阅读说明：本技术 一种自动扶梯测速系统、方法、装置及存储介质 (Escalator speed measurement system, method and device and storage medium ) 是由 林新建 黄金福 余佳鑫 陆庭锴 刘栋 王新军 陈彦明 陈永金 李淼 张大明 于 2021-08-02 设计创作，主要内容包括：本发明公开了一种自动扶梯测速系统、方法、装置及存储介质,该系统通过图像采集模块采集乘客搭乘扶梯的视频,然后通过视频分析模块分析图像采集模块采集的视频,获取同一乘客在第一时刻和第二时刻的姿态；再通过计算模块,根据同一乘客在第一时刻和第二时刻的姿态,计算得到扶手带相对于梯级的运行速度；本发明能够通过检测人体姿态的相对变化,准备计算得到扶手带相对于梯级的运行速度；再结合扶手带测速模块测量得到的扶手带的运行速度,和梯级测速模块测量得到的梯级的运行速度；判断内扶手带的速度是否在合理范围区间及判断扶手带测速模块或梯级测速模块是否正常运行。本发明可广泛应用于自动扶梯测速技术领域。(The invention discloses a speed measuring system, a speed measuring method, a speed measuring device and a storage medium for an escalator, wherein the system acquires videos of passengers riding the escalator through an image acquisition module, and then analyzes the videos acquired by the image acquisition module through a video analysis module to acquire postures of the same passenger at a first moment and a second moment; then, calculating the running speed of the handrail relative to the steps according to the postures of the same passenger at the first moment and the second moment through a calculation module; the invention can obtain the running speed of the hand strap relative to the steps by detecting the relative change of the human body posture and preparing calculation; then the running speed of the handrail belt obtained by measuring the speed measuring module of the handrail belt and the running speed of the steps obtained by measuring the speed measuring module of the steps are combined; judging whether the speed of the inner hand strap is in a reasonable range and judging whether the speed measuring module of the hand strap or the step speed measuring module runs normally. The escalator speed measurement device can be widely applied to the technical field of escalator speed measurement.)

1. An escalator speed measuring system, characterized by, includes:

the image acquisition module is used for acquiring a video of a passenger riding the escalator;

the video analysis module is used for analyzing the video acquired by the image acquisition module and acquiring the postures of the same passenger at a first moment and a second moment;

the calculation module is used for calculating a first speed according to the postures of the same passenger at a first moment and a second moment, wherein the first speed is the running speed of the handrail relative to the steps;

the handrail belt speed measuring module is used for measuring a second speed, and the second speed is the running speed of the handrail belt;

the step speed measuring module is used for measuring a third speed, and the third speed is the running speed of the steps;

and the escalator monitoring module is used for judging whether the speed of the hand strap is within a reasonable range interval or not and judging whether the hand strap speed measuring module or the step speed measuring module runs normally or not according to the first speed, the second speed and the third speed.

2. An escalator speed measurement system according to claim 1, wherein said video analysis module comprises:

a first positioning unit for positioning a first intersection point and a second intersection point, wherein the first intersection point is an intersection point of the palm of the target passenger and the handrail belt at a first moment, and the second intersection point is an intersection point of the shoulder center line of the target passenger and the handrail belt center line at the first moment;

the first acquisition unit is used for acquiring a first distance and a first included angle, wherein the first distance is the distance between the first intersection point and the second intersection point, and the first included angle is the included angle between the shoulder center line of the target passenger and the handrail belt center line at the first moment;

a second positioning unit for positioning a third intersection point and a fourth intersection point, wherein the third intersection point is an intersection point of the palm of the target passenger and the handrail belt at the second moment, and the fourth intersection point is an intersection point of the shoulder center line of the target passenger and the handrail belt center line at the second moment;

and the second acquisition unit is used for acquiring a second distance and a second included angle, the second distance is the distance between the third intersection point and the fourth intersection point, and the second included angle is the included angle between the shoulder central line of the target passenger and the handrail belt central line at the second moment.

3. The escalator speed measurement system according to claim 2, wherein said calculation module is configured to perform the following calculations when said first included angle is equal to said second included angle:

calculating a first distance difference, which is a distance difference between the first distance and the second distance;

calculating a first time difference, wherein the first time difference is a time difference between the first time and the second time;

and calculating to obtain a first speed according to the first distance difference and the first time difference.

