Attached intelligent anti-falling safety belt hook detection device and method
Through magnetic field sensors and laser sensors, and combined with Bluetooth-Internet of Things communication, the problem of traditional seat belt hooks being easily fallen off is solved, achieving efficient and economical safety guarantees for high-altitude operations.
Patent Information
- Application Number
- CN202510959392.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-11
- Publication Date
- 2025-08-15
AI Technical Summary
In existing power aerial operations, traditional seat belt hooks are prone to falling off or incorrectly used, resulting in frequent high-altitude fall accidents. The existing intelligent devices are prone to accidentally triggering or need to replace traditional hooks, which is costly and wasteful.
The attached intelligent anti-fall safety belt hook detection device is adopted, combined with magnetic field sensors and laser sensors, and the hook status is monitored through magnetic field signal changes and laser ranging, a dual threshold judgment mechanism, and combined with Bluetooth-IoT communication, real-time monitoring and sound-light alarms are issued.
It realizes accurate monitoring of the hook status, reduces misjudgment and false alarms, reduces resource waste, ensures safety of high-altitude operations, and can be directly installed on traditional hooks, saving funds.
Smart Images
Figure CN120478873A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of high-altitude action safety management, and in particular to an attached intelligent anti-fall safety belt hook detection device and method. Background Art
[0002] High-altitude work in the power industry is characterized by its wide scope, high operational difficulty, high personnel mobility, and complex risk evolution, making it a high-risk production activity. Among personal injury and death accidents in power construction, falls from heights cause the most deaths and are the most common accident in power construction. Case analysis of personal injury and death accidents at heights reveals that the primary cause of these accidents is the lack of safe and effective fall prevention measures. Currently, the primary protective measure for high-altitude work in the power industry relies on traditional safety belts. When safety belts fail or are used incorrectly by workers at height, such as when the hook becomes detached during movement, the safety of construction workers is threatened. Therefore, it is necessary to improve existing safety belts by using intelligent sensors to monitor whether they are attached to fixed objects during use and whether they are opened incorrectly during operation without following operating procedures, providing proactive alarms. There are already some intelligent safety belt anti-fall protection devices on the market, but most of them use a single sensor to determine whether the safety belt is incorrectly hung during the operation process, which is prone to false triggering or untimely judgment; among them, most use contact sensors, which are prone to wear and damage; and the intelligent devices are added on the premise that the safety belt hook body needs to be changed. However, a large number of traditional safety belts are still retained in construction operations. If all of them are replaced, it will require a large amount of financial support and easily cause waste of resources. Summary of the Invention
[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides an attached intelligent anti-fall safety belt hook detection device and method.
[0004] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is: Provided is an attached intelligent anti-fall safety belt hook detection device, which includes a permanent magnet and a detection device installed on the mounting surface of a movable hook. The permanent magnet is fixed on the mounting surface, and the detection device and the movable hook are arranged separately. The detection device is mounted on the mounting surface through a detachable fixing part. A magnetic field sensor and a laser sensor are provided in the detection device. The magnetic field sensor is used to detect changes in magnetic field signals of the movable hook and the fixed hook when the hook is closed and open. The laser sensor emits a laser signal through a detection port and detects whether an object is hung in the hook by reflecting the signal.
[0005] Furthermore, the device further includes a controller installed in the detection device, and the laser sensor and the magnetic field sensor are both electrically connected to the controller.
[0006] Furthermore, it also includes a flash alarm, a buzzer alarm, a power indicator light, a detection switch and a threshold adjustment knob installed on the detection device. The flash alarm, the buzzer alarm, the power indicator light, the detection switch and the threshold adjustment knob are all electrically connected to the controller, and the flash alarm, the buzzer alarm, the power indicator light, the detection switch and the threshold adjustment knob are all installed on the control panel set up on the detection device.
[0007] Furthermore, the detachable fixing part includes a U-shaped clamp, at least one side of the U-shaped clamp is provided with a threaded hole, a threaded column is threadedly connected to the threaded hole, the outer end of the threaded column is provided with a knob, and the other end is provided with a base that contacts the outer wall of the movable hook.
[0008] Furthermore, the detection device is provided with a battery compartment, and a contact piece that contacts the positive and negative poles of the battery is provided in the battery compartment. The contact piece is electrically connected to the controller, and the battery compartment is encapsulated by a battery cover.
