A smart monitoring device and method for fire doors and fire door sequencers

Abstract

A smart monitoring device and method for fire doors and fire door sequencers, belonging to the field of fire protection technology, includes the following steps: Step 1. Setting a detection cycle and detecting the acceleration value output by the accelerometer installed on the rocker arm in real time cycle by cycle; Step 2. Judging the scenario based on the acceleration value; Step 3. Detecting whether the two door leaves of the fire door are in the closed state; Based on the scenario obtained in Step 2.3 and the closed state of the two door leaves, judging whether the sequencer is working properly. This invention utilizes the existing sequencer to monitor its working status, allowing for timely replacement of malfunctioning sequencers without changing the structure of the existing fire door sequencer, which is beneficial for upgrading, improving, and promoting equipment based on existing fire doors.

Description

Technical Field

[0001] This invention belongs to the field of fire protection technology and relates to the control and monitoring of fire doors, specifically to an intelligent monitoring device and method for fire doors and fire door sequencers. Background Technology

[0002] Fire doors are doors that meet the requirements of fire resistance stability, integrity, and thermal insulation within a certain period of time. They are fire-resistant partitions with a certain degree of fire resistance, installed in fire compartments, evacuation stairwells, vertical shafts, and other similar locations. In buildings, they are specifically used to isolate fire sources and play a crucial role in firefighting. In the event of a fire, people can use fire doors to escape. For double-leaf fire doors, the sealing structure between the two leaves necessitates that they close in a specific order; otherwise, they cannot achieve a proper seal and smoke barrier. Fire door sequencers ensure that normally closed double-leaf fire doors close in the correct sequence, preventing gaps caused by improper closing order, which would prevent the fire door from achieving the designed airtight seal and smoke barrier. Sequencers are specialized fire door accessories that prevent incorrect closing order of normally closed double-leaf fire doors and ensure their proper closure.

[0003] However, in routine fire protection systems, it is usually impossible to monitor the proper functioning of the fire sequencer. When the sequencer malfunctions, it may prevent two fire doors from closing in the correct sequence, or even if they close in the correct sequence, they may not close completely. As a result, in the event of a fire, large amounts of toxic smoke can spread through the unclosed fire doors, posing a significant threat to people's lives. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention discloses an intelligent monitoring device and method for fire doors and fire door sequencers.

[0005] The intelligent monitoring method for fire door sequencers described in this invention is based on a double-leaf fire door, which includes a first door leaf and a second door leaf. The first door leaf closes before the second door leaf, which is the correct closing sequence.

[0006] The monitoring method includes the following steps:

[0007] Step 1. Set the detection cycle and detect the acceleration value output by the accelerometer installed on the rocker arm in real time for each cycle;

[0008] Step 2. Make a scenario judgment based on the acceleration value;

[0009] Define the following three scenarios:

[0010] Scenario 1: The second door opens, the first door closes and generates the first acceleration on the rocker arm;

[0011] Scenario 2: The first door closes, the second door closes and generates a second acceleration on the rocker arm;

[0012] Scenario 3: The first door opens, the second door closes, and the rocker arm experiences a third acceleration.

[0013] For scenario 1, set the acceleration difference threshold, the velocity azimuth angle range, and the displacement azimuth angle range for scenario 1.

[0014] For scenario 2, set the acceleration difference threshold, the velocity azimuth angle range, and the displacement azimuth angle range for scenario 2;

[0015] For scenario 3, set the acceleration difference threshold, the velocity azimuth angle range, and the displacement azimuth angle range for scenario 3;

[0016] Among them, there is no overlap between the velocity azimuth angle intervals and the displacement azimuth angle intervals under different scenarios; the acceleration difference threshold for scenario 1 is greater than the acceleration difference threshold for scenario 2, and the acceleration difference threshold for scenario 2 is greater than the acceleration difference threshold for scenario 3.

[0017] Step 2.1. Calculate the difference between the acceleration values ​​collected by the accelerometer in the current detection cycle and the previous detection cycle, and use this difference as the acceleration difference value for the current detection cycle. If the acceleration difference value is greater than the preset motion threshold, the rocker arm is considered to be in motion and the subsequent steps are entered. Otherwise, the subsequent steps are not performed and Step 2.1 is continued.

[0018] The time interval between the point when the acceleration difference is greater than the motion threshold and the point when it is less than the motion threshold is set as the detection interval.

[0019] Step 2.2. Within the detection range, calculate the velocity azimuth and displacement azimuth based on the acceleration detected by the accelerometer in the current detection cycle; and statistically analyze the acceleration difference for each cycle.

[0020] Determine whether the acceleration difference, velocity azimuth angle, and displacement azimuth angle belong to the acceleration difference threshold range, velocity azimuth angle range, and displacement azimuth angle range under the three scenarios.