4. The escalator speed measurement system according to claim 3, wherein said calculation module is further configured to perform the following calculations:

calculating first speeds of at least more than N same passengers, and calculating an average value of the first speeds of more than N same passengers;

alternatively, the first speeds of the same passenger are calculated for N consecutive passengers or more, and the average value of the first speeds of the same passenger is calculated for N consecutive passengers or more.

5. An escalator speed measurement system according to claim 1, wherein the escalator monitoring module comprises:

a first determining unit for determining that the running speed of the handrail belt relative to the steps is normal when a first tolerance is within a range of 0-2%, wherein the first tolerance is a relative tolerance between the first speed and the third speed;

the second determining unit is used for determining that the handrail belt runs at an overspeed when the first tolerance is larger than 2%;

a third determining unit, configured to determine that the handrail belt is running too slowly when the first tolerance is less than 0;

a fourth determining unit, configured to determine that the handrail belt speed measuring module or the stair speed measuring module is not in normal operation when a first speed difference is not equal to the first speed and a tolerance between the first speed difference and the first speed is greater than 2% with respect to the first speed difference, where the first speed difference is a difference between the second speed and the third speed.

6. An escalator speed measurement system according to claim 1, further comprising:

the handrail belt speed control module is used for controlling the running speed of the handrail belt;

the step speed control module is used for controlling the running speed of the steps;

the escalator monitoring module is also used for controlling the step speed control module to adjust the step running speed and controlling the hand strap speed control module to adjust the hand strap running speed when judging that the hand strap speed is not in a reasonable range.

7. An escalator speed measurement system according to claim 1, characterized in that, said system further comprises an alarm module for making an audible and visual alarm in at least one of the following situations:

after the step running speed and the hand strap running speed are adjusted, detecting that the speed of the hand strap is not in a reasonable range;

alternatively, the first and second electrodes may be,

and determining that the speed measuring module of the hand strap or the step speed measuring module abnormally operates according to the first speed, the second speed and the third speed.

8. An escalator speed measurement method is characterized by comprising the following steps:

collecting a video of a passenger riding an escalator;

analyzing the video to acquire the postures of the same passenger at the first moment and the second moment;

calculating to obtain a first speed according to the postures of the same passenger at the first moment and the second moment, wherein the first speed is the running speed of the hand strap relative to the steps;

measuring a second speed, wherein the second speed is the running speed of the handrail belt;

measuring a third speed, wherein the third speed is the running speed of the steps;

and judging whether the speed of the hand strap is within a reasonable range or not and judging whether the speed measuring module of the hand strap or the step speed measuring module runs normally or not according to the first speed, the second speed and the third speed.

9. The utility model provides an automatic staircase speed sensor which characterized in that includes:

at least one processor;

at least one memory for storing at least one program;

when executed by the at least one processor, cause the at least one processor to implement the method of claim 8.

10. Computer-readable storage medium, on which a processor-executable program is stored, which, when being executed by a processor, is adapted to carry out the method of claim 8.

Technical Field

The invention relates to the technical field of escalator speed measurement, in particular to an escalator speed measurement system, method and device and a storage medium.

Background

The escalator is used as special equipment for carrying people in an upward or downward inclined manner, is widely applied to places with large people flow, such as shopping malls, stations, subway stations and the like, and has safety performance related to the life safety of the general public. The escalator comprises two important components, namely a hand strap and steps, when a passenger uses the escalator, feet stand on the steps, hands hold the hand strap, and the hand strap and the steps move in the same direction, so that the function of carrying the passenger is realized.

For passenger safety, the speed of the handrail belt and the steps must be set reasonably. On the one hand, if the speed of the handrail belt is slower than that of the steps, the passengers may fall down and lean backwards; on the other hand, if the speed of the handrail belt is too much faster than the speed of the steps, the passenger may be caused to lean forward. For this, the national standard GB16899-2011 stipulates: under normal operating conditions, the allowable error of the operating speed of the handrail belt relative to the actual speed of the steps, the pedals or the adhesive tapes is 0-2%, namely the operating speed of the handrail belt is 0-2% faster than the operating speed of the steps. In the prior art, the speeds of steps and a hand strap are respectively measured mainly through a sensor, and whether the two speed differences are in a reasonable range is calculated. When a sensor, a handrail belt, a step or a driving mechanism has a fault, if the fault cannot be detected in time, a danger is caused to passengers using the escalator.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an escalator speed measuring system, method, device and storage medium.