[0009] Furthermore, the method for detecting the change of the magnetic field signal is: S1: After the detection device is installed, turn on the detection switch, and the magnetic field sensor immediately collects the surrounding magnetic flux density data within the set period, and calculates the average magnetic flux density and the standard deviation of the magnetic field density within the set period; , ; in, i is the number of the magnetic flux density data, The first i Magnetic flux density data, N To determine the number of magnetic flux density data collected periodically, is the average magnetic flux density, is the standard deviation of the magnetic field density; S2: According to the average value of magnetic flux density and the standard deviation of the magnetic field density Calculate the low-pass density threshold in the buckle closed state ; S3: Set up a detection device to monitor the sliding time window when the movable hook and the fixed hook are in the buckle closed or buckle open state, and collect data within the sliding time window. n Magnetic flux density data , and calculate the average value of the magnetic flux density within the sliding time window ; ; S4: Based on the magnetic flux density data collected within the sliding time window and the corresponding interval time , calculated as the slope of the magnetic flux density data within the sliding time window k ; ; in, It is the average value of the time interval for collecting magnetic flux density data within the sliding time window; S5: When the magnetic flux density data within the sliding time window , and the slope , then the movable hook and the fixed hook are judged to be in the open state, otherwise, they are in the closed state. is the slope threshold value set.
[0010] Furthermore, the method for detecting whether an object is hanging in the buckle is as follows: A1: When the movable hook and the fixed hook are in the closed state, the laser sensor emits laser light into the hook, and the laser sensor receives the laser light emitted back. The laser travel is calculated based on the time difference between the laser beam emission and reception. d ; ; in, c is the speed of laser light, t 2 is the time of receiving laser, t 1 is the time of emitting laser; A2: Measure the straight-line distance between the position where the laser sensor is installed and the edge of the hook when no object is hung on the hook d 0, as the travel threshold; A3: Compare itineraries d and distance d 0, if , it is determined that the hook does not hang the object, otherwise, the hook hangs the object correctly.
[0011] Furthermore, two detection devices are provided, which are respectively installed on the main hanging buckle and the slave hanging buckle. The two detection devices communicate with each other through a Bluetooth module. The magnetic flux density data and laser data collected by the detection device on the slave hanging buckle are sent to the detection device on the main hanging buckle to determine whether to issue an audible and visual alarm signal.
[0012] Furthermore, it also includes a mobile terminal. The detection device on the main hanging buckle is connected to the mobile terminal through the Internet of Things communication module. The detection device on the main hanging buckle is also equipped with a GPS positioning module. A map module is built on the mobile terminal. The GPS positioning module collects the positioning information of the person using the detection device and displays it on the map module.
[0013] A method for detecting the use status of a safety belt hook using the above-mentioned attached intelligent anti-fall safety belt hook detection device is provided, which comprises the following steps: B1: When using the hook, the operator installs the detection device on the hook installation surface using the detachable fixing parts and turns on the detection switch. The power indicator light indicates whether the detection device can be used normally. If so, proceed to step B2; otherwise, replace the detection device. B2: The magnetic field sensor immediately collects the surrounding magnetic flux density data within the set period, and calculates the average magnetic flux density and the standard deviation of the magnetic field density within the set period; , ; in, i is the number of the magnetic flux density data, The first i Magnetic flux density data, N To determine the number of magnetic flux density data collected periodically, is the average magnetic flux density, is the standard deviation of the magnetic field density; B3: Based on the average value of magnetic flux density and the standard deviation of the magnetic field density Calculate the low-pass density threshold in the buckle closed state ; B4: Set up a detection device to monitor the sliding time window when the movable hook and the fixed hook are in the buckle closed or buckle open state, and collect data within the sliding time window. n Magnetic flux density data , and calculate the average value of the magnetic flux density within the sliding time window ; ; B5: Based on the magnetic flux density data collected within the sliding time window and the corresponding interval time , calculated as the slope of the magnetic flux density data within the sliding time window k ; ; in, It is the average value of the time interval for collecting magnetic flux density data within the sliding time window; B6: When the magnetic flux density data within the sliding time window , and the slope , it is determined that the movable hook and the fixed hook are in the open state; the flash alarm and buzzer alarm emit sound and light alarm signals, and the operator checks whether the hook is really in the open state. If so, the hook is closed. Otherwise, it is determined that the detection is too sensitive, and the threshold adjustment knob is rotated to reduce the detection sensitivity; Otherwise, the buckle is in the closed state. is the slope threshold set; B7: When the movable hook and the fixed hook are in the closed state, the laser sensor emits laser into the hook, and the laser sensor receives the laser emitted back. The laser travel is calculated based on the time difference between the laser beam from emission to reception. d ; ; in, c is the speed of laser light, t 2 is the time of receiving laser, t 1 is the time of emitting laser; B8: Measure the straight-line distance between the position where the laser sensor is installed and the edge of the hook when no object is hung on the hook d 0, as the travel threshold; B9: Compare itineraries d and distance d 0, if , it is determined that the hook is not hanging an object, the flash alarm and buzzer alarm send out sound and light alarm signals, and the staff checks the hook. Otherwise, the hook is hanging an object correctly.