[0021] Step 2.3

[0022] Define the following three conditions:

[0023] Condition 1. Within the detection interval, the N points with the largest acceleration difference are greater than the acceleration difference threshold for this scenario, where N is the set quantity threshold;

[0024] Condition 2. Within the detection interval, the velocity azimuth angle belongs to the velocity azimuth angle interval of this scenario;

[0025] Condition 3. Within the detection interval, the displacement azimuth angle belongs to the displacement azimuth angle interval of this scenario;

[0026] If two or more of the three conditions in the test result meet the same scenario, then the test interval is considered to belong to that scenario.

[0027] Otherwise, return to step 2 to continue the test;

[0028] Step 3. Check whether both doors of the fire door are closed; based on the scenario obtained in Step 2.3 and the closed status of the two doors, determine whether the sequencer is working properly;

[0029] If scenario 1 is met, the sequencer is considered to be working properly when the first door is closed; otherwise, it is considered to be malfunctioning.

[0030] If scenario 2 is met, the sequencer is considered to be working properly when the second door is closed; otherwise, it is considered to be malfunctioning.

[0031] If scenario 3 is met, the sequencer is considered to be working properly when both the first and second doors are open; otherwise, it is considered to be malfunctioning.

[0032] Preferably, the specific method for calculating the velocity azimuth angle and displacement azimuth angle based on the acceleration detected by the accelerometer during the current detection period in step 2.2 is as follows:

[0033] The detected acceleration values ​​a in the x and y directions x ,a y The velocity values ​​V of the rocker arm in the x-axis and y-axis directions are obtained by performing first and second integrations respectively. x V y and displacement value L x L y Since the collected acceleration values ​​are discrete, if the acceleration of the object over a period of time is a... x [t] and a y Given [t], where the sampling interval is dt, the formula for calculating the velocity value at sampling point N is:

[0034] V x [t] = V y [t] = ,

[0035] The formula for calculating the displacement value at sampling point N at time N is:

[0036] L x [t] = ,L y [t] = ,

[0037] Calculate the velocity azimuth and displacement azimuth using the arctangent function.

[0038] θ V = arctan(V y / V x ), θ L = arctan(L y / L x ).

[0039] The present invention also discloses an intelligent monitoring device for a fire door sequencer, including an acceleration sensor mounted on the rocker arm of the sequencer, the acceleration sensor having a two-dimensional acceleration detection function, a door leaf detection device for detecting the opening and closing status of two door leaves of the fire door, and a microcontroller connected to the acceleration sensor and the door leaf detection device, the microcontroller also being connected to a signal transmission device, the microcontroller being able to execute the monitoring method.

[0040] Preferably, the door detection device consists of two mechanical push switches, each including a first soft-cap button and a second soft-cap button, located at positions that can be triggered by pressure when the first and second doors of the fire door are closed.

[0041] Preferably, the mechanical push switch has a position adjustment device, which can adjust the position of the soft cap button so that the soft cap button is pressed and triggered when the door is closed.

[0042] Preferably, the acceleration sensor is mounted on the rocker arm of the sequencer at one end where a roller is mounted.

[0043] Preferably, the signal transmission device includes a wireless communication module and an antenna connected to the wireless communication module.

[0044] Preferably, the door detection device includes a magnetic patch installed on the top of the door leaf and a Hall proximity switch located below the top of the door frame. The installation positions of the Hall proximity switch and the magnetic patch cooperate to sense each other when the door leaf is closed.

[0045] The present invention also discloses a fire door, including a fire door sequencer, and a fire door sequencer intelligent monitoring device as described above, which is installed on the fire door and connected to the fire door sequencer.

[0046] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0047] 1. By utilizing the existing sequencer and adding a monitoring device directly to it through welding or other methods, the added component can be designed to be compatible with the existing sequencer, or it can be integrated with the existing sequencer. The monitoring device is installed and connected as a relatively independent sequencer accessory, without changing the structure of the existing fire door sequencer. This is conducive to upgrading, improving and promoting the equipment based on existing fire doors.

[0048] 2. By using an accelerometer to obtain the acceleration of the sequencer arm, the closing action of the door leaf can be effectively determined. Combined with the information on whether the door leaf is closed, it can be determined whether the sequencer is working properly, so as to replace the abnormal sequencer in time and ensure the normal operation of the fire door sequencer.

[0049] 3. By using a door detection device, it is possible to accurately determine whether two doors can be closed normally, thus ensuring the smoke prevention effect.

