Intelligent light curtain control system for industrial door

Abstract

The invention relates to the technical field of industrial door light curtains, in particular to an intelligent light curtain control system for an industrial door. According to the system, a plurality of light beams are generated through the action of a plurality of light emitters and a plurality of corresponding light receivers, and a light curtain is formed based on the light beams; the door body sequentially shields the light beams when moving along the motion path; counting the number of the optical receivers with interrupted optical signal reception in real time through a counting module, and recording the number as the number of shielded receivers; the analysis module determines the operation state of the door body according to the number of the shielding receivers in single monitoring and generates a corresponding instruction; a control module determines that a statistical module continuously monitors a plurality of light receivers based on an instruction, and determines that the door body stops descending and ascends to an initial position or determines the ascending speed of the door body; thus, the operation state of the door body is controlled according to the instruction, then intelligent control over the door body is achieved, the real-time control capacity of the door body is improved, and therefore the safety of personnel or goods passing through the industrial door is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial door light curtains, and particularly to an intelligent light curtain control system for industrial doors. Background Art

[0002] As a key facility in modern factories, warehouses, and logistics hubs, the functionality, safety, and space utilization rate of industrial doors directly affect the operating efficiency of industrial scenarios. Most existing industrial doors are equipped with light curtain devices with a blanking function. Through the light curtain, it can distinguish whether the interruption of the light beam is caused by a person or an object or by a descending rolling door or vertical door, thereby protecting passing pedestrians or objects.

[0003] Currently, the Chinese patent publication number: CN103628797A in the prior art provides a light curtain type safety rolling door. This technical solution installs linear guide grooves inside two columns, installs both sides of the door curtain in the corresponding linear guide grooves, then installs the light curtain emission device below the linear guide groove of one column, and installs the light curtain receiving device below the linear guide groove of the other column, so as to install both the light curtain and the door curtain in the door frame composed of columns, thereby protecting the stability of the mechanism. However, this technical solution still only aims to achieve the blanking function of the light curtain and protect the light curtain, lacking the ability to monitor the light curtain to determine the occlusion situation, and then determine the corresponding processing instructions, and control the running state of the door curtain according to the instructions, so as to realize the intelligent control of the door curtain operation and improve the real-time control ability of the door body. Summary of the Invention

[0004] Therefore, the present invention provides an intelligent light curtain control system for industrial doors to overcome the problem in the prior art that there is a lack of monitoring of the receivers in the light curtain to determine how to control the running state of the door body, thereby realizing the intelligent control of the door body and improving the safety of passing personnel or objects.

[0005] To achieve the above object, the present invention provides an intelligent light curtain control system for industrial doors, including:

[0006] A light curtain device, which includes a light beam emission unit and symmetrically arranged light beam receiving units;

[0007] The light beam emission unit includes several light emitters for emitting optical signals, and the light beam receiving unit includes several light receivers for receiving corresponding optical signals. A group of light emitters and light receivers are used to generate a light beam;

[0008] A door body, which is connected to the light curtain device and has a moving trend of moving along a movement path and sequentially blocking several of the light beams, wherein the movement path is parallel to the plane where several light beams are located;

[0009] A driving device, which is arranged on the wall and is in transmission connection with the door body, for driving the door body to move along the movement path;

[0010] A statistical module, which is connected to the light curtain device, for statistically counting in real time the number of the light receivers with interrupted light signal reception and recording it as the number of blocked receivers;

[0011] An analysis module, which is connected to the statistical module, for determining the running state of the door body based on the number of blocked receivers and generating corresponding instructions;

[0012] A control module, which is respectively connected to the analysis module, the driving device and the statistical module, for determining based on the instructions that the statistical module continuously monitors a number of light receivers, determining that the door body stops descending and rises to the initial position, or determining the rising speed of the door body.

[0013] Further, the analysis module is also used for determining whether the door body is in a hovering state based on the change of the number of blocked receivers, and determining whether to start the door body based on the comparison result between the cumulative monitoring duration and the cumulative hovering duration. Or, during the descending process of the door body, the analysis module is also used for re-determining the running state of the door body based on the change of the number of blocked receivers;

[0014] Wherein, the cumulative monitoring duration is the duration from determining that there is no blocked receiver to starting the door body statistically counted by the statistical module.

[0015] Further, the analysis module is also used for determining corresponding processing based on the comparison result between the number of blocked receivers and the critical number of blocked receivers, including: the statistical module continuously monitors a number of the light receivers or determines that the door body stops descending and rises to the initial position.

[0016] Further, the statistical module is also used for statistically counting the longest continuous duration of a number of the blocked receivers in the blocked state;

[0017] The analysis module is also used for determining whether to adjust the rising speed of the door body based on the comparison result between the longest continuous duration and the critical continuous duration.

[0018] Further, the analysis module is also used for determining to increase the rising speed of the door body based on the comparison result between the increased number of blocked receivers and the preset increased number of blocked receivers, and the increased range of the rising speed is in a direct proportion relationship with the increased number of blocked receivers;

[0019] Among them, when determining that the door body rises, the statistical module is used to count the number of blocked receivers before rising and the number of blocked receivers after rising, and the analysis module is used to calculate the difference based on the number of blocked receivers after rising and the number of blocked receivers before rising and record it as the increased number of blocked receivers.

