Safety protection system and method

Abstract

The invention relates to a safety protection system and method. The safety protection system is applied to the plate cutting machine and used for positioning at least one person in a monitored area, the length and the sawing width of a plate are stored in a plate cutting saw, and the safety protection system comprises a processing unit and a monitoring assembly; the monitored area is provided with a plurality of sections used for bearing plates, channel areas located among the sections, a reference surface and a reference line, the distance between each section and the reference surface is configured as length information, the monitoring assembly is used for measuring the position of at least one person, and the distance between the position of the person and the reference line is configured as width information; and the processing unit judges whether the plate pushing-out condition is met or not based on the channel area matched with the length of the plate. According to the scheme provided by the invention, the system can monitor the personnel condition in the monitored area in real time, and the safety of the production operation of the cut-to-size saw is improved.

Description

Technical Field

[0001] The present application relates to the technical field of panel saws, and in particular to a safety protection system and method. Background Art

[0002] Panel saws can be used for longitudinal and cross-cutting of various man-made boards such as veneer particleboard, fiberboard, plywood, solid wood board, plastic board, aluminum alloy and other materials. They are widely used in panel furniture industry and wood processing industries such as vehicle and ship manufacturing. They are general equipment among woodworking machinery and have a large market demand.

[0003] At present, the panel saws on the market basically adopt the operation mode of manual loading and unloading. Among them, when loading, the operator moves the raw material board to the air flotation table, then walks into the aisle of the air flotation table and pushes the board from the air flotation table into the panel saw for cutting. When unloading, after the panel saw pushes the sawn wood board out of the equipment, the operator walks into the aisle of the air flotation table to take away the finished board. When the board is pushed out from the inside of the machine, the operator's standing position may be in the aisle of the air flotation table and is relatively close to the board push-out port of the panel saw, and he may be hit by the pushed-out board and injured, thereby causing a production safety accident.

[0004] This section merely provides background information related to the present application and is not necessarily prior art. Summary of the invention

[0005] In order to overcome the problems existing in the related technology, the present application provides a safety protection system, which can monitor the personnel situation in the monitored area in real time, flexibly push out or warn according to the size information of the board, and improve the safety of panel saw production operations.

[0006] A first aspect of the present application provides a safety protection system, applied to a panel saw, for locating at least one person in a monitored area, wherein the panel saw stores the length and sawing width of a board, and the safety protection system comprises a processing unit and a monitoring component;

[0007] The monitored area has a plurality of sections for receiving plates, a channel area between the sections, a reference plane and a reference line, the distance between each section and the reference plane is configured as length information, the monitoring component is used to determine the position of at least one person, and the distance between the position of the person and the reference line is configured as width information;

[0008] The processing unit performs a subtraction operation between the length information and the length, obtains the segment of the minimum positive number, and determines the minimum width information of all channel areas in the segment of the minimum positive number;

[0009] If the minimum width information is greater than or equal to the sawing width, the plate is pushed out of the panel saw; if not, a warning reminder is issued by the panel saw.

[0010] In some embodiments, the monitoring assembly includes a through-beam sensor, and each channel area is arranged with a plurality of through-beam sensors arranged side by side outward from the reference line, and the through-beam sensor includes a transmitter and a receiver, the transmitter is arranged on a first side of the channel area, and the optical receiver is arranged on a second side of the channel area;

[0011] The minimum width information is calculated from the receiver of the reference line until the next receiver fails to receive the detection signal of the transmitter.

[0012] In some embodiments, the through-beam sensor is a through-beam photoelectric sensor or an ultrasonic through-beam sensor. In some embodiments, the monitoring component includes a camera device, which is arranged above the monitored area and captures standard image information and operation image information of the monitored area;

[0013] The processing unit synthesizes a scale on the standard image information using the size of the monitored area as a parameter, and performs target object recognition based on the operation image information, and if the operation image information contains a person object, determines a pixel area of ​​the person object in the operation image information;

[0014] The standard image information and the operation image information are matched to obtain the width information of the pixel area and the reference line.

[0015] In some embodiments, the imaging device includes any one of an infrared thermal imager, an industrial camera, a video camera, and a camera head.

[0016] In some embodiments, the monitoring component includes a weighing sensor, and a plurality of weighing sensors are arranged at equal intervals in the longitudinal and transverse directions on the ground of the monitored area;

[0017] The minimum width information is calculated from the weighing sensor of the baseline until the next weighing sensor detects the weight information of the person.