[0014] The beneficial effects of the present invention are as follows: the present invention uses a laser sensor to monitor in real time whether an object is hung during the operation of the seat belt hook, and at the same time uses a magnetic field sensor to accurately monitor whether the buckle is opened incorrectly during use with a dual-threshold judgment mechanism, which not only avoids misjudgment caused by a single threshold, but also effectively reduces false alarms through the coordinated work of the two sensors; adopts a Bluetooth-Internet of Things communication fusion solution, the seat belt hook status information can be transmitted to the mobile terminal of the ground monitoring personnel in real time through wireless communication, and low-power operation is achieved at the same time. Its dual monitoring design further enhances the safety of personnel working at heights; in addition, the detection device designed by the present invention can be directly installed on the existing traditional seat belt hook, and has the advantages of easy installation and disassembly and good functional effects, which can greatly reduce financial expenditure and achieve resource conservation. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the installation and use of the attached intelligent fall protection safety belt hook detection device.
[0016] Figure 2 This is a structural diagram of an attached intelligent anti-fall safety belt hook detection device.
[0017] Figure 3 This is the software principle block diagram of the attached intelligent fall protection safety belt hook detection device.
[0018] Figure 4 This is the hardware principle block diagram of the attached intelligent anti-fall safety belt hook detection device.
[0019] Among them, 1. Hook body, 2. Movable hook, 3. Detection device, 4. Knob, 5. Battery compartment, 6. U-shaped clip, 7. Detection switch, 8. Power indicator light, 9. Flash alarm, 10. Threshold adjustment knob, 11. Fixing hole, 12. Laser sensor, 13. Base, 14. Threaded column, 15. Permanent magnet. DETAILED DESCRIPTION
[0020] The specific embodiments of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all inventions and creations utilizing the concepts of the present invention are protected.
[0021] like Figure 1 and Figure 2 As shown, an attached intelligent anti-fall safety belt hook detection device includes a permanent magnet 15 and a detection device 3 installed on the mounting surface of a movable hook 2. The permanent magnet 15 is fixed on the mounting surface. The detection device 3 and the movable hook 2 are separately arranged. The detection device 3 is installed on the mounting surface through a detachable fixing part. A magnetic field sensor and a laser sensor 12 are arranged in the detection device 3. The magnetic field sensor is used to detect the changes in the magnetic field signal of the movable hook 2 and the fixed hook when the hook is closed and the hook is open. The laser sensor 12 emits a laser signal through the detection port and detects whether there is an object hanging in the hook by reflecting the signal.
[0022] In this embodiment, a controller is further included which is installed in the detection device 3 , and the laser sensor 12 and the magnetic field sensor are both electrically connected to the controller.
[0023] In this embodiment, a flash alarm 9, a buzzer alarm, a power indicator light 8, a detection switch 7 and a threshold adjustment knob 10 are also included and installed on the detection device 3. The flash alarm 9, the buzzer alarm, the power indicator light 8, the detection switch 7 and the threshold adjustment knob 10 are all electrically connected to the controller, and the flash alarm 9, the buzzer alarm, the power indicator light 8, the detection switch 7 and the threshold adjustment knob 10 are all installed on a control panel set on the detection device 3.
[0024] The removable fixing includes a U-shaped clamp 6, with a threaded hole formed on at least one side of the clamp 6. A threaded post 14 is threadedly connected to the threaded hole. The outer end of the post 14 is provided with a knob 4, and the other end is provided with a base 13 that contacts the outer wall of the movable hook 2. During installation, the U-shaped clamp 6 secures the entire detection device 3 to the seatbelt hook body 1, making installation and removal convenient. The detection device 3 is also provided with a fixing hole 11, which allows for expansion of the fixing structure. A cable tie, fixing strap, etc. can be passed through the fixing hole 11 to further secure the detection device 3. After the U-shaped clamp 6 is installed, a gap is left between the inner wall of the U-shaped clamp 6 and the detection device 3 to accommodate a laser sensor 12.
[0025] The detection device 3 is provided with a battery compartment 5, which is provided with contact pieces for contacting the positive and negative poles of the battery. The contact pieces are electrically connected to the controller. The battery compartment 5 is enclosed by a battery cover. The entire detection device 3 carries a power supply, which is convenient for operators to use during remote operations.