[0050] 4. Real-time online monitoring of the sequencer status can be ensured through wireless transmission equipment, ensuring that abnormalities in the sequencer can be detected and replaced in a timely manner. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of a specific embodiment of the fire door described in this invention;

[0052] Figure 2 This is a schematic diagram of a specific embodiment of the monitoring box described in this invention;

[0053] Figure 3 This is a schematic diagram of a specific embodiment of the mechanical push switch described in this invention;

[0054] Figure 4 This is a schematic diagram of a specific embodiment of the monitoring device system framework structure described in this invention;

[0055] Figure 5 This is a schematic flowchart of a specific implementation of the monitoring method described in this invention;

[0056] Figure 6 This is a schematic diagram of the acceleration difference curve for scenario 1 in a specific embodiment;

[0057] Figure 7 This is a schematic diagram of the acceleration difference curve for scenario 2 in a specific embodiment;

[0058] Figure 8 This is a schematic diagram of the acceleration difference curve for scenario 3 in a specific embodiment;

[0059] Figure 9 This is a schematic diagram of the rocker arm velocity azimuth curve for scenario 1 in a specific embodiment.

[0060] Figure 10 This is a schematic diagram of the rocker arm velocity azimuth curve in scenario 2 of a specific embodiment;

[0061] Figure 11 This is a schematic diagram of the rocker arm velocity azimuth curve in scenario 3 of a specific embodiment;

[0062] Figure 12 This is a schematic diagram of the rocker arm displacement azimuth curve for scenario 1 in a specific embodiment.

[0063] Figure 13 This is a schematic diagram of the rocker arm displacement azimuth curve in scenario 2 of a specific embodiment.

[0064] Figure 14 This is a schematic diagram of the rocker arm displacement azimuth curve in scenario 3 of a specific embodiment;

[0065] The attached figures are labeled as follows:

[0066] 1. First door leaf; 2. Second door leaf; 3. Door frame; 4. Sequencer; 5. Monitoring box; 6. Intelligent monitoring device; 7. Housing; 8. Rocker arm; 9. Roller; 10. Screw; 11. Wiring connector; 12. Three-dimensional accelerometer; 13. Sliding connection hole; 14. Mechanical push switch; 15. First soft-cap button; 16. Second soft-cap button; 17. Microcontroller; 18. Dry cell battery; 19. Wireless communication module; 20. Antenna. Detailed Implementation

[0067] The specific embodiments of the present invention will be described in further detail below.

[0068] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0069] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present invention discloses a fire door sequencer intelligent monitoring device, including a first door leaf 1, a second door leaf 2, a door frame 3, a sequencer 4, a monitoring box 5, and an intelligent monitoring device 6.

[0070] In actual use, the first door leaf 1 and the second door leaf 2 have a closing sequence. The first door leaf 1 must be closed first, and the second door leaf 2 must be closed later in order to make the two doors completely closed and achieve fireproof sealing and isolation.

[0071] The first door leaf 1 and the second door leaf 2 are hinged to the door frame 3. The sequencer 4 includes a housing 7, a rocker arm 8, and a roller 9, which enables the first door leaf 1 and the second door leaf 2 to close sequentially. The housing 7 is fixedly connected to the top of the door frame 3 by screws. One end of the rocker arm 8 is connected to the housing 7, and the other end is connected to the roller 9, which is used to make direct contact with the first door leaf 1 and the second door leaf 2. The roller 9 is located on the outermost side of the rocker arm and has a buffering effect when the second door leaf 2 closes. When the first door leaf 1 is closed, the second door leaf 2 can slide smoothly to close.

[0072] In one specific embodiment, the monitoring box 5 includes a connector 11 and a sliding connection hole 13 for mounting a mechanical push-button switch 14 (serving as a door detection device), a microcontroller 17, a dry cell battery 18, a wireless communication module 19, and an antenna 20. The intelligent monitoring device 6 includes a three-dimensional accelerometer 12, the mechanical push-button switch 14, and the microcontroller 17 for monitoring whether the sequencer 4 is functioning correctly. The mechanical push-button switch 14 includes a first soft-cap button 15 and a second soft-cap button 16 for monitoring whether the corresponding door is closed. The dry cell battery 18 provides power to the intelligent monitoring device 6 and the wireless communication module 19. The antenna 20 is connected to the wireless communication module 19 for transmitting wireless signals.

[0073] The sliding connection hole 13 on the top of the monitoring box 5 is connected to the housing 7 by screws 10 to facilitate installation.

[0074] The mechanical push-button switch has a position adjustment device, which can adjust the position of the soft cap button so that the soft cap button is pressed and triggered when the door is closed.

[0075] The position adjustment device can be a slide rail installed inside the monitoring box. A mechanical push switch is installed on the slide rail, and the movement direction of the slide rail is perpendicular to the plane where the door is closed. By adjusting the position of the mechanical push switch on the slide rail, the soft cap button end of the mechanical push switch is located in the plane where the door is closed. When the door is closed, the soft cap button is pressed and triggered, thereby adapting to different door frame and door thicknesses.