[0018] In some embodiments, it further includes an audible and visual alarm module connected to the processing unit, which is used to receive the broadcast instruction sent by the processing unit and issue an alarm.

[0019] In some embodiments, the processing unit is a PLC controller.

[0020] A second aspect of the present application provides a security protection method, the method comprising:

[0021] Get the sawing parameters of the panel saw;

[0022] Performing status monitoring on the monitored area, wherein the status monitoring is used to monitor the presence status of personnel in the monitored area;

[0023] In combination with the current sawing parameters of the panel saw and the presence status of the personnel, it is determined whether a plate pushing condition is met, wherein the plate pushing condition includes: the distance between the personnel in the monitored area and the reference line and the reference plane is greater than a monitoring threshold;

[0024] If so, the board is pushed out of the panel saw; if not, a warning reminder is issued through the panel saw.

[0025] The technical solution provided by this application may have the following beneficial effects:

[0026] The safety protection system provided in the present application determines whether the plate meets the conditions for being pushed out by monitoring the position of the personnel in the monitored area and combining the current sawing parameters of the plate. When the personnel is in the monitored area and the position in the passage area is less than the monitoring threshold, the personnel is reminded to stay away by a warning, thereby avoiding the problem of being injured by the pushed-out plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0028] Figure 1 is a schematic diagram of the logical structure of the security protection system shown in Example 1 of the present application;

[0029] Figure 2 It is a flow chart of the security protection method shown in the embodiment of the present application. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0031] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0032] This solution is proposed because the panel saw adopts a manual loading and unloading operation mode, and the panel pushing operation of the panel saw cannot be coordinated with the personnel, and the problem of the panel hitting the personnel during unloading is easy to occur. The embodiment of the present application provides a safety protection system that can accurately compare the relationship between the position of the personnel in the monitored area and the size of the panel, realize the safe pushing out of the panel, and improve the enterprise's production safety index.

[0033] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0034] Figure 1 It is a schematic diagram of the logical structure of the security protection system shown in Example 1 of the present application.

[0035] like Figure 1 As shown, the safety protection system is applied to a panel saw for locating at least one person in a monitored area, wherein the panel saw stores the length and sawing width of a board, and the safety protection system includes a processing unit and a monitoring component;

[0036] The monitored area has a plurality of sections for receiving plates, a channel area between the sections, a reference plane and a reference line, the distance between each section and the reference plane is configured as length information, the monitoring component is used to determine the position of at least one person, and the distance between the position of the person and the reference line is configured as width information;

[0037] The processing unit performs a subtraction operation between the length information and the length, obtains the segment of the minimum positive number, and determines the minimum width information of all channel areas in the segment of the minimum positive number;

[0038] If the minimum width information is greater than or equal to the sawing width, the plate is pushed out of the panel saw; if not, a warning reminder is issued by the panel saw.

[0039] In the panel saw production operation, the production personnel enter the size of the original board and the sawing parameters into the control system of the panel saw according to the production requirements (such as the material of the board, the length, width and height of the board, and the sawing width each time). In some embodiments, the sawing parameters of the board can also be identified by a visual system or a radar system. The length of the board remains unchanged when sawing the same board. During sawing, the board is sawed according to the set sawing width along the length direction of the board. In this embodiment, the length of the board can be marked as L1, and the sawing width can be marked as L2, and L2 can be variable or constant.

[0040] Specifically, the monitored area is the sheet material discharge end, which is located at the front side of the panel saw and connected to the sawing area of ​​the panel saw. Each section in the monitored area is a plurality of air-floating operating tables of the panel saw. In the present application, each air-floating operating table is designed to be distributed at intervals, and the intervals between adjacent sections are channel areas, which are used for operators to walk around in the channel area to receive sheets. Since the operation of transferring sheets from the air-floating operating table is repetitive labor, it is difficult for production personnel to accurately reserve a sufficient safety distance every time when standing in the channel area, so as not to be hit by the sheets when pushing out the sheets. The innovation of the present application lies in dynamically monitoring the distance relationship between the production personnel and the currently pushed out sheets, realizing intelligent safety management, and improving the safety of production operations.