[0020] Further, the analysis module is further used to determine to increase the rising speed of the door body based on the comparison result between the distance difference and the preset distance difference, and the increasing amplitude of the rising speed is inversely proportional to the distance difference.

[0021] Further, the statistical module is further used to count the number of times that the number of blocked receivers is greater than the critical number of blocked receivers within a preset time period and record the number of times as a period index;

[0022] The analysis module is further used to determine the operation parameters of the door body within the next preset time period based on the comparison result between the period index and the preset period index.

[0023] Further, a plurality of the light emitters and a plurality of the light receivers are arranged in a staggered manner with a plane perpendicular to the movement path of the door body as a symmetry plane.

[0024] Further, the light curtain device further includes two symmetrically arranged guide rails and a plurality of beam connectors evenly bolted to the two guide rails. The beam emitting unit is connected to one guide rail through the beam connector, and the beam receiving unit is connected to the other guide rail through the beam connector.

[0025] Further, each of the two guide rails includes a U-shaped guide rail body and a sliding member fixedly arranged on the inner side wall of the U-shaped guide rail body. Both sides of the door body are slidably connected to the two sliding members respectively;

[0026] A plurality of the beam connectors are all bolted to the inner side wall of the U-shaped guide rail body.

[0027] Compared with the prior art, the beneficial effect of an intelligent light curtain control system for an industrial door of the present invention is that the system generates light beams through a plurality of light emitters and corresponding a plurality of light receivers, and a plurality of light beams form a light curtain; when the door body moves along the movement path, it sequentially blocks a plurality of light beams; the statistical module statistically counts the number of light receivers of the blocked light beams in real time; the analysis module determines the operation state of the door body according to the number of blocked receivers in a single monitoring and generates a corresponding instruction; the control module determines that the statistical module continuously monitors a plurality of light receivers based on the instruction to determine that the door body stops descending and rises to the initial position, or determines the rising speed of the door body; thus, the operation state of the door body is controlled according to the instruction, thereby realizing the intelligent control of the door body, improving the real-time control ability of the door body, and thus ensuring the safety of personnel or goods passing through the industrial door.

[0028] Further, the present invention determines whether the door body is in an unstarted state by the change in the number of occlusion receivers, then determines whether to start the downward movement of the door body based on the comparison between the cumulative monitoring duration and the cumulative hovering duration, and simultaneously monitors the occlusion receivers during the downward movement and re-determines the operating state of the door body according to the change in the number. In this way, it can be determined in real time whether there are pedestrians or goods passing through the industrial door, and then timely adjustments can be made to the operation of the door body to ensure the safety of the passing personnel or goods and avoid collisions with the door body, effectively protecting the door body.

[0029] Further, the present invention determines the corresponding processing for the door body according to the comparison result between the number of occlusion receivers and the critical number of occlusion receivers, including: when the number of occlusion receivers is equal to the critical number of occlusion receivers, it is determined that the door body is descending normally, and at this time, the statistical module continuously monitors the optical receivers to determine the change in the number of occlusion receivers; or, when the number of occlusion receivers is greater than the critical number of occlusion receivers, it is determined that there are pedestrians or goods entering or leaving the industrial door, and at this time, the control module determines to raise the door body by controlling the driving device; in this way, intelligent control of the door body can be realized based on the change in the number of occlusion receivers, improving the safety and reliability of the industrial door.

[0030] Further, when determining to raise the door body, the present invention can determine whether to adjust the rising speed based on the comparison between the longest continuous duration of the occlusion receiver in the occlusion state and the critical continuous duration, including: when the longest continuous duration is less than or equal to the critical continuous duration, it can be determined that the door body rises at the initial rising speed; or, when the longest continuous duration is greater than the critical continuous duration, it can be determined to increase the initial rising speed of the door body; in this way, intelligent adjustment of the rising speed of the door body can be realized, effectively avoiding collisions between the door body and pedestrians or goods.

[0031] Further, when determining to increase the initial rising speed of the door body, the present invention can determine the increase amplitude of the rising speed of the door body based on the comparison between the increased number of occlusion receivers and the preset increased number of occlusion receivers, or based on the comparison between the distance difference and the preset distance difference.

[0032] Further, after completing the adjustment of the door body within the preset time period this time, the present invention can determine the operating parameters within the next preset time period based on the comparison between the period index and the preset period index, and then make real-time adjustments to the door body according to the historical data situation, thereby realizing intelligent control of the industrial door.

[0033] Further, the present invention also arranges the optical transmitter and the optical receiver in a staggered and symmetrical form on the front and back surfaces of the door body. In this way, it is ensured that the door body can continuously block the light beam during the movement process, thereby improving the reliability of the control system.

[0034] Furthermore, the present invention also bolts the beam emitting unit and the beam receiving unit to the guide rail through a beam connecting member, which can achieve quick repair and replacement, and improve the operation and maintenance efficiency of the industrial door.