The technical scheme adopted by the invention is as follows:

on one hand, the embodiment of the invention comprises an escalator speed measuring system, which comprises:

the image acquisition module is used for acquiring a video of a passenger riding the escalator;

the video analysis module is used for analyzing the video acquired by the image acquisition module and acquiring the postures of the same passenger at a first moment and a second moment;

the calculation module is used for calculating a first speed according to the postures of the same passenger at a first moment and a second moment, wherein the first speed is the running speed of the handrail relative to the steps;

the handrail belt speed measuring module is used for measuring a second speed, and the second speed is the running speed of the handrail belt;

the step speed measuring module is used for measuring a third speed, and the third speed is the running speed of the steps;

and the escalator monitoring module is used for judging whether the speed of the hand strap is within a reasonable range interval or not and judging whether the hand strap speed measuring module or the step speed measuring module runs normally or not according to the first speed, the second speed and the third speed.

Further, the video analysis module comprises:

a first positioning unit for positioning a first intersection point and a second intersection point, wherein the first intersection point is an intersection point of the palm of the target passenger and the handrail belt at a first moment, and the second intersection point is an intersection point of the shoulder center line of the target passenger and the handrail belt center line at the first moment;

the first acquisition unit is used for acquiring a first distance and a first included angle, wherein the first distance is the distance between the first intersection point and the second intersection point, and the first included angle is the included angle between the shoulder center line of the target passenger and the handrail belt center line at the first moment;

a second positioning unit for positioning a third intersection point and a fourth intersection point, wherein the third intersection point is an intersection point of the palm of the target passenger and the handrail belt at the second moment, and the fourth intersection point is an intersection point of the shoulder center line of the target passenger and the handrail belt center line at the second moment;

and the second acquisition unit is used for acquiring a second distance and a second included angle, the second distance is the distance between the third intersection point and the fourth intersection point, and the second included angle is the included angle between the shoulder central line of the target passenger and the handrail belt central line at the second moment.

Further, the calculation module is configured to perform the following calculation when the first included angle is equal to the second included angle:

calculating a first distance difference, which is a distance difference between the first distance and the second distance;

calculating a first time difference, wherein the first time difference is a time difference between the first time and the second time;

and calculating to obtain a first speed according to the first distance difference and the first time difference.

Further, the calculation module is further configured to perform the following calculations:

calculating first speeds of at least more than N same passengers, and calculating an average value of the first speeds of more than N same passengers;

alternatively, the first speeds of the same passenger are calculated for N consecutive passengers or more, and the average value of the first speeds of the same passenger is calculated for N consecutive passengers or more.

Further, the staircase monitoring module includes:

a first determining unit for determining that the running speed of the handrail belt relative to the steps is normal when a first tolerance is within a range of 0-2%, wherein the first tolerance is a relative tolerance between the first speed and the third speed;

the second determining unit is used for determining that the handrail belt runs at an overspeed when the first tolerance is larger than 2%;

a third determining unit, configured to determine that the handrail belt is running too slowly when the first tolerance is less than 0;

a fourth determining unit, configured to determine that the handrail belt speed measuring module or the stair speed measuring module is not in normal operation when a first speed difference is not equal to the first speed and a tolerance between the first speed difference and the first speed is greater than 2% with respect to the first speed difference, where the first speed difference is a difference between the second speed and the third speed.

Further, the system further comprises:

the handrail belt speed control module is used for controlling the running speed of the handrail belt;

the step speed control module is used for controlling the running speed of the steps;

the escalator monitoring module is also used for controlling the step speed control module to adjust the step running speed and controlling the hand strap speed control module to adjust the hand strap running speed when judging that the hand strap speed is not in a reasonable range.

Further, the system also comprises an alarm module, and the alarm module is used for giving an audible and visual alarm under at least one condition of the following conditions:

after the step running speed and the hand strap running speed are adjusted, detecting that the speed of the hand strap is not in a reasonable range;

alternatively, the first and second electrodes may be,

and determining that the speed measuring module of the hand strap or the step speed measuring module abnormally operates according to the first speed, the second speed and the third speed.