[0076] The distance between the monitoring box 5 and the first door leaf 1 and the second door leaf 2 can also be adjusted and fixed using the sliding connection hole 13, so as to ensure that when the monitoring box 5 is installed on door frames 3 of different widths, the first soft cap button 15 and the second soft cap button 16 can be pressed after the first door leaf 1 and the second door leaf 2 are closed.

[0077] The line from the three-dimensional acceleration sensor 12 is connected to the microcontroller 17 inside the monitoring box 5 via the connector 11 on the side of the monitoring box 5 near the roller 9.

[0078] The first soft cap button 15 on the right and the second soft cap button 16 on the left of the mechanical push switch 14 are touched and pressed when the first door leaf 1 and the second door leaf 2 are closed, respectively, thereby determining whether a specific door leaf is closed.

[0079] The three-dimensional acceleration sensor 12 can be fixed to the rocker arm 8 near the roller 9 to obtain the acceleration information of the rocker arm 8. In this invention, the three acceleration directions of the rocker arm 8 are mainly obtained: the first acceleration A1 is the acceleration generated by the rocker arm 8 along the closing direction of the first door 1 when the second door 2 is opened and the first door 1 is closed; the second acceleration A2 is the acceleration generated by the rocker arm 8 along the closing direction of the second door 2 when the first door 1 is closed and the second door 2 is closed; the third acceleration A3 is the acceleration generated by the rocker arm 8 along the closing direction of the second door 2 when the second door 2 is closed and the first door 1 is opened and the second door 2 is closed. The third acceleration A3 is the acceleration generated by the rocker arm 8 along the closing direction of the second door 2 when the second door 2 is closed and the first door 1 is both opened and the second door 2 is closed first. However, due to the normal function of the sequencer 4, the rocker arm 8 will resist the second door 2 and will not slide until the first door 1 is closed, which pushes the rocker arm 8 to close the two doors together.

[0080] The microcontroller 17 can be an STM32 series chip, and the wireless communication module 19 can be a ZigBee wireless communication protocol. The STM32 microcontroller is connected to the ZigBee terminal, so that the information processed by the STM32 microcontroller can be wirelessly sent to the ZigBee router through the ZigBee terminal device, thereby achieving the effect of wireless transmission of the sequencer 4 monitoring information.

[0081] Door detection devices can also use Hall effect proximity switches. Magnetic patches are installed on the top of the two door panels. When the door panels are closed, the magnetic patches approach the Hall effect proximity switch, generating a Hall effect that triggers a change in the internal circuit state, thereby determining whether the corresponding door panel is closed. Mechanical push switches or Hall effect proximity switches can be installed inside the monitoring box, symmetrically placed with the gap formed by the two door panels when closed as the central axis.

[0082] The three-dimensional accelerometer 12 is fixed on the rocker arm 8, usually installed at the end of the rocker arm 8 where the roller is installed. In this invention, the acceleration, velocity and displacement mentioned throughout the text refer to the acceleration, velocity and displacement at the mounting point of the accelerometer.

[0083] The mechanical push-button switch 14, microcontroller 17, dry cell battery 18 and wireless communication module 19 are placed inside the monitoring box 5, and the monitoring box 5 is fixed to the bottom of the sequencer housing 7.

[0084] Based on the above implementation plan, the monitoring method and steps are as follows:

[0085] Step 1. The mechanical push switch 14 and the three-dimensional accelerometer 12 collect information cycle by cycle and transmit the information back to the microcontroller 17;

[0086] Step 2. The microcontroller 17 processes the collected information:

[0087] Define the following three scenarios:

[0088] Scenario 1: The second door 2 opens, the first door 1 closes, and the rocker arm experiences a first acceleration A1.

[0089] Scenario 2: The first door 1 is closed, and the second door 2 closes, generating a second acceleration A2 on the rocker arm;

[0090] Scenario 3: The first door opens, the second door 2 closes and generates a third acceleration A3 on the rocker arm;

[0091] For fire doors and sequencers that are functioning normally, there will not be a situation where the second door is closed but the first door is open;

[0092] Step 2.1 Subtract the acceleration values ​​collected by the three-dimensional accelerometer 12 from those collected in two adjacent cycles to obtain the acceleration difference value. The three-dimensional accelerometer 12 collects the magnitude and direction of the rocker arm 8's acceleration in real time, cycle by cycle. When the difference in acceleration values ​​between two consecutive cycles is greater than 0.1 m / s², the acceleration difference is calculated. 2 At that time, it is assumed that the rocker arm is in motion;

[0093] In the current detection cycle, the difference between the acceleration values ​​detected in the current detection cycle and the previous detection cycle is taken as the acceleration difference value for the current detection cycle.

[0094] When a fire door is normally closed, the absolute value of the acceleration difference changes drastically, and the angle changes simultaneously. Setting a suitable acceleration difference threshold, such as 0.1 m / s², is recommended. 2 It can accurately detect whether the rocker arm is moving.

