects the above two strings of laser signals that do not match each other in order to form two laser scanning sectors with an angle between them.

According to one embodiment of the present invention, the laser emitting device can irradiate three strings of laser signals that do not match each other. The laser deflector deflects the above three strings of laser signals that do not match each other in order to form three laser scanning sectors with angles between them.

According to one embodiment of the present invention, the laser emitting device is capable of irradiating four strings of laser signals that do not match each other. The laser deflector deflects four strings of laser signals that do not match each other to form four laser scanning sectors with angles between them.

According to one embodiment of the present invention, the laser emitting device can irradiate five strings of laser signals that do not match each other. The laser deflector deflects five strings of laser signals that do not match each other to form five laser scanning sectors with angles between them.

According to one embodiment of the present invention, the laser emitting device can irradiate six strings of laser signals that do not match each other. The laser deflector deflects the above six strings of laser signals that do not match each other to form six laser scanning sectors with angles between them.

According to one embodiment of the present invention, the laser emitting device can irradiate 10 strings of laser signals that do not match each other. The laser deflector deflects the above 10 strings of laser signals that do not match each other in order to form 10 laser scanning sectors with an angle between them.

According to one embodiment of the present invention, the angle between the laser scanning sectors 4 having an angle between them is 0.01 °.

According to one embodiment of the present invention, the angle between the laser scanning sectors 4 having an angle between them is 1 °.

According to one embodiment of the present invention, the angle between the laser scanning sectors 4 having an angle between them is 0.05 °.

According to one embodiment of the present invention, the angle between the laser scanning sectors 4 having an angle between them is 5 °.

According to one embodiment of the present invention, the angle between the laser scanning sectors 4 having an angle between them is 10 °.

According to one embodiment of the present invention, the central angle of the laser scanning sector 4 is 130 °.

According to one embodiment of the present invention, the center angle of the laser scanning sector 4 is 120 °.

According to one embodiment of the present invention, the center angle of the laser scanning sector 4 is 90 °.

According to one embodiment of the present invention, the central angle of the laser scanning sector 4 is 80 °.

According to one embodiment of the present invention, one side of the laser scanning sector 4 is horizontal and the other side is arranged so as to form an angle with the vertical side surface of the door frame.

According to one embodiment of the present invention, one side of the laser scanning sector 4 is arranged to be horizontal and the other side to be vertical.

According to one embodiment of the present invention, each of the two sides of the laser scanning sector 4 forms an angle with each of the two vertical planes of the door frame.

According to one embodiment of the present invention, the laser scanning sector is parallel to the door leaf of a full screen door.

According to one embodiment of the present invention, the laser scanning sector forms an angle with the door leaf of a full screen door along the vertical or horizontal direction.

According to one embodiment of the present invention, the laser scanning sector forms a 10 ° angle with the door leaf of a full screen door along the vertical or horizontal direction.

According to one embodiment of the present invention, the laser scanning sector forms an angle of 0.01 ° with the door leaf of a full screen door along the vertical or horizontal direction.

According to one embodiment of the present invention, the laser scanning sector forms a 1 ° angle with the door leaf of a full screen door along the vertical or horizontal direction.

The invention of the present application has at least one of the following advantages.

1. 1. The technical solution of the present invention uses a laser deflector to continuously deflect an optical signal emitted from a laser light source by a certain angle. Thereby, it is possible to form a laser curtain having a desired different density that matches the requirements of different usage environments.

2. 2. The technical solution of the present invention uses graphic analysis to determine if a control signal needs to be generated. Thereby, the possibility of false triggering by non-hazardous intruders such as conventional paper or plastic bags can be avoided. On the other hand, the sensitivity of the sensor to non-human invaders can be adjusted as desired by itself. Therefore, the possibility of false triggers by safe intruders is reduced.

3. 3. The technical solution of the present invention can self-adjust the size of the desired monitor area to accommodate full screen doors with different sizes and profiles. The relative freedom of installation position is high, and the possibility of false triggering of the sensor by the door frame or the ground can be relatively reduced.

It will be appreciated that the above description of the invention can be modified and improved in various ways without departing from the ideas and aspects of the invention described in the claims of the present application. Accordingly, the aspects of the technical solutions described in the claims are not limited by any of the particular exemplary teachings given herein.