On the other hand, the embodiment of the invention comprises an escalator speed measuring method, which comprises the following steps:

collecting a video of a passenger riding an escalator;

analyzing the video to acquire the postures of the same passenger at the first moment and the second moment;

calculating to obtain a first speed according to the postures of the same passenger at the first moment and the second moment, wherein the first speed is the running speed of the hand strap relative to the steps;

measuring a second speed, wherein the second speed is the running speed of the handrail belt;

measuring a third speed, wherein the third speed is the running speed of the steps;

and judging whether the speed of the hand strap is within a reasonable range or not and judging whether the speed measuring module of the hand strap or the step speed measuring module runs normally or not according to the first speed, the second speed and the third speed.

In another aspect, an embodiment of the present invention includes an escalator speed measurement device, including:

at least one processor;

at least one memory for storing at least one program;

when the at least one program is executed by the at least one processor, the at least one processor is enabled to realize the escalator speed measuring method.

In another aspect, the embodiments of the present invention include a computer-readable storage medium having a program stored thereon, the program being executable by a processor, and the program being executable by the processor to implement the escalator speed measuring method.

The invention has the beneficial effects that:

the video of a passenger riding the escalator is collected through the image collection module, and then the video collected by the image collection module is analyzed through the video analysis module to obtain the postures of the same passenger at the first moment and the second moment; then, calculating the running speed of the handrail relative to the steps according to the postures of the same passenger at the first moment and the second moment through a calculation module; the invention can obtain the running speed of the hand strap relative to the steps by detecting the relative change of the human body posture and preparing calculation; then the running speed of the handrail belt obtained by measuring the speed measuring module of the handrail belt and the running speed of the steps obtained by measuring the speed measuring module of the steps are combined; judging whether the speed of the inner hand strap is in a reasonable range and judging whether the speed measuring module of the hand strap or the step speed measuring module runs normally.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an escalator speed measuring system according to an embodiment of the invention;

fig. 2 is a schematic view of an image of a passenger riding an escalator according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating the relative positions of the human body and the handrail when a passenger gets on the escalator according to the embodiment of the present invention;

FIG. 4 shows an embodiment of the present invention at the T₁The relative position schematic diagram of the human body and the hand strap at the moment;

FIG. 5 shows an embodiment of the present invention at the Tth position₂The relative position schematic diagram of the human body and the hand strap at the moment;

fig. 6 is a flow chart illustrating steps of a method for measuring speed of an escalator according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an escalator speed measuring device according to an embodiment of the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, and the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood to exclude the essential numbers. If there is a description to first, second, third etc. for the purpose of distinguishing between technical features, it is not intended to indicate or imply relative importance or to implicitly indicate the number of technical features indicated or to implicitly indicate the precedence of technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1, an embodiment of the present invention provides an escalator speed measurement system, including:

the image acquisition module 100 is used for acquiring a video of a passenger riding the escalator;

the video analysis module 200 is used for analyzing the video acquired by the image acquisition module and acquiring the postures of the same passenger at the first moment and the second moment;

the calculation module 300 is configured to calculate a first speed according to postures of the same passenger at a first time and a second time, where the first speed is a running speed of the handrail belt relative to the steps;

the handrail belt speed measuring module 400 is used for measuring a second speed, and the second speed is the running speed of the handrail belt;

the step speed measuring module 500 is used for measuring a third speed, and the third speed is the running speed of the steps;

the escalator monitoring module 600 is configured to determine whether the speed of the handrail belt is within a reasonable range and determine whether the speed measuring module or the step speed measuring module operates normally according to the first speed, the second speed and the third speed.

In the embodiment, the image acquisition module adopts a binocular camera or a TOF (time of flight) and a common camera to acquire the video of the passenger when the passenger takes the escalator. Wherein, at least two cameras are arranged right above the center line of the inclined part of the escalator, and the shooting direction is vertical to the step direction of the escalator. The shooting ranges of two adjacent cameras are repeated to a certain extent, and at least one same step can be shot simultaneously. The cameras have a person tracking function and can communicate with each other to synchronize information such as a clock, a shared screen, and a person number. The person number of the same person at the first camera is the same as the person number of the adjacent camera and does not change. People with the same number cannot exist in the pictures of all the cameras at the same moment. In addition, the camera takes a picture in the case where the center line of the steps, the center line of the shoulders, and the center line of the head where the passenger stands are on the same straight line, and the overhead distance from the camera is the shortest.