[0095] Step 2.2 Fits curves showing the changes in acceleration direction, velocity azimuth angle, and displacement azimuth angle to classify acceleration directions. The processing of acceleration information collected by the three-dimensional accelerometer 12 is performed in the following steps:

[0096] The acceleration collected by the three-dimensional accelerometer 12 is the vector sum of the x-axis and y-axis accelerations directly collected. The x-axis and y-axis directions are set by the sensor itself, typically the direction of the closed line at the top of the fire door and the direction perpendicular to the closed line.

[0097] like Figure 6 , Figure 7 and Figure 8 The figures shown are the difference distribution diagrams of the acceleration output by the three-dimensional accelerometer 12 of a certain type of fire door in two consecutive adjacent cycles under the above three scenarios. It can be seen that in scenario 1, when the second door leaf 2 is open and the first door leaf 1 is closing, the acceleration difference is within the threshold range of 2 m / s². 2 The above section contains 10 or more data distributions. Scenario 2, where the acceleration difference between the second door (door 2) and the first door (door 1) is closed, is within the threshold range of 1 m / s². 2 —1.5m / s 2 There are 10 or more data distributions between them and the threshold range of 2m / s 2 The above section lacks data distribution. Scenario 3, where the acceleration difference between the first door (1) and the second door (2) closing is within the threshold range of 1 m / s². 2 The above data distribution is not available, and the three types of acceleration have strict and non-overlapping threshold distinction conditions.

[0098] The acceleration values ​​a along the x and y axes of the three-dimensional accelerometer 12 x ,a y The velocity values ​​V along the x and y axes during the rotation of rocker arm 8 are obtained by performing first and second integrations respectively. x V y and displacement value L x L y Since the collected acceleration values ​​are discrete, if the acceleration of the object over a period of time is a... x [t] and a y Given [t], where the sampling interval is dt, the formula for calculating the velocity value at sampling point N is:

[0099] V x [t] = V y [t] = ,

[0100] The formula for calculating the displacement value at sampling point N at time N is:

[0101] L x [t] = ,L y [t] = ,

[0102] The velocity azimuth and displacement azimuth are calculated using the arctangent function.

[0103] θ V = arctan(V y / V x ), θ L = arctan(L y / L x The velocity and azimuth angle θ of the rocker arm 8 during rotation are obtained when the first door leaf 1 and the second door leaf 2 are impacted under different conditions. V and displacement azimuth angle θ L .

[0104] In Scenario 1, both door panels 1 and 2 are open, the rocker arm has the largest angle with the door frame, the first door panel closes freely with the longest travel, and the acceleration variation range is the largest. Furthermore, the rocker arm's position after the first door panel closes in Scenario 1 has the largest angle compared to its initial position, meaning the rocker arm's position change angle is the largest in Scenario 1. Since the velocity azimuth angle refers to the direction of the instantaneous angular velocity of the rod during rotation, and the direction of angular velocity is consistent with the direction of rotation angle, a larger rotation angle results in a larger velocity azimuth angle. The displacement azimuth angle refers to the cumulative angular change of the rod during rotation; an increase in rotation angle indicates an increase in the total angle experienced by the rod during rotation, thus the displacement azimuth angle also increases accordingly. Therefore, in Scenario 1, the maximum range of acceleration difference detected by the accelerometer is the largest, and both the displacement azimuth angle and the velocity azimuth angle are also the largest.

[0105] In scenario 3, the first door is open and the second door 2 is closing. This closing is actually an incorrect closing state of the fire door. The rocker arm resists the second door from closing. The rocker arm itself does not swing significantly. The resulting motion is due to the disordered vibration caused by the impact of the second door. As a result, in scenario 3, the maximum value of the acceleration difference detected by the acceleration sensor is in the smallest range, and the displacement azimuth angle and velocity azimuth angle are also the smallest.

[0106] In scenario 2, the first door 1 is closed, and the second door 2 is closing. The range of change of the rocker arm is smaller than that in scenario 1. The acceleration difference, displacement azimuth angle and velocity azimuth angle are between those of scenario 1 and scenario 3.

[0107] The velocity azimuth angle was measured, and the measurement results are as follows: Figure 9 , Figure 10 and Figure 11 As shown, the velocity azimuth angles θ for scenarios 1, 2, and 3 are respectively. VAs shown in the change diagram, in scenario 1 (when the second door 2 is open and the first door 1 is closing), the velocity azimuth angle of the rocker arm 8 changes from 20° to 25°. In scenario 2 (when the first door 1 is closed and the second door 2 is closing), the velocity azimuth angle of the rocker arm 8 changes from 10° to 15°. In scenario 3 (when the first door 1 is open and the second door 2 is closing), the velocity azimuth angle of the rocker arm 8 changes from 3° to 8°. Thus, it can be seen that the rocker arm 8 has a fixed and non-overlapping velocity azimuth angle change range in these three scenarios.