Chinese Patent Application No. 201220345332

Claims (9)

A safety protection device for full screen doors on rail transport platforms ,
Laser light emitting device and
Laser deflector and
Optical signal receiver and
Equipped with an analysis processing device
The laser light emitting device irradiates the laser deflector with a directional laser signal.
The laser deflector deflects the directional laser signal by a preset angle and forms at least one laser scanning sector under the control of the analysis processing apparatus.
The optical signal receiving device receives the returned laser signal and transmits the signal to the analysis processing device.
The analysis processing device includes a trigger distance analysis module, a scanning area adjustment module, and a scanning signal analysis module.
The trigger distance analysis module is used to analyze information on the distance from the trigger point generated in the laser scanning sector to the safety protection device.
The scanning area adjustment module is used to adjust the profile of the area within the laser scanning sector to generate a valid feedback signal.
The scanning signal analysis module analyzes the trigger point distance information obtained by the trigger distance analysis module, and then generates a screen door control signal.
The scanning signal analysis module executes an analysis step, and the step is
Step 1: Based on the trigger point distance information, it is determined whether or not the trigger is a valid trigger, and if yes, the step proceeds to step 2, and if the trigger is an invalid trigger, the step does not respond to the trigger signal. ,
Step 2: Based on the information of the trigger point that causes the effective trigger, the graphic information of the trigger area consisting of the trigger points is formed, and it is determined whether or not the graphic information and the preset human body graphic structure match. If yes, generate a control signal, if no, go to step 3, and
Step 3: Determine whether the area of the graphic information obtained in step 2 exceeds a preset threshold value, and if yes, generate a control signal, and if no, end the analysis without generating a control signal. With steps
A safety protection device characterized by having . The safety protection device according to claim 1, wherein the analysis processing device further includes a start control module for controlling whether or not the safety protection device should send a control signal to the screen door. The scanning area adjustment module performs an analysis step, which is a step.
S1. Steps to scan in a safe environment and
S2. It has a step of recording trigger point distance information as each of the scanning points produces a feedback signal.
The safety protection device according to claim 1, wherein the effective feedback signal is a trigger point feedback signal whose trigger point distance is shorter than the trigger point distance information obtained in step S2. The analysis step performed by the scanning area adjustment module is
S3. By using the trigger point distance information obtained in step S2 as a border, the laser scanning sector is further divided into a portion close to the sensor and a portion far away from the sensor.
The portion of the laser scanning sector close to the sensor is the monitor area, the effective feedback signal is the trigger point feedback signal generated in the monitor area, and the safety protection device is generated in the monitor area. In response to the trigger signal
The safety according to claim 3, wherein a portion within the laser scanning sector far away from the sensor is a safety zone, and the safety protection device does not respond to a trigger signal generated within the safety zone. Protective device. In step 2, the approach of determining whether or not the graphic information and the preset human body graphic structure match is used .
(1) It is determined whether or not the graphic information has a head-shoulder triangle , and if yes, the control signal is generated, and if no, the next step is executed.
(2) It is determined whether or not the graphic information has the graphic structure of the head, torso and legs , and if yes, the control signal is generated, and if no, the step proceeds to step 3. The safety protection device according to claim 1 . The approach of determining whether or not the graphic information and the preset human body graphic structure match in step 2 is
First, defining two or more corresponding base points for each of the graphic information and the preset human body graphic structure.
Next, the graphic information is scaled up to a size corresponding to the preset human body graphic structure based on the graphic information and the two or more mutually corresponding base points in the preset human body graphic structure. Or to scale down and
Finally, in order to obtain a graphic profile error, the scaled up or scaled down graphic information is compared with the preset human body graphic structure, and if the error does not exceed the preset threshold value, the control signal is generated. The safety protection device according to claim 1 , wherein if the error exceeds the preset threshold value , the process proceeds to step 3. The graphic information and the base point in the preset human body graphic structure are, respectively.
The claim is characterized in that it is the highest point and the lowest point in the graphic information and the preset human body graphic structure, or the leftmost point and the rightmost point in the graphic information and the preset human body graphic structure. The safety protection device according to 6 . The approach of comparing the graphic information with the preset human body graphic structure in order to obtain the graphic profile error is
First, setting two or more reference lines for comparing the graphic information and the preset human body graphic structure, and
Next, one point on the reference line is used as a reference point, the distance A between the reference point and the intersection point of the graphic information profile, and the reference point and the preset human body graphic structure. Obtaining the distance B between the intersection points and
Finally, claim 6 comprises creating a statistic of the absolute value of the difference between the distance A and the distance B at each of the reference lines in order to obtain the graphic profile error. The safety protection device described. The safety protection device according to claim 1, wherein the laser scanning sector is arranged between the door leaf of the front screen door and the transportation tool.

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