In this embodiment, the video analysis module 200 includes:

a first positioning unit 201 for positioning a first intersection point and a second intersection point, wherein the first intersection point is an intersection point of the palm of the target passenger and the handrail belt at a first moment, and the second intersection point is an intersection point of the shoulder central line of the target passenger and the handrail belt central line at the first moment;

a first obtaining unit 202, configured to obtain a first distance and a first included angle, where the first distance is a distance between a first intersection point and a second intersection point, and the first included angle is an included angle between a shoulder center line of a target passenger and a handrail center line at a first time;

a second positioning unit 203 for positioning a third intersection point and a fourth intersection point, the third intersection point being an intersection point of the palm of the target passenger and the handrail belt at the second moment, the fourth intersection point being an intersection point of the centerline of the shoulder of the target passenger and the centerline of the handrail belt at the second moment;

the second obtaining unit 204 is configured to obtain a second distance and a second included angle, where the second distance is a distance between the third intersection and the fourth intersection, and the second included angle is an included angle between the center line of the shoulder of the target passenger and the center line of the handrail belt at the second moment.

In this embodiment, the video acquired by the image acquisition module is analyzed by the video analysis module, and referring to fig. 2 and 3, the acquired video may be processed first to obtain an image of a required passenger specific posture, the passenger specific posture is that a step centerline, a shoulder centerline and a head centerline on which a passenger stands are in the same straight line, and a hand of the passenger is put on the handrail belt. Specifically, a target passenger, which is a passenger with his or her hands on a handrail belt, may be determined first, and then images when the step center line, the shoulder center line, and the head center line on which the target passenger stands are on the same straight line may be acquired. Specifically, referring to fig. 4, T is acquired by the camera 1₁The image of the moment is that the intersection point P1 of the palm of the passenger and the handrail belt is located, the intersection point P2 of the center line A of the passenger's shoulder and the center line B of the handrail belt is located, and the included angle between the center line A of the passenger's shoulder and the center line B of the handrail belt is determined and is marked as K1. The distance between the intersection point P1 and the intersection point P2 is obtained and is marked as C₁. Likewise, referring to fig. 5, T is acquired by the camera 2₂Image of time, acquired T₂The image at the moment is the image of the same passenger with the same posture kept unchanged. Since in this image the position of the passenger remains unchanged, the intersection P1 of the palm of the passenger's hand with the handrail belt is also located, the intersection P2 of the centre line a of the passenger's shoulders with the centre line B of the handrail belt is located, and the angle between the centre line a of the passenger's shoulders and the centre line B of the handrail belt is determined, denoted K2. The distance between the intersection point P1 and the intersection point P2 is obtained and is marked as C₂. At T₁To T₂Meanwhile, since the passenger maintains the posture, K1 and K2 are equal.

In this embodiment, the calculating module 300 is configured to perform the following calculation when the first included angle is equal to the second included angle:

calculating a first distance difference, which is a distance difference between the first distance and the second distance;

calculating a first time difference, wherein the first time difference is a time difference between a first moment and a second moment;

and calculating to obtain a first speed according to the first distance difference and the first time difference.

In this embodiment, the calculation modules can respectively calculate C₁And C₂A distance difference of (a), and T₁Time and T₂The time difference between the moments, then by formulaAnd calculating the speed of the hand strap relative to the steps.

Optionally, the calculation module 300 is further configured to perform the following calculation:

calculating first speeds of at least more than N same passengers, and calculating an average value of the first speeds of more than N same passengers;

alternatively, the first speeds of the same passenger are calculated for N consecutive passengers or more, and the average value of the first speeds of the same passenger is calculated for N consecutive passengers or more.

In this embodiment, in order to more accurately calculate the speed of the handrail belt relative to the steps, the first speeds of at least N same passengers are calculated, and the average value of the first speeds of the N same passengers is calculated as the final speed of the handrail belt relative to the steps. Alternatively, the first speeds of the consecutive N or more same passengers are calculated, and the average value of the first speeds of the consecutive N or more same passengers is calculated as the final speed of the handrail belt relative to the steps.