[0035] Furthermore, the present invention also arranges the beam emitting unit and the beam receiving unit inside the guide rail. In this way, not only can the floor space occupied by the industrial door be reduced, but also the beam emitting unit and the beam receiving unit can be protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a top view of the industrial door structure of an intelligent light curtain control system for an industrial door in the present invention;

[0037] Figure 2 It is a schematic structural diagram of the beam emitting unit and the beam receiving unit of an intelligent light curtain control system for an industrial door in the present invention;

[0038] Figure 3 It is a schematic diagram of the modules of an intelligent light curtain control system for an industrial door in the present invention;

[0039] Figure 4 It is a schematic flow diagram of applying an intelligent light curtain control system for an industrial door in the present invention;

[0040] Figure 5 It is a logical decision diagram for determining whether to start the door body based on the cumulative monitoring duration in the present invention;

[0041] Figure 6 It is a logical decision diagram for determining the corresponding processing of the door body or the light receiver based on the number of blocked receivers in the present invention;

[0042] Figure 7 It is a logical decision diagram for determining whether to re-adjust the rising speed of the door body based on the longest continuous duration in the present invention;

[0043] Figure 8 It is a logical decision diagram for determining the operating parameters of the door body in the next preset time period based on the period index in the present invention.

[0044] In the figure:

[0045] 1. Light curtain device; 11. Beam emitting unit; 111. Light emitter; 112. Beam emitting rod; 12. Beam receiving unit; 121. Light receiver; 122. Beam receiving rod; 13. Guide rail; 131. U-shaped guide rail body; 132. Sliding member; 14. Beam connecting member; 2. Door body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] In order to make the objectives and advantages of the present invention more clearly understood, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only for explaining the present invention and are not used to limit the present invention.

[0047] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only for explaining the technical principles of the present invention and do not limit the protection scope of the present invention.

[0048] It should be noted that in the description of the present invention, unless otherwise clearly defined and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0049] Please refer to Figure 1 、 Figure 2 and Figure 3 as shown in Figure 1 which is a top view of the industrial door structure of an intelligent light curtain control system for an industrial door in this embodiment, Figure 2 and which is a schematic structural diagram of the light beam transmitting unit 11 and the light beam receiving unit 12 of an intelligent light curtain control system for an industrial door in this embodiment. Figure 3It is a schematic diagram of the modules of an intelligent light curtain control system for an industrial door in this embodiment. The control system includes a light curtain device 1, a door body 2, a driving device, a statistics module, an analysis module, and a control module. The light curtain device 1 includes a light beam emitting unit 11 and a light beam receiving unit 12 arranged corresponding to the light beam emitting unit 11. The light beam emitting unit 11 includes a plurality of light emitters 111 for emitting optical signals, and the light beam receiving unit 12 includes a plurality of photoreceivers 121 for receiving the corresponding optical signals. A group of light beams is formed by one of the light emitters 111 and a symmetric photoreceiver 121. One light emitter 111 and a symmetric photoreceiver 121 act together to generate a light beam, and a plurality of light beams form a light curtain. The door body 2 is connected to the light curtain device 1 and has a moving tendency to move along the movement path and sequentially block a plurality of the light beams. Among them, the movement path is parallel to the plane where the plurality of light beams are located, and its plane is the plane of the light curtain. The driving device is arranged on the wall and is in transmission connection with the door body 2 to drive the door body 2 to move along the movement path. The statistics module is connected to the light curtain device 1 to continuously count the number of the photoreceivers 121 with interrupted optical signal reception in real time and record it as the number of blocked receivers. In this embodiment, when the door body 2 hovers at the initial position or when no other object passes through the industrial door, a plurality of light beams exist in real time and continuously. When the door body 2 or other object blocks the optical signal emitted by a certain light emitter 111, the optical signal received by the corresponding photoreceiver 121 will be interrupted, that is, the optical signal originally received by the photoreceiver 121 is blocked, and the photoreceiver 121 at this time is recorded as a blocked receiver. The analysis module is connected to the statistics module to determine the operating state of the door body 2 based on the number of blocked receivers and generate an instruction. The control module is respectively connected to the analysis module, the driving device, and the statistics module to determine based on the instruction that the statistics module continuously monitors a plurality of photoreceivers 121, determine that the door body 2 stops descending and rises to the initial position, or determine the rising speed of the door body 2.

[0050] Specifically, in this embodiment, the industrial door is installed as a whole on the wall, and a driving device (not shown in the figure) is arranged on the wall. The driving device connected to the door body 2 includes a driving motor, and the door body 2 is started, stopped and lifted by the driving motor. The door body 2 can be a door panel or a curtain panel (curtain sheet); the light beam sending unit also includes a light beam sending rod 112, and a plurality of light emitters 111 are arranged on the light beam sending rod 112. The light emitter 111 can be a laser, and a light signal is emitted by the laser. The light beam receiving unit 12 also includes a light beam receiving rod 122, and a plurality of light receivers 121 are arranged on the light beam receiving rod 122. The light receiver 121 can be a photoelectric detector, and a light signal is received by the photoelectric detector; the movement path of the door body 2 is parallel to the plane where the light curtain is located, and is also perpendicular to the ground, and the ground here is flat; when a person or object passes through the light curtain, or when the door body 2 descends to block the light curtain , will block the light receiver 121 from receiving the light signal emitted by the light transmitter 111, so that the light beam cannot be formed, and the light receiver 121 at this time is recorded as a blocked receiver. The statistical module counts the number of blocked receivers in a single monitoring cycle, and then the analysis module determines the operation state of the door body 2 and generates corresponding instructions based on the change of the number of blocked receivers counted in a single monitoring cycle. The operation state includes whether the door body 2 is started and descends, or rises, or is in a hovering state. The corresponding instruction refers to the instruction generated after the analysis module determines according to the analysis result, including the re-adjustment of the statistical module or the door body; then the control module determines based on the instruction that after the door body 2 starts to descend, the statistical module continues to monitor a number of light receivers 121, or determines that the door body 2 in the process of descending stops descending and rises to the initial position, or re-determines the rising speed of the door body 2 when the door body 2 is in the rising state. By determining different corresponding instructions according to the change of the number of blocked receivers, and then controlling the operation state of the door body 2 according to the instructions, the intelligent control of the industrial door is realized, and the real-time control capability of the industrial door is improved to ensure the safety of passing personnel or goods. In this embodiment, the plurality of light beams constituting the light curtain are all present in real time and continuously before being blocked.