[0041] The present application sets corresponding reference planes and reference lines in the channel area, and determines the position data of the person standing in the monitored area through the reference planes and reference lines. The reference plane is the end face of the monitored area that abuts against the plate when the plate is discharged. Specifically, when the panel saw is sawing the plate, the sawing area has a side surface that presses against the plate to ensure the reference effect of the plate and the sawing square effect. The push plate mechanism of the panel saw pushes the sawed plate out of the sawing station, presses against the side surface during the process of pushing the plate, and moves along the extended surface of the side surface when the air flotation operating table moves. With the reference plane as the starting end of the plate in the length direction, each section is distributed at intervals from the starting end, and each section can be marked as H1, H2, H3, H4...Hn from the starting end, where n is a natural number, the interval between H1 and H2 is the P1 channel area, the interval between H2 and H3 is the P2 channel area, the interval between H3 and H4 is the P3 channel area, and so on. The distance between H1 and the reference plane is h1, the distance between H2 and the reference plane is h2, the distance between H3 and the reference plane is h3, and the distance between H4 and the reference plane is h4.

[0042] It can be understood that each section (ie, the air flotation operating table) has two side edges, and the side edge away from the reference plane is the calculation standard of the section.

[0043] It can be understood that the channel area of ​​the current section includes all previous channel areas. For example, the section is H4, and the channel areas it includes are P1, P2 and P3.

[0044] After determining the length of the plate, it can be determined in which section or channel area the end of the plate will be located. The processing unit determines the minimum section required for judgment and comparison based on the distance between each section and the reference plane. That is to say, when the end of the plate is located in the channel area, it is necessary to calculate the two sections adjacent to the channel area. The length information of the section is greater than the length of the plate. The value after subtracting the two is a positive number and the minimum. This can ensure that when a person stands in the channel area, the processing unit can correctly complete the judgment work and reduce unnecessary redundant calculations. Specifically, after the length information of each section is subtracted from the length of the plate, the section with a negative number after subtraction indicates that the length of the section is less than the length of the plate, that is, one end of the plate will exceed the section when the surface plate is pushed out; the section with a positive number after subtraction indicates that the length of the section is greater than the length of the plate, and one of the sections has the smallest positive number after subtraction. Under this setting, it can be determined where the person is in the monitored area before a protection judgment is required.

[0045] The reference line is a straight line where the monitored area intersects the sawing area. When the plate moves along the side surface, the pusher device pushes the plate away from the sawing area and gradually moves from the sawing area to the monitored area. In the channel area, the reference line is the starting end of the plate in the width direction. The monitoring component is used to obtain whether there are personnel in the channel area, and whether the position of the personnel overlaps with the plate to be pushed out. For example, the width information of P1 can be marked as K1, the width information of P2 can be marked as K2, the width information of P3 can be marked as K3, and so on. It can be understood that if there are no personnel in each channel area in the corresponding section, the monitoring component in the channel area is in a state where the maximum width information can be obtained, and the maximum width information indicates that the corresponding section is in an "idle" or "risk-free" state. In this case, the panel saw can operate normally and the plate can be pushed out after the sawing is completed.

[0046] Therefore, the relevant question of this application is not "Where is the person?" but "Which channel area is the person in and how far is it from the baseline?" Therefore, this problem can be solved by the monitoring component in the channel area. When a person stands in the channel area or walks in the channel area, the processing unit will prioritize the section that matches the length of the plate based on the length information of the plate, and then clearly and reliably derive the distance between the operator and the baseline through the monitoring component according to each channel area in the section. This means that when other people enter the channel area of ​​the monitored area that is not related to this launch at the same time, there is no need to judge this.

[0047] Correspondingly, the material joining work of the panel saw is a reciprocating mechanical work, and it is inevitable that there will be problems such as asynchronous material joining, which will cause the boards to pile up in the monitored area. Therefore, in order to improve the safety of personnel in the channel area, when the processing unit obtains the minimum width information of all channel areas in the current section within the length range of the board, it indicates that there is a problem of material accumulation in the monitored area. The processing unit can generate a new baseline based on the minimum width information of all channel areas, and then execute a new judgment logic based on the new baseline to ensure that good protection can still be provided when there is material accumulation.

[0048] In this embodiment, the processing unit is a PLC controller, an industrial computer, a soft PLC or a single-chip microcomputer, and the processing unit is used to perform program action logic control on the woodworking panel saw device, for example, cyclically and continuously executing the following steps:

[0049] 1. Access the control system of the panel saw to obtain the size parameters of the board, including the length of the board and the width of the board each time it is cut.