Specifically, after the speeds of the N handrail belts relative to the steps are calculated, the speeds are calculated through a formulaCalculating to obtain the average speed value of the hand strap relative to the steps; in the formula, V_rmaxFor the maximum value, V, of the calculated speeds of the N handrails with respect to the steps_rminIs the minimum value of the calculated speeds of the N hand straps relative to the steps. In this embodiment, when the escalator is long, 3 or 4 cameras may be installed, and at this time, T may be continuously obtained by the camera 3₃Images of time of day, then T is acquired₃Time point P1 and cross pointDistance P2, denoted C₃. Likewise, C is calculated separately₃And C₂A distance difference of (a), and T₃Time and T₂The time difference between the moments, then by formulaCalculating to obtain the speed of the hand strap relative to the steps; likewise, in order to calculate the speed of the handrail belt relative to the steps more accurately, the first speeds of at least N or more identical passengers may be calculated, or the first speeds of consecutive N or more identical passengers may be calculated, and then the average of the N first speeds is calculated as the final speed of the handrail belt relative to the steps. Likewise, acquisition of T by the camera 4₄Images of time of day, then T is acquired₄The distance between the time point P1 and the point P2 is denoted as C₄. Respectively calculate C₃And C₄A distance difference of (a), and T₃Time and T₄The time difference between the moments, then by formulaCalculating to obtain the speed of the hand strap relative to the steps; likewise, in order to calculate the speed of the handrail belt relative to the steps more accurately, the first speeds of at least N or more identical passengers may be calculated, or the first speeds of consecutive N or more identical passengers may be calculated, and then the average of the N first speeds is calculated as the final speed of the handrail belt relative to the steps. Finally, the formula is passedCalculating the average value of the speeds of the hand strap relative to the steps in each time period, and taking the average value as the final speed of the hand strap relative to the steps; in the formula (I), the compound is shown in the specification,is at T₁To T₂The average value of the speed of the hand strap relative to the steps calculated in the period,is at T₂To T₃The average value of the speed of the hand strap relative to the steps calculated in the period,is at T₃To T₄During which the average value of the speed of the handrail belt relative to the steps is calculated.

In this embodiment, the escalator monitoring module 400 includes:

a first determining unit 401 for determining that the running speed of the handrail belt with respect to the steps is normal when a first tolerance is in a range of 0-2%, the first tolerance being a relative tolerance of the first speed and the third speed;

a second determining unit 402, configured to determine that the handrail belt is running at an excessive speed when the first tolerance is greater than 2%;

a third determining unit 403, configured to determine that the handrail belt is running too slowly when the first tolerance is less than 0%;

a fourth determining unit 404, configured to determine that the handrail belt speed measuring module or the stair speed measuring module is not in normal operation when the first speed difference is not equal to the first speed and a tolerance between the first speed difference and the first speed is greater than 2% with respect to the first speed difference, where the first speed difference is a difference between the second speed and the third speed.

In this embodiment, the escalator monitoring module first obtains the speed V of the handrail belt relative to the steps calculated by the calculating module_rThe running speed V of the hand strap is measured by the hand strap speed measuring module_fAnd the running speed V of the step measured by the step test module_t(ii) a And then judging whether the speed of the inner hand strap is in a reasonable range or not and judging whether the hand strap speed measuring module or the step speed measuring module normally runs or not according to the speed of the hand strap relative to the steps, the running speed of the hand strap and the running speed of the steps. Specifically, if 0 is less than or equal to (V)_r/V_t) And determining that the relative running speed of the hand strap and the steps is normal if 100% is less than or equal to 2%. If (V)_r/V_t)*100％>2%, the handrail belt is considered to be overspeed; at the moment, the escalator monitoring module is communicated with the step speed control module and the handrail belt speedAnd the control module adjusts the speed of the steps and the hand strap so as to ensure that the hand strap and the steps run in a reasonable speed range. If (V)_r/V_t)*100％<0, determining that the speed of the handrail is too low; at this time, similarly, the escalator monitoring module adjusts the speed of the steps and the hand strap through the step speed control module and the hand strap speed control module so as to enable the hand strap and the steps to run in a reasonable speed range. In ideal case V_R＝V_t-V_f＝V_rIf V is_R＝V_t-V_f≠V_rAnd is andand determining that the speed measuring module of the hand strap or the step speed measuring module abnormally operates.

Optionally, referring to fig. 1, the system further comprises:

a handrail belt speed control module 700 for controlling the running speed of the handrail belt;

a step speed control module 800 for controlling the operation speed of the steps;

the escalator monitoring module 300 is further configured to control the step speed control module to adjust the step running speed and control the handrail speed control module to adjust the handrail running speed when the speed of the handrail is determined not to be within the reasonable range.

In this embodiment, when the escalator monitoring module detects (V)_r/V_t)*100％>2% or (V)_r/V_t)*100％<And 0, namely when the speed of the hand strap is detected to be out of the reasonable range, the step speed control module is controlled to adjust the step running speed and the hand strap speed control module is controlled to adjust the hand strap running speed, so that the speed of the hand strap is in the reasonable range.