[0051] See also Figure 4 As shown, it is a schematic diagram of the process of applying an intelligent light curtain control system for industrial doors in this embodiment. The process steps are as follows:

[0052] S1: The light curtain device 1 transmits light signals through a plurality of light transmitters 111 and receives light signals through a corresponding plurality of light receivers 121 to generate a plurality of light beams, and the light curtain is formed by the plurality of light beams;

[0053] S2: driving the door body 2 to move along the motion path and sequentially block a number of light beams through a driving device that is transmission-connected to the door body 2;

[0054] S3: The statistical module connected to the light curtain device 1 statistically counts the number of light receivers 121 with interrupted light signal reception in real time and records it as the number of blocked receivers;

[0055] S4: The analysis module connected to the statistical module determines the operating state of the door body 2 based on the number of blocked receivers and generates corresponding instructions;

[0056] S5: The control module connected to the analysis module, the drive device, and the statistical module determines based on the instructions that the statistical module continuously monitors a number of light receivers 121, determines that the door body 2 stops descending and rises to the initial position, or determines the rising speed of the door body 2.

[0057] Please refer to Figure 5 As shown, it is a logic decision diagram for determining whether to start the door body 2 based on the cumulative monitoring duration in this embodiment. The analysis module is further configured to determine whether the door body 2 is in a hovering state based on the change in the number of blocked receivers, and determine whether to start the door body 2 based on the comparison result of the cumulative monitoring duration and the cumulative hovering duration. Or, during the descent of the door body 2, the analysis module is further configured to re-determine the operating state of the door body 2 based on the change in the number of blocked receivers; wherein, the cumulative monitoring duration is the duration from determining that there is no blocked receiver to starting the door body 2 statistically counted by the statistical module.

[0058] Specifically, in this embodiment, it is set that when the door body 2 starts to descend, it blocks the propagation path of the light signal, and during the descent of the door body 2, the lower side door sequentially blocks the light signal and only one light signal is blocked at the same time. At this time, the number of blocked receivers is 1. The door body 2 includes a door face and a lower side door connected to the lower end of the door face. When the door body 2 continues to descend, the door face in the door body 2 will also block the propagation of more than one light signal, and the lower side door is still blocking the propagation of the remaining light signals, thereby generating more than two blocked receivers.

[0059] Therefore, when the statistical module determines that none of the several light beams are blocked, it can be determined that the door body 2 is still in the hovering and unstarted state. When the door body 2 descends from the initial position, the light signal transmission can be blocked. The statistical module continuously monitors before starting the door body 2 to accumulate the duration during which the light beam is not blocked and records this duration as the cumulative monitoring duration. The cumulative monitoring duration can also be said to be the duration from when the statistical module determines that there is no occlusion of the receiving unit to when the door body 2 is started. The cumulative monitoring duration is obtained by the analysis module. Moreover, a cumulative hovering duration is preset in the analysis module. The cumulative hovering duration is a preset duration and is a duration determination criterion for the control system of the industrial door to determine whether the door body 2 can descend. By comparing the cumulative monitoring duration and the cumulative hovering duration through the analysis module, when the cumulative monitoring duration T is greater than the cumulative hovering duration T0, it can be determined that there are no objects or people passing under the current door body 2. At this time, the analysis module generates a start instruction, and the control module controls the driving device to start the door body 2 according to the instruction; when the cumulative monitoring duration T is less than or equal to the cumulative hovering duration T0, the door body 2 does not start to prevent the door body 2 from descending and colliding when there are objects or people passing through due to too short a monitoring duration. The cumulative hovering duration T0 can be adjusted according to different types and uses of industrial doors. Taking a common industrial door as an example, the cumulative hovering duration T0 can be set to 8 seconds. It should be noted that T0 can also be set to other values that meet the requirements.

[0060] Meanwhile, during the descent of the door body 2, the statistical module continuously monitors the remaining light beam receivers that have not been blocked by the light signal, counts the number K of blocked receivers generated within a single monitoring period, and then the analysis module re-determines the operating state of the lower door body 2 based on the change in the number K of blocked receivers.