[0108] The displacement azimuth angle was measured, and the measurement results are as follows: Figure 12 , Figure 13 and Figure 14 The figures show the displacement azimuth angles θ for scenarios 1, 2, and 3, respectively. L As shown in the change diagram, in scenario 1 (when the second door 2 is open) during the closing of the first door 1, the displacement azimuth angle of the rocker arm 8 changes from 15° to 20°. In scenario 2 (when the first door 1 is closed) during the closing of the second door 2, the displacement azimuth angle of the rocker arm 8 changes from 7° to 12°. In scenario 3 (when the first door 1 is open) during the closing of the second door 2, the displacement azimuth angle of the rocker arm 8 changes from 0° to 5°. The rocker arm 8 has a fixed and non-overlapping displacement azimuth angle change range in these three scenarios.

[0109] Since the azimuth angle is obtained based on the ratio of the velocities along the X and Y axes, the absolute value of the angle will change for different X and Y axis settings, but the angle ranges will not overlap under different scenarios.

[0110] In scenario 1, where the first door 1 is closing while the second door 2 is open, the rocker arm 8 rotates at the largest angle among the three acceleration scenarios. Furthermore, the force exerted by the first door 1 on the rocker arm 8 lasts longer, resulting in the largest number of acceleration difference signal points and the greatest changes in velocity and displacement azimuth angles. In scenario 2, where the second door 2 is closing while the first door 1 is closed, the rocker arm 8 rotates at a smaller angle than in scenario 1. The force exerted by the second door 2 on the rocker arm 8 lasts shorter than in scenario 1, resulting in fewer acceleration difference signal points and smaller changes in velocity and displacement azimuth angles. In scenario 3, where the second door 2 is closing while the first door 1 is open, the rocker arm 8 does not rotate. The force exerted by the second door 2 on the rocker arm 8 lasts the shortest of the three acceleration scenarios, resulting in the fewest acceleration difference signal points and the smallest, almost zero, changes in velocity and displacement azimuth angles.

[0111] A stainless steel sequencer with a rocker arm 8 (275mm long, 90mm long, and 30mm wide) was selected. An experiment was conducted in an environment with a fire door 220cm high, a door frame 148cm wide, and a single door width of 75cm. In scenario 1 (where the second door 2 is open and the first door 1 is closing), the difference in the sum of the acceleration vectors obtained was within the threshold range of 2m / s². 2 The above section contains 13 data distributions, with a velocity azimuth angle change of 24° and a displacement azimuth angle change of 19°. In scenario 2, where the first door 1 is closed and the second door 2 is closing, the difference between the sum of the obtained acceleration vectors is within the threshold range of 1 m / s². 2 —1.5m / s 2 There are 17 data distributions between them, at 2m / s 2 The above portion has no data distribution; the velocity azimuth angle change is 15°, and the displacement azimuth angle change is 9°. In scenario 3, where the first door 1 is open and the second door 2 is closing, the difference between the sum of the obtained acceleration vectors is within the threshold range of 1 m / s². 2 The above data distribution is not specified. The velocity azimuth angle variation is 6°, and the displacement azimuth angle variation is 3°. It can be seen that the difference between the acceleration vector sums of the three types of accelerations, the velocity azimuth angle variation, and the displacement azimuth angle variation are all within strictly non-overlapping intervals.

[0112] Step 2.3

[0113] Define the following three conditions:

[0114] Condition 1. Within the detection interval, the N points with the largest acceleration difference are greater than the acceleration difference threshold for this scenario, where N is the set quantity threshold;

[0115] Condition 2. Within the detection interval, the velocity azimuth angle belongs to the velocity azimuth angle interval of this scenario;

[0116] Condition 3. Within the detection interval, the displacement azimuth angle belongs to the displacement azimuth angle interval of this scenario;

[0117] If two or more of the three conditions in the test result meet the same scenario, then the test interval is considered to belong to that scenario.