Optionally, referring to fig. 1, the system further comprises an alarm module 900, wherein the alarm module 900 is configured to alarm in a sound and light manner in at least one of the following situations:

after the step running speed and the hand strap running speed are adjusted, detecting that the speed of the hand strap is not in a reasonable range;

alternatively, the first and second electrodes may be,

and determining abnormal operation of the handrail belt speed measuring module or the step speed measuring module according to the first speed, the second speed and the third speed.

In this embodiment, because the steps have speed limitation, when it is detected that the speed of the handrail belt is not within the reasonable range, the step speed control module can be controlled to adjust the step running speed and the handrail belt speed control module can be controlled to adjust the handrail belt running speed, and if the speed of the handrail belt still cannot be within the reasonable range after adjustment, sound and light alarm is performed. If V is detected_R＝V_t-V_f≠V_rAnd is andand determining that the speed measuring module of the hand strap or the step speed measuring module abnormally operates, and carrying out sound-light alarm at the moment.

The embodiment of the invention provides an escalator speed measuring system which has the following technical effects:

according to the embodiment of the invention, the video of a passenger riding the escalator is acquired through the image acquisition module, and then the video acquired by the image acquisition module is analyzed through the video analysis module to acquire the postures of the same passenger at the first moment and the second moment; then, calculating the running speed of the handrail relative to the steps according to the postures of the same passenger at the first moment and the second moment through a calculation module; the invention can obtain the running speed of the hand strap relative to the steps by detecting the relative change of the human body posture and preparing calculation; then the running speed of the handrail belt obtained by measuring the speed measuring module of the handrail belt and the running speed of the steps obtained by measuring the speed measuring module of the steps are combined; judging whether the speed of the inner hand strap is in a reasonable range and judging whether the speed measuring module of the hand strap or the step speed measuring module runs normally.

Referring to fig. 6, an embodiment of the present invention further provides a speed measurement method for an escalator, including, but not limited to, the following steps:

s100, collecting a video of a passenger riding an escalator;

s200, analyzing the video to obtain the postures of the same passenger at the first moment and the second moment;

s300, calculating to obtain a first speed according to postures of the same passenger at a first moment and a second moment, wherein the first speed is the running speed of the hand strap relative to the steps;

s400, measuring a second speed, wherein the second speed is the running speed of the handrail belt;

s500, measuring a third speed, wherein the third speed is the running speed of the steps;

s600, judging whether the speed of the hand strap is within a reasonable range or not and judging whether the speed measuring module of the hand strap or the step speed measuring module normally runs or not according to the first speed, the second speed and the third speed.

The contents in the system embodiment shown in fig. 1 are all applicable to the method embodiment, the functions implemented in the method embodiment are the same as those in the system embodiment shown in fig. 1, and the beneficial effects achieved by the method embodiment are also the same as those achieved by the system embodiment shown in fig. 1.

Referring to fig. 7, an embodiment of the present invention further provides an escalator speed measuring device 200, which specifically includes:

at least one processor 210;

at least one memory 220 for storing at least one program;

when the at least one program is executed by the at least one processor 210, the at least one processor 210 is caused to implement the method as shown in fig. 6.

The memory 220, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs and non-transitory computer-executable programs. The memory 220 may include high speed random access memory and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 220 may optionally include remote memory located remotely from processor 210, and such remote memory may be connected to processor 210 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

It will be understood that the device structure shown in fig. 7 does not constitute a limitation of device 200, and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.

In the apparatus 200 shown in fig. 7, the processor 210 may retrieve the program stored in the memory 220 and execute, but is not limited to, the steps of the embodiment shown in fig. 6.

The above-described embodiments of the apparatus 200 are merely illustrative, and the units illustrated as separate components may or may not be physically separate, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purposes of the embodiments.

Embodiments of the present invention also provide a computer-readable storage medium, which stores a program executable by a processor, and the program executable by the processor is used to implement the method shown in fig. 6 when being executed by the processor.

The embodiment of the application also discloses a computer program product or a computer program, which comprises computer instructions, and the computer instructions are stored in a computer readable storage medium. The computer instructions may be read by a processor of a computer device from a computer-readable storage medium, and executed by the processor, to cause the computer device to perform the method illustrated in fig. 6.

It will be understood that all or some of the steps, systems of methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.