[0061] Please refer to Figure 6 As shown, it is a logic decision diagram for corresponding processing of the door body 2 or the optical receiver 121 based on the number of blocked receivers in this embodiment. The analysis module is further configured to determine the corresponding processing based on the comparison result between the number of blocked receivers and the critical number of blocked receivers, including: the statistical module continuously monitors a plurality of the optical receivers 121 or determines that the door body 2 stops descending and rises to the initial position.

[0062] Specifically, in this embodiment, the critical occlusion receiver number K0 refers to the number of optical receivers 121 that receive the occluded optical signal once due to the descent of the door body 2. It can be clearly seen that during the descent of the door body 2, the occlusion receivers appear successively from top to bottom along the light curtain device 1, and only one optical receiver 121 whose optical signal is blocked by the lower edge of the door body 2 each time. Therefore, the critical occlusion receiver number K0 can be set to 1. It can also be clearly seen that the number of occlusion receivers counted at this time does not include the optical receivers 121 whose optical signals are blocked by the door surface of the door body 2, and the statistical object is several remaining optical receivers 121 under the door panel.

[0063] In this embodiment, when it is detected that the number of occlusion receivers changes during a single monitoring period, the statistical module counts the number of occlusion receivers K, and then compares the number of occlusion receivers K with the critical occlusion receiver number K0. The comparison process is as follows:

[0064] If the number of occlusion receivers K is equal to the critical occlusion receiver number K0, it is determined that the light beam is occluded due to the normal descent of the door body 2, and the door body 2 is in the normal closed state. At this time, the statistical module continuously monitors the optical receivers 121 to determine the change in the number of occlusion receivers. In a single monitoring, it is still determined that K is equal to K0, and the monitoring continues.

[0065] If the number of occlusion receivers K is greater than the critical occlusion receiver number K0, it indicates that the number of simultaneously occluded light beams is more than two. At this time, it can be determined that there are other objects or people passing through the light curtain device 1, which causes a large change in the number of occlusion receivers. At this time, the analysis module generates a corresponding instruction, and the control module controls the driving device according to the instruction to stop the descent of the door body 2 and raise the door body 2 to the initial position. It can be clearly seen that K is not infinite at this time.

[0066] Please refer to Figure 7 As shown, it is a logic decision diagram for determining whether to re - adjust the rising speed of the door body 2 based on the longest duration in this embodiment. The statistical module is also used to count the longest duration in the occluded state among several said occlusion receivers; the analysis module is also used to determine whether to adjust the rising speed of the door body 2 based on the comparison result between the longest duration and the critical duration.

[0067] Specifically, in this embodiment, when it is determined that there are more than two blocked receivers within a single monitoring cycle, the longest time during which the optical signals of more than two blocked receivers are blocked is counted and denoted as the longest continuous duration H. The critical continuous duration H0 is set according to different types of industrial doors. The industrial door can be passed by pedestrians or transport devices loaded with goods; here, it can be set that the change in the number of blocked receivers in the light curtain device 1 is caused by pedestrians. With a door width of 3 meters and a normal walking speed of pedestrians of about 1.2 m / s to 1.5 m / s, H0 can be set to 3 seconds. It should be noted that H0 can also be set to other values that meet the requirements. It is clear that even if the longest continuous duration exceeds the critical continuous duration H0, it does not reach the continuous occlusion time threshold for triggering a fault warning. The specific process of comparing the longest continuous duration H1 and the critical continuous duration H0 is as follows:

[0068] If the longest continuous duration H is less than or equal to the critical continuous duration H0, it indicates that the current pedestrian has quickly passed through the industrial door. At this time, the door body 2 moves at the initial rising speed until it reaches the initial position. After the statistical module counts that no blocked optical signals are transmitted by a number of optical receivers 121, a new cumulative monitoring duration T is determined and reset, and then the reset cumulative monitoring duration and the cumulative hovering duration are compared again to determine whether to activate the door body 2. It is clear that H at this time is not infinitesimal.

[0069] If the longest continuous duration H is greater than the critical continuous duration H0, it indicates that there are pedestrians continuously entering and leaving the industrial door. At this time, it is necessary to determine the rising speed of the door body 2 according to the increase in the number of blocked receivers or according to the distance difference D between the lowermost end of the door body 2 and the nearest blocked receiver to the lowermost end of the door body 2. Among them, the control system further includes an acquisition module connected to the analysis module. The acquisition module is used to obtain the distance between the lowermost end of the door body 2 and the ground, and to obtain the distance between the nearest blocked receiver to the lowermost end of the door body 2 and the ground, and then calculate the distance difference D based on these two distances. It should be noted that all the blocked receivers at this time are caused by pedestrians passing through. It is clear that H at this time is not infinite and just needs to meet the actual requirements.

[0070] Furthermore, the analysis module is further used to determine to increase the rising speed of the door body 2 based on the comparison result between the increased number of blocked receivers and the preset increased number of blocked receivers, and the increase amplitude of the rising speed is directly proportional to the increased number of blocked receivers. Among them, the statistical module is used to count the number of blocked receivers before rising and the number of blocked receivers after rising when determining the rising of the door body 2. The analysis module is used to calculate the difference based on the number of blocked receivers after rising and the number of blocked receivers before rising and denote it as the increased number of blocked receivers.