[0050] 2. Select a section that matches the length of the plate and obtain the minimum width information in all channel areas within the section.

[0051] 3. Based on the sawing width and minimum width information of the board, determine whether to push the board out directly or use the sound and light alarm mold to broadcast a reminder.

[0052] Example 2

[0053] Based on the inventive concept of the present application, the second embodiment of the present application also provides a solution for determining the positional relationship between the comparison personnel and the plate by using multiple through-beam sensors. In the second embodiment, the monitoring assembly includes a through-beam sensor, and each channel area is arranged with a plurality of through-beam sensors arranged side by side from the reference line outward, and the through-beam sensor includes a transmitter and a receiver, the transmitter is arranged on the first side of the channel area, and the optical receiver is arranged on the second side of the channel area;

[0054] The minimum width information is calculated from the receiver of the reference line until the next receiver fails to receive the detection signal of the transmitter.

[0055] Furthermore, the through-beam sensor is a through-beam photoelectric sensor or an ultrasonic through-beam sensor.

[0056] Example 2 of the present application takes a through-beam photoelectric sensor as an example to explain in detail how to realize the width information of the channel area.

[0057] Specifically, those skilled in the art can set different numbers of through-beam photoelectric sensors in the channel area according to actual needs and sensing accuracy. For example, 10 groups of through-beam photoelectric sensors are set in each channel area, and the through-beam photoelectric sensors are equidistantly distributed, and the transmitter and receiver of the through-beam photoelectric sensors are respectively located at the two ends of the channel area, that is, respectively located on both sides of the two sections (air flotation operating table). Starting from the baseline, the distance between each through-beam photoelectric sensor and the baseline gradually increases. When there is no person or object in the channel area to block the detection information signal of the transmitter, the channel area has the maximum width information. When there is a person in the channel area, the processing unit starts to collect information from each through-beam photoelectric sensor one by one starting from the through-beam photoelectric sensor close to the baseline. When it is obtained that there is no signal at the receiving end of the next through-beam photoelectric sensor, the calculation can be terminated and recorded as the minimum width information of the channel area. The minimum width information indicates the distance between the person and the baseline. For example, Figure 1 As shown, the processing unit performs the following operations based on the information of plates L1 and L2. When there is no person in the channel area, the detection information emitted by the transmitting end of each through-beam photoelectric sensor can be normally received by the receiving end. At this time, the channel area has the largest width information, indicating that there is no person in the channel area; when there is at least one person standing in at least one channel area, the processing unit first processes the P1 channel area, and collects the information of each through-beam photoelectric sensor in the P1 channel area one by one. When there is a person standing in P1, the receiving ends of some through-beam photoelectric sensors in the P1 channel area are blocked and cannot normally receive the detection information of the transmitting end. After the processing unit collects the information of the receiving end, it can be recorded as K1 width information, and collects K2 width information of the P2 channel area, judges the size of K1 and K2 to determine the minimum value, and compares the minimum value with L2 to obtain the next step of ejection or warning.

[0058] It can be seen that when the length of L1 is between h2 and h3, there is no need to judge K3, that is, when there are people standing in the P3 channel area, it does not affect the panel saw's work of pushing out the board.

[0059] It should be noted that the width information in the channel area refers to the sawing width of the corresponding plate, not the distance between the two sides of the channel area.

[0060] Example 3

[0061] Based on the inventive concept of the present application, Embodiment 3 of the present application further provides another solution for determining the positional relationship between the comparison personnel and the plate. Specifically, on the basis of Embodiment 1, the monitoring assembly provided in Embodiment 3 of the present application includes a camera device, and the camera device is arranged above the monitored area;

[0062] Acquire standard image information and operation image information of a monitored area, wherein the standard image information overlaps with the operation image information;

[0063] Performing target object recognition based on the job image information, and if the second image information includes a person object, determining the area pixels of the person object in the second image information;

[0064] The standard image information and the operation image information are matched to obtain the distance information between the area pixel and the reference line.

[0065] Furthermore, the above-mentioned camera device includes any one of an infrared thermal imager, an industrial camera, a video camera and a camera head.

[0066] Example 3 of the present application takes an industrial camera as an example to illustrate how to realize the width information of the channel area.