[0118] Based on the distribution characteristics of the data points within the threshold interval of the acceleration difference between the x-axis and y-axis obtained above, and the velocity azimuth angle θ generated when the rocker arm 8 rotates... V The change in angle difference and the displacement azimuth angle θ generated when the rocker arm 8 rotates L The data from the angle of change, the difference, and the other three factors are used to make a comprehensive judgment: if the difference between the sum of the acceleration vectors of the x and y axes is within the threshold range of 2 m / s², then... 2If the above-mentioned data distribution has 10 or more data points, and the velocity azimuth angle of rocker arm 8 varies within the range of 20°–25°, or the displacement azimuth angle of rocker arm 8 varies within the range of 15°–20°, then the acceleration is determined to be the first acceleration A1, which meets scenario 1; if the collected acceleration value satisfies the condition that the difference between the sum of the x and y axis acceleration vectors is within the threshold range of 1 m / s², then the acceleration is determined to be the first acceleration A1, which meets scenario 1. 2 —1.5m / s 2 There are 10 or more data distributions between them and the threshold range of 2m / s 2 If any two of the above conditions are met—namely, the absence of data distribution for the portion above, the velocity azimuth angle variation range of rocker arm 8 being 10°–15°, and the displacement azimuth angle variation range of rocker arm 8 being 7°–12°—then the acceleration is identified as the second acceleration A2, which conforms to scenario 2. If the collected acceleration value satisfies the condition that the difference between the sum of the x and y axis acceleration vectors is within the threshold range of 1 m / s², then the acceleration is identified as the second acceleration A2, which conforms to scenario 2. 2 If there are no data distributions above, and the velocity azimuth angle of rocker arm 8 varies from 3° to 8°, or the displacement azimuth angle of rocker arm 8 varies from 0° to 5°, then the acceleration is determined to be the third acceleration A3, which meets scenario 3. In this way, we can determine which scenario each acceleration produced by rocker arm 8 under different impact conditions of the double doors meets.

[0119] Step 3. Then, determine the working status of the sequencer based on whether the door is closed.

[0120] When both the first door leaf 1 and the second door leaf 2 are open, and the acceleration collected by the three-dimensional acceleration sensor 12 is determined to be the first acceleration A1, if the first soft cap button 15 corresponding to the first door leaf 1 is pressed, it means that the first door leaf 1 is closed in the normal sequence and the sequencer 4 is functioning normally. If the first soft cap button 15 corresponding to the first door leaf 1 is not pressed, it means that the first door leaf 1 is not closed normally and the sequencer 4 is malfunctioning.

[0121] When the first door 1 is closed, and the acceleration collected by the three-dimensional acceleration sensor 12 is determined to be the second acceleration A2, if the second soft cap button 16 corresponding to the second door 2 is pressed, it means that the second door 2 is closed in the normal sequence and the sequencer 4 is functioning normally. If the second soft cap button 16 corresponding to the second door 2 is not pressed, it means that the second door 2 is not closed normally and the sequencer 4 is malfunctioning.

[0122] When both the first door leaf 1 and the second door leaf 2 are open, and the acceleration collected by the three-dimensional acceleration sensor 12 is determined to be the third acceleration A3, if neither the first soft cap button 15 nor the second soft cap button 16 is pressed, it means that the second door leaf 2 is blocked by the sequencer 4 because it did not close in the normal order. At this time, the sequencer 4 is functioning normally. If the second soft cap button 16 corresponding to the second door leaf 2 is pressed, it means that the second door leaf 2 did not close in the normal order. At this time, the sequencer 4 is malfunctioning.

[0123] The wireless communication module 19 sends the opening or closing status information of the first door leaf 1 and the second door leaf 2, as well as the information on whether the sequencer 4 is operating normally, collected by the intelligent monitoring device 6, to the communication relay device.

[0124] Embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0125] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0126] The foregoing descriptions are preferred embodiments of the present invention. Unless there is a clear contradiction between the preferred embodiments or a prerequisite for a particular preferred embodiment, the preferred embodiments can be arbitrarily combined and used. The embodiments and specific parameters described are only for clearly illustrating the inventor's invention verification process and are not intended to limit the scope of patent protection of the present invention. The scope of patent protection of the present invention shall still be determined by its claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A method for intelligent monitoring of fire door sequencers, based on a double-leaf fire door, wherein the double-leaf fire door includes a first door leaf and a second door leaf, and the first door leaf closes before the second door leaf, which is the correct closing sequence; Its features The monitoring method includes the following steps: Step 1. Set the detection cycle and detect the acceleration value output by the accelerometer installed on the rocker arm in real time for each cycle; Step 2. Make a scenario judgment based on the acceleration value; Define the following three scenarios: Scenario 1: The second door opens, the first door closes and generates the first acceleration on the rocker arm; Scenario 2: The first door closes, the second door closes and generates a second acceleration on the rocker arm; Scenario 3: The first door opens, the second door closes, and the rocker arm experiences a third acceleration. For scenario 1, set the acceleration difference threshold, the velocity azimuth angle range, and the displacement azimuth angle range for scenario 1. For scenario 2, set the acceleration difference threshold, the velocity azimuth angle range, and the displacement azimuth angle range for scenario 2; For scenario 3, set the acceleration difference threshold, the velocity azimuth angle range, and the displacement azimuth angle range for scenario 3; Among them, there is no overlap between the velocity azimuth angle intervals and the displacement azimuth angle intervals under different scenarios; the acceleration difference threshold for scenario 1 is greater than the acceleration difference threshold for scenario 2, and the acceleration difference threshold for scenario 2 is greater than the acceleration difference threshold for scenario 3. Step 2.