[0071] Specifically, in this embodiment, after it is determined that the door body 2 rises, the statistical module counts the number of occluded receivers before the door body 2 rises, and counts the number of occluded receivers after the door body 2 rises according to a single monitoring cycle. Here, the number of occluded receivers after rising is a variable value, and the number of occluded receivers obtained in each single monitoring cycle is different. For example, two pedestrians of different heights pass through the industrial door one after another, and the shorter pedestrian passes through the industrial door first, and the taller pedestrian passes through the industrial door later. At this time, the number of occluded receivers will increase; it can be clearly seen that when the rising speed of the door body 2 is increased based on the increased number of occluded receivers, the subsequent rising speed will not decrease to ensure the passing safety of subsequent pedestrians. In order to accurately determine the increase amplitude of the rising speed in different situations, the preset increased number of occluded receivers W0 can be divided into the first preset increased number of occluded receivers W1 and the second preset increased number of occluded receivers W2. It is set that W1 = 4 and W2 = 6. It can be clearly seen that the number of several optical transmitters 111 and several optical receivers 121 can meet and conform to the set values in this embodiment. W1 and W2 can also be set to other values; the rising speed of the door body 2 can be intelligently adjusted according to the increased number of occluded receivers, so as to better ensure the passing safety of pedestrians. The specific comparison process of the increased number of occluded receivers W with W1 and W2 is as follows:

[0072] If the increased number of occluded receivers W is less than or equal to the first preset increased number of occluded receivers W1, the analysis module generates an instruction for the first speed increase adjustment coefficient, and the control module increases the initial rising speed of the door body 2 according to this instruction, and increases the initial rising speed by 0.1 m / s.

[0073] If the increased number of occluded receivers W is greater than the first preset increased number of occluded receivers W1 and less than or equal to the second preset increased number of occluded receivers W2, the analysis module generates an instruction for the second speed increase adjustment coefficient, and the control module increases the initial rising speed of the door body 2 according to this instruction, and increases the initial rising speed by 0.2 m / s.

[0074] If the increased number of occluded receivers W is greater than the second preset increased number of occluded receivers W2, the analysis module generates an instruction for the third speed increase adjustment coefficient, and the control module increases the initial rising speed of the door body 2 according to this instruction, and increases the initial rising speed by 0.3 m / s. In this embodiment, it can be clearly seen that the increased rising speed value should be less than the maximum rising speed of the current industrial door corresponding to the type. Therefore, the greater the initial rising speed of the door body 2, the smaller the corresponding speed increase amplitude. It can be clearly seen that W at this time is not infinitely large and conforms to the actual limit.

[0075] Further, the analysis module is further configured to determine to increase the rising speed of the door body 2 based on the comparison result between the distance difference and a preset distance difference, and the increasing amplitude of the rising speed is inversely proportional to the distance difference.

[0076] Specifically, in this embodiment, taking the height of a general industrial door as 4 meters as an example, when a forklift carrying goods passes through the industrial door, the distance difference D can be obtained through the acquisition module. In order to accurately determine the increasing amplitude of the rising speed based on the distance difference D, the preset distance difference D0 can be divided into a first preset distance difference D1 and a second preset distance difference D2. It is set that D1 = 0.3 meters and D2 = 0.5 meters. It should be noted that D1 and D2 can also be set to other values that meet the requirements of the prior art according to parameters such as the height of the industrial door and the height of the forklift carrying the goods. The specific process of comparing the distance difference D with D1 and D2 is as follows:

[0077] If the distance difference D is less than or equal to the first preset distance difference D1, the analysis module generates an instruction for the fourth speed increasing adjustment coefficient, and the control module increases the initial rising speed of the door body 2 according to this instruction, and raises the initial rising speed by 0.4 m / s. At this time, D is not infinitesimal.

[0078] If the distance difference D is greater than the first preset distance difference D1 and less than the second preset distance difference D2, the analysis module generates an instruction for the fifth speed increasing adjustment coefficient, and the control module increases the initial rising speed of the door body 2 according to this instruction, and raises the initial rising speed by 0.3 m / s.

[0079] If the distance difference D is greater than the second preset distance difference D2, the analysis module generates an instruction for the sixth speed increasing adjustment coefficient, and the control module increases the initial rising speed of the door body 2 according to this instruction, and raises the initial rising speed by 0.2 m / s. Similarly, the increased rising speed value should be less than the maximum rising speed value corresponding to the current type of industrial door; and when the initial rising speed of the door body 2 is greater, the corresponding speed increasing amplitude is smaller. At this time, D is not infinite and meets the actual standard.

[0080] Please refer to Figure 8 As shown, it is a logical decision diagram for determining the operating parameters of the door body 2 in the next preset time period based on the period index in this embodiment. The statistical module is further configured to count the number of times that the number of occlusion receivers is greater than the critical number of occlusion receivers within a preset time period and record this number as the period index; the analysis module is further configured to determine the operating parameters of the door body 2 in the next preset time period based on the comparison result between the period index and a preset period index.