[0067] Specifically, an industrial camera is installed above the monitored area by means of a bracket. After the industrial camera is installed and fixed, the monitored area is calibrated to obtain standard image information. In specific implementation, the standard image information can be a video or a photo. When it is a video, a frame can be intercepted from the video as the standard image information, and the standard image information is image cut by the processing unit to obtain a number of regional images with fixed pixels, and the distance between each regional image and the baseline is determined. After the calibration is completed, the processing unit collects the video data of the industrial camera in real time, and uses the last frame of the video data as the operation image information, compares the pixel difference between the operation image information and the standard image information, and determines the regional pixels of the personnel object. Then, according to the overlapping position of the regional pixels in the standard image information, the distance between the personnel object and the baseline is determined, and the minimum width information is obtained. Correspondingly, in order to ensure the accuracy of the measurement, in a preferred embodiment, the camera device is installed above the baseline close to enable it to perform image acquisition work on the monitored area at a certain tilt angle.

[0068] It is understandable that when the camera device is a thermal infrared imager, the minimum width information when a person stands in the passage area can be determined by judging the temperature partitions of the standard image information and the operation image information of the monitored area.

[0069] It should be noted that, without moving the camera device, the calibration operation only needs to be completed once.

[0070] Example 4

[0071] Based on the inventive concept of the present application, Example 4 of the present application further provides another solution for determining the positional relationship between the comparison personnel and the plate. Specifically, on the basis of Example 1, the monitoring assembly provided in Example 4 of the present application is a plurality of weighing sensors arranged on the bottom surface of the monitored area, and the plurality of weighing sensors are arranged on the ground of the monitored area at equal intervals in the vertical and horizontal directions;

[0072] The minimum width information is calculated from the weighing sensor of the baseline until the next weighing sensor detects the weight information of the person.

[0073] Specifically, the weighing sensors set on the ground are located below each channel area. For example, when the direction of the reference line is horizontal and the direction of the reference plane is vertical, three columns of longitudinal distribution can be set below each channel area, and the distance between the weighing sensors is 5 to 10 cm. When there is no person in the channel area, the weighing sensor is in a no-signal state at this time. The processing unit determines that there is no person in the current monitored area based on the information obtained. At this time, the channel area has the maximum width information, and the processing unit issues a control instruction to the panel saw to push out the board; when there is a person in the channel area, the processing unit obtains the weighing sensor with pressure information, and the processing unit determines the distance between the weighing sensor and the reference line based on the pressure information, and then obtains the minimum width information of the channel area.

[0074] In addition to the above security protection system, the present application also provides a method for applying the security protection system disclosed in the above embodiment, such as Figure 2 As shown, the method includes:

[0075] 201. Obtain sawing parameters of a panel saw;

[0076] 202. Performing status monitoring on the monitored area, wherein the status monitoring is used to monitor the presence status of people in the monitored area;

[0077] 203. Determine whether a plate pushing condition is met based on the current sawing parameters of the panel saw and the presence status of the person, wherein the plate pushing condition includes: the distance between the person in the monitored area and the reference line and the reference plane is greater than a monitoring threshold;

[0078] 204. If yes, push the plate out of the panel saw; if no, send a warning reminder through the panel saw.

[0079] Corresponding to the aforementioned application function implementation method embodiment, the present application also provides an application example of the method applied to the security protection system disclosed in the above embodiment, and the specific implementation process is as follows:

[0080] 1. The operator stands near the air flotation table and feeds the wooden board into the panel saw for sawing.

[0081] 2. The panel saw finishes sawing the wooden board.

[0082] 3. The processing unit compares the length L1 of the board with the widths H1, H2, and H3 on each channel area based on the left edge of the air flotation table to obtain the number of air flotation table channel areas covered by the width of the wooden board.

[0083] For example: If L1 < H1, it means the length of the wooden board is within the range of H1 on the air flotation operation table, indicating that there is no risk of collision for the wooden board. If H1 < L1 < H2, it means that when a person stands in the air flotation table channel area P1, there is a risk of collision. If H2 < L1 < H3, it means that when a person stands in the air flotation table channel areas P1 and P2, there is a risk of collision, and so on.

[0084] 4. When the channel areas covered by the length of the board to be pushed out are calculated, it is determined that if there are operators in these channel areas, there may be a risk of being hit by the pushed-out wooden board. At this time, the processing unit (PLC) collects the feedback signals of three groups of independent monitoring components on the channel area and calculates the distances K1, K2, and K3 of the operators in each channel area from the reference line. Then, the width L2 of the wooden board to be pushed out is compared with the distances from the standing positions of the operators in each channel area to the wooden board push-out opening to determine whether the standing positions of the operators are within the safe range. For example: When H2 < L1 < H3, at this time, it is necessary to compare P1 and P2, that is, the sizes of L2 with K1 and K2 respectively. If either K1 or K2 is less than L2, it means that someone is indeed detected standing in the channel area, indicating that the pushed-out wooden board will hit the operator standing in the channel area.