1. Calculate the difference between the acceleration values ​​collected by the accelerometer in the current detection cycle and the previous detection cycle, and use this difference as the acceleration difference value for the current detection cycle. If the acceleration difference value is greater than the preset motion threshold, the rocker arm is considered to be in motion and the subsequent steps are entered. Otherwise, the subsequent steps are not performed and Step 2.1 is continued. The time interval between the point when the acceleration difference is greater than the motion threshold and the point when it is less than the motion threshold is set as the detection interval. Step 2.

2. Within the detection range, calculate the velocity azimuth and displacement azimuth based on the acceleration detected by the accelerometer in the current detection cycle; and statistically analyze the acceleration difference for each cycle. Determine whether the acceleration difference, velocity azimuth angle, and displacement azimuth angle belong to the acceleration difference threshold range, velocity azimuth angle range, and displacement azimuth angle range under the three scenarios. Step 2.3 Define the following three conditions: Condition 1. Within the detection interval, the N points with the largest acceleration difference are greater than the acceleration difference threshold for this scenario, where N is the set quantity threshold; Condition 2. Within the detection interval, the velocity azimuth angle belongs to the velocity azimuth angle interval of this scenario; Condition 3. Within the detection interval, the displacement azimuth angle belongs to the displacement azimuth angle interval of this scenario; If two or more of the three conditions in the test result meet the same scenario, then the test interval is considered to belong to that scenario. Otherwise, return to step 2 to continue the test; Step 3. Check whether both doors of the fire door are closed; based on the scenario obtained in Step 2.3 and the closed status of the two doors, determine whether the sequencer is working properly; If scenario 1 is met, the sequencer is considered to be working properly when the first door is closed; otherwise, it is considered to be malfunctioning. If scenario 2 is met, the sequencer is considered to be working properly when the second door is closed; otherwise, it is considered to be malfunctioning. If scenario 3 is met, the sequencer is considered to be working properly when both the first and second doors are open; otherwise, it is considered to be malfunctioning.

2. The intelligent monitoring method for fire door sequencers as described in claim 1, characterized in that, The specific method for calculating the velocity azimuth angle and displacement azimuth angle based on the acceleration detected by the accelerometer during the current detection period in step 2.2 is as follows: The detected acceleration values ​​a in the x and y directions x ,a y The velocity values ​​V of the rocker arm in the x-axis and y-axis directions are obtained by performing first and second integrations respectively. x V y and displacement value L x L y Since the collected acceleration values ​​are discrete, if the acceleration of the object over a period of time is a... x [t] and a y Given [t], where the sampling interval is dt, the formula for calculating the velocity value at sampling point N is: V x [t] = ,V y [t] = , The formula for calculating the displacement value at sampling point N at time N is: L x [t] = ,L y [t] = , Calculate the velocity azimuth and displacement azimuth using the arctangent function. θ V = arctan(V y / V x )、θ L = arctan(L y / L x )。 3. A smart monitoring device for fire door sequencers, characterized in that, The device includes an accelerometer mounted on the rocker arm of the sequencer, the accelerometer having a two-dimensional acceleration detection function, a door detection device for detecting the opening and closing status of the two door leaves of the fire door, and a microcontroller connected to the accelerometer and the door detection device. The microcontroller is also connected to a signal transmission device, and the microcontroller executes the monitoring method as described in any one of claims 1 to 2.

4. The intelligent monitoring device for fire door sequencers as described in claim 3, characterized in that, The door detection device consists of two mechanical push switches, each including a first soft-cap button and a second soft-cap button, which are located at positions that can be triggered by squeezing when the first and second doors of the fire door are closed.

5. The intelligent monitoring device for fire door sequencers as described in claim 4, characterized in that, The mechanical push-button switch has a position adjustment device, which can adjust the position of the soft cap button so that the soft cap button is pressed and triggered when the door is closed.

6. The intelligent monitoring device for fire door sequencers as described in claim 3, characterized in that, The acceleration sensor is mounted on the rocker arm of the sequencer, at one end where a roller is installed.

7. The intelligent monitoring device for fire door sequencers as described in claim 3, characterized in that, The signal transmission device includes a wireless communication module and an antenna connected to the wireless communication module.

8. The intelligent monitoring device for fire door sequencers as described in claim 3, characterized in that, The door detection device includes a magnetic patch installed on the top of the door leaf and a Hall proximity switch located below the top of the door frame. The installation positions of the Hall proximity switch and the magnetic patch cooperate to sense each other when the door leaf is closed.

9. A fire door, comprising a fire door sequencer, characterized in that, It also includes the intelligent monitoring device for the fire door sequencer as described in any one of claims 3 to 8, which is installed on the fire door and connected to the fire door sequencer.

Images