[0081] Specifically, in this embodiment, the period index is used to reflect the cumulative total of pedestrian passing behaviors or the passing behaviors of transportation devices loaded with goods within a preset time period; the time period between 7:00 and 8:00 in the morning is set as the preset time period, and the preset period index P0 is set to 25 times. When the statistically obtained period index P is greater than 25 times, it can be determined that the cumulative total of the passing behaviors that occur is relatively large compared to this preset time period. It should be noted that P0 can also be set to other values according to the changes in the preset time period and relevant parameters. The specific process of comparing the period index P with the preset period index P0 is as follows:

[0082] If the period index P is less than or equal to the preset period index P0, it can be determined that the cumulative total of passing within the current preset time period is relatively small. At this time, the initial operating parameters of the door body 2 can be maintained unchanged, that is, it is determined that the initial operating parameters of the door body 2 before the next 7:00 to 8:00 in the morning remain unchanged, that is, the cumulative hovering duration and the descending speed remain unchanged; at the same time, whether to adjust the ascending speed of the door body 2 in the next preset time period also needs to be determined based on the comparison result between the longest continuous duration and the critical continuous duration. It is clear that P at this time is not infinitely small.

[0083] If the period index P is greater than the preset period index P0, it can be determined that the cumulative total of passing within the current preset time period is relatively large. At this time, the operating parameters of the door body 2 in the next preset time period need to be corrected. For example, the cumulative hovering duration can be increased. It is clear that P at this time is not infinitely large and conforms to the actual situation.

[0084] At this time, the analysis module can calculate the difference between the period index P and the preset period index P0 and record this difference as the index difference M. In addition, based on the comparison result between the index difference M and the preset index difference M0, the cumulative hovering duration T0 is determined to be increased. In order to accurately determine the increase amplitude of the cumulative hovering duration through the index difference M, the preset index difference M0 can be divided into a first preset index difference M1 and a second preset index difference M2. It can be set that M1 = 3 times and M2 = 6 times. It should be noted that M1 and M2 can also be set to other values according to the changes in P and P0. The larger the index difference M, the greater the increase amplitude of the cumulative hovering duration. The specific process of comparing the index difference M with M1 and M2 is as follows:

[0085] If the index difference M is less than or equal to the first preset index difference M1, the analysis module generates an instruction for the first duration increase adjustment coefficient, and the control module increases the initial cumulative hovering duration of the door body 2 by 2.5 seconds based on this instruction.

[0086] If the index difference M is greater than the first preset index difference M1 and less than or equal to the second preset index difference M2, the analysis module generates an instruction for the second duration increase adjustment coefficient, and the control module increases the initial cumulative hovering duration of the door body 2 by 3 seconds based on this instruction.

[0087] If the index difference M is greater than the second preset index difference M2, the analysis module generates an instruction for the third duration increase adjustment coefficient, and the control module increases the initial cumulative hovering duration of the door body 2 by 3.5 seconds based on this instruction. It should be clear that the increased value of the initial cumulative hovering duration can also be set to other values, and the cumulative hovering duration of the door body 2 after the increase shall not exceed the maximum duration set for the corresponding industrial door type. At this time, M is not infinitely large and meets the actual requirements.

[0088] Please refer to Figure 1 As shown, a plurality of the light emitters 111 and a plurality of the light receivers 121 are arranged in an interleaved manner with the plane perpendicular to the movement path of the door body 2 as the symmetry plane.

[0089] Specifically, in this embodiment, the interleaved and symmetrically arranged light emitters 111 and light receivers 121 are used to generate a light beam that intersects the plane of the door body 2. When the door body 2 moves along the movement path, the door body 2 can linearly block the light beam, thereby triggering the blanking function of the light curtain. With this setting, even if the door body 2 is affected by wind pressure or its own vibration, it will not occur that the light beam cannot be blocked, resulting in the door body 2 stopping halfway or rising in reverse during closing and being unable to close normally, thus improving the reliability of the control system. The industrial door mentioned in this embodiment includes, but is not limited to, an industrial door using a soft PVC door curtain. Among them, the thickness of the soft PVC door curtain is about 0.4 mm to 5 mm.

[0090] Please refer to Figure 1 As shown, the light curtain device 1 further includes two symmetrically arranged guide rails 13 and a plurality of beam connectors 14 evenly bolted to the two guide rails 13. The beam emitting unit 11 is connected to one guide rail 13 through the beam connector 14, and the beam receiving unit 12 is connected to the other guide rail 13 through the beam connector 14.

[0091] Specifically, in this embodiment, the light curtain device 1 further includes a plurality of beam connectors 14 and two guide rails 13. The two guide rails 13 are symmetrically arranged and are both connected to the wall. The plurality of beam connectors 14 are evenly bolted to a single guide rail 13 according to the quantity. Then, the beam emitting unit 11 is connected to the beam connector 14 on one guide rail 13, so that the beam emitting unit 11 is connected to this guide rail 13. The beam receiving unit 12 is connected to the beam connector 14 on the other guide rail 13, so that the beam receiving unit 12 is connected to this guide rail 13. When a failure occurs in the beam emitting unit 11 or the beam receiving unit 12, the beam emitting unit 11 or the beam receiving unit 12 can be quickly disassembled by removing the beam connector 14, and replaced and repaired, thereby improving the operation and maintenance efficiency of the industrial door.

[0092] Please refer to Figure 1 As shown, both of the two guide rails 13 include a U-shaped guide rail 13 body and a sliding member 132 fixedly arranged on the inner side wall of the U-shaped guide rail 13 body. Both sides of the door body 2 are respectively slidably connected to the two sliding members 132; a plurality of the beam connectors 14 are all bolted to the inner side wall of the U-shaped guide rail 13 body.