[0085] 5. When a collision risk is detected, the processing unit uses audible and visual warnings and screen displays to prompt the operator to retreat to a safe range.

[0086] 6. When no collision risk is detected, the processing unit can control the panel saw to push out the board.

[0087] As can be seen from the above implementation description, compared with the prior art, the safety protection system and method provided by this application have the following advantages:

[0088] 1. The safety protection system and method of this application detect the personnel in the monitored area of the panel saw through the monitoring components and the processing unit, and actively issue warning reminders or push out the board to avoid collision accidents, achieving the advantages of maintaining production safety and protecting life and property safety.

[0089] 2. The safety protection system and method of the present application can detect the distance between a person and a baseline by non-contact means, will not hinder the normal work of the person, and has the characteristics of fast response speed.

[0090] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A safety protection system, applied to a panel saw, for locating at least one person in a monitored area, wherein the panel saw stores the length and sawing width of a board, characterized in that: The safety protection system includes a processing unit and a monitoring component; The monitored area has a plurality of sections for receiving plates, a channel area between the sections, a reference plane and a reference line, the distance between each section and the reference plane is configured as length information, the monitoring component is used to determine the position of at least one person, and the distance between the position of the person and the reference line is configured as width information; The processing unit performs a subtraction operation between the length information and the length, obtains the segment of the minimum positive number, and determines the minimum width information of all channel areas in the segment of the minimum positive number; If the minimum width information is greater than or equal to the sawing width, the plate is pushed out of the panel saw; if not, a warning reminder is issued by the panel saw.

2. The safety protection system according to claim 1, characterized in that: The monitoring assembly includes a through-beam sensor, and each channel area is arranged with a plurality of through-beam sensors arranged side by side outward from the reference line, and the through-beam sensor includes a transmitter and a receiver, the transmitter is arranged on a first side of the channel area, and the optical receiver is arranged on a second side of the channel area; The minimum width information is calculated from the receiver of the reference line until the next receiver fails to receive the detection signal of the transmitter.

3. The safety protection system according to claim 2, characterized in that: The through-beam sensor is a through-beam photoelectric sensor or an ultrasonic through-beam sensor.

4. The safety protection system according to claim 1, characterized in that: The monitoring component includes a camera device, which is arranged above the monitored area and captures standard image information and operation image information of the monitored area; The processing unit synthesizes a scale on the standard image information using the size of the monitored area as a parameter, and performs target object recognition based on the operation image information, and if the operation image information contains a person object, determines a pixel area of ​​the person object in the operation image information; The standard image information and the operation image information are matched to obtain the width information of the pixel area and the reference line.

5. The safety protection system according to claim 4, characterized in that: The imaging device includes any one of an infrared thermal imager, an industrial camera, a video camera and a camera head.

6. The safety protection system according to claim 1, characterized in that: The monitoring component includes a weighing sensor, and a plurality of weighing sensors are arranged at equal intervals in the longitudinal and transverse directions on the ground of the monitored area; The minimum width information is calculated from the weighing sensor of the baseline until the next weighing sensor detects the weight information of the person.

7. The safety protection system according to any one of claims 1 to 6, characterized in that: It also includes an audible and visual alarm module connected to the processing unit, which is used to receive the broadcast instruction sent by the processing unit and issue an alarm.

8. The safety protection system according to any one of claims 1 to 6, characterized in that: The processing unit is a PLC controller.

9. A safety protection method, characterized in that: The safety protection method is based on the safety protection system according to any one of claims 1 to 8, and the safety protection method comprises: Get the sawing parameters of the panel saw; Performing status monitoring on the monitored area, wherein the status monitoring is used to monitor the presence status of personnel in the monitored area; In combination with the current sawing parameters of the panel saw and the presence status of the personnel, it is determined whether a plate pushing condition is met, wherein the plate pushing condition includes: the distance between the personnel in the monitored area and the reference line and the reference plane is greater than a monitoring threshold; If so, the board is pushed out of the panel saw; if not, a warning reminder is issued through the panel saw.

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