[0093] Specifically, in this embodiment, the sliding member 132 has a guide groove, and both sides of the door body 2 can be simultaneously slidably connected to the two sliding members 132 through the guide groove respectively; at this time, the door body 2 is arranged inside the guide rail 13 through the sliding member 132, and moreover, the beam emitting unit 11 and the beam receiving unit 12 are also arranged inside the guide rail 13 through the beam connector 14. With such an arrangement, not only can the floor space of the entire system be reduced, but also the door body 2, the beam emitting unit 11 and the beam receiving unit 12 can be protected from being knocked.

[0094] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or replacements to the relevant technical features, and the technical solutions after these changes or replacements will all fall within the protection scope of the present invention.

[0095] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent light curtain control system for industrial doors, characterized in that, include: A light curtain device, comprising a light beam emitting unit and a symmetrically arranged light beam receiving unit; The light beam emitting unit includes a plurality of light emitters for emitting light signals, and the light beam receiving unit includes a plurality of light receivers for receiving corresponding light signals, and a group of light emitters and light receivers work together to generate a light beam; A door body connected to the light curtain device, having a movement tendency to move along a movement path and sequentially block a plurality of the light beams, wherein the movement path is parallel to a plane where the plurality of light beams are located; A driving device, which is arranged on the wall and is drivingly connected to the door body, and is used to drive the door body to move along the motion path; A statistical module, connected to the light curtain device, for real-time counting the number of the optical receivers whose optical signal reception is interrupted and recording it as the number of blocked receivers; An analysis module connected to the statistical module for determining the operating state of the door body based on the number of the obstruction receivers and generating instructions; The control module is connected to the analysis module, the driving device and the statistical module respectively, and is used to determine that the statistical module continuously monitors a number of light receivers based on the instructions, determine that the door body stops descending and rises to an initial position, or determines the rising speed of the door body.

2. The intelligent light curtain control system for industrial doors according to claim 1, characterized in that, The analysis module is also used to determine whether the door body is in a hovering state based on the change in the number of the shielding receivers, and to determine whether to start the door body based on the comparison result of the cumulative monitoring time and the cumulative hovering time, or, during the descent of the door body, the analysis module is also used to re-determine the operating state of the door body based on the change in the number of the shielding receivers; The accumulated monitoring duration is based on the duration from determining that there is no blocking receiver to starting the door body, which is counted by the statistical module.

3. The intelligent light curtain control system for industrial doors according to claim 2, characterized in that, The analysis module is also used to determine corresponding processing based on the comparison result of the number of blocked receivers and the critical number of blocked receivers, including: the statistical module continuously monitors a number of the light receivers or determines that the door body stops descending and rises to an initial position.

4. The intelligent light curtain control system for industrial doors according to claim 3, characterized in that, The statistical module is also used to count the longest duration of a plurality of the blocked receivers being in a blocked state; The analysis module is also used to determine whether to adjust the rising speed of the door body based on the comparison result of the longest duration and the critical duration.

5. The intelligent light curtain control system for industrial doors according to claim 4, characterized in that, The analysis module is also used to determine that the rising speed of the door body is increased based on the comparison result of the increased number of shielding receivers and the preset increased number of shielding receivers, and the increase in the rising speed is proportional to the increased number of shielding receivers; Among them, the statistical module is used to count the number of obstruction receivers before the rise and the number of obstruction receivers after the rise when determining the rise of the door body, and the analysis module is used to calculate the difference based on the number of obstruction receivers after the rise and the number of obstruction receivers before the rise and record it as the increase in the number of obstruction receivers.

6. The intelligent light curtain control system for industrial doors according to claim 4, characterized in that, The analysis module is also used to determine to increase the rising speed of the door body based on the comparison result of the distance difference and the preset distance difference, and the increase amplitude of the rising speed is inversely proportional to the distance difference.

7. The intelligent light curtain control system for industrial doors according to claim 6, characterized in that, The statistical module is further configured to count the number of times that the number of the occlusion receivers is greater than the critical number of occlusion receivers within a preset time period and record the number of times as a period index; The analysis module is further configured to determine the door body operation parameters within the next preset time period based on the comparison result between the period index and a preset period index.

8. The intelligent light curtain control system for industrial doors according to claim 1, characterized in that, A plurality of the light emitters and a plurality of the light receivers are arranged in a staggered manner with a plane perpendicular to the movement path of the door body as a symmetry plane.

9. The intelligent light curtain control system for industrial doors according to claim 8, characterized in that, The light curtain device further includes two symmetrically arranged guide rails and a plurality of beam connectors evenly bolted to the two guide rails. The beam emitting unit is connected to one guide rail through the beam connector, and the beam receiving unit is connected to the other guide rail through the beam connector.

10. The intelligent light curtain control system for industrial doors according to claim 9, characterized in that, Each of the two guide rails includes a U-shaped guide rail body and a sliding member fixedly arranged on the inner side wall of the U-shaped guide rail body. Two sides of the door body are respectively slidably connected to the two sliding members; A plurality of the beam connectors are all bolted to the inner side wall of the U-shaped guide rail body.

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