[0026] The method for detecting the change of the magnetic field signal in this embodiment is: S1: After the detection device 3 is installed, the detection switch 7 is turned on, and the magnetic field sensor immediately collects the surrounding magnetic flux density data within the set period, and calculates the average magnetic flux density and the standard deviation of the magnetic field density within the set period; , ; in, i is the number of the magnetic flux density data, The first i Magnetic flux density data, N To determine the number of magnetic flux density data collected periodically, is the average magnetic flux density, is the standard deviation of the magnetic field density; S2: According to the average value of magnetic flux density and the standard deviation of the magnetic field density Calculate the low-pass density threshold in the buckle closed state ; S3: Set the detection device 3 to monitor the sliding time window when the movable hook 2 and the fixed hook are in the buckle closed or buckle open state, and collect data within the sliding time window. n Magnetic flux density data , and calculate the average value of the magnetic flux density within the sliding time window ; ; S4: Based on the magnetic flux density data collected within the sliding time window and the corresponding interval time , calculated as the slope of the magnetic flux density data within the sliding time windowk ; ; in, It is the average value of the time interval for collecting magnetic flux density data within the sliding time window; S5: When the magnetic flux density data within the sliding time window , and the slope , then it is determined that the movable hook 2 and the fixed hook are in the open state, otherwise, they are in the closed state. is the slope threshold value set.
[0027] As the seatbelt hook moves from closed to fully open, the magnetic field signal detected by the magnetic field sensor undergoes a nonlinear change, first increasing and then decreasing. During the initial phase of opening, the magnetic flux density increases rapidly. If the hook is only judged based on magnetic flux density, a sudden increase in magnetic flux density due to factors such as vibration could lead to misjudgment. Therefore, we incorporate a determination of the magnetic field change rate, combining multiple conditions into the decision logic to prevent false alarms.
[0028] In order to monitor the speed of magnetic field change in the initial stage of opening and avoid the problem of unreliable instantaneous slope due to speed change, a sliding window is used to dynamically calculate the local slope. Since the acquisition frequency is fixed, the acquisition time can be set to a fixed value.
[0029] The method of detecting whether an object is hanging in the buckle in this embodiment is as follows: A1: When the movable hook 2 and the fixed hook are in the closed state, the laser sensor emits laser light into the hook, and the laser sensor 12 receives the laser light emitted back. The laser travel is calculated based on the time difference between the laser beam emission and reception. d ; ; in, c is the speed of laser light, t 2 is the time of receiving laser, t 1 is the time of emitting laser; A2: Measure the straight-line distance between the position where the laser sensor 12 is installed and the edge of the hook when no object is hung on the hook d 0, as the travel threshold; A3: Compare itineraries d and distance d 0, if , it is determined that the hook does not hang the object, otherwise, the hook hangs the object correctly.
[0030] To determine whether the seatbelt hook buckle is properly attached to an object, a laser sensor 12 in the additional detection device 3 detects the presence of an object within the hook. Laser sensor 12 operates on the following principle: Laser sensor 12 emits a laser beam, typically a short pulse or continuous wave laser. This laser beam is highly directional and monochromatic, enabling it to precisely point at a target object. When the laser beam strikes the target object, a portion of the laser light is reflected back by the object, and the sensor's receiver detects the reflected light. By measuring the time difference between the laser beam's emission and reception, the distance the laser beam has traveled can be calculated, thereby determining whether the hook is attached to a fixed object.
[0031] There are two detection devices 3, which are respectively installed on the main hanging buckle and the slave hanging buckle. The two detection devices 3 communicate with each other through a Bluetooth module. The magnetic flux density data and laser data collected by the detection device 3 on the slave hanging buckle are sent to the detection device 3 on the main hanging buckle to determine whether to issue an audible and visual alarm signal.
[0032] It also includes a mobile terminal. The detection device 3 on the main hanging buckle is connected to the mobile terminal through the Internet of Things communication module. The detection device 3 on the main hanging buckle is also equipped with a GPS positioning module. A map module is built on the mobile terminal. The GPS positioning module collects the positioning information of the person using the detection device 3 and displays it on the map module.
[0033] like Figure 3 and Figure 4 As shown, this embodiment can utilize dual hooks, thus comprising a master hook hardware circuit and a slave hook hardware circuit. The circuitry can be broadly divided into a power management module, a signal acquisition module, and a data processing module. The power management module includes a lithium battery charging and protection circuit, a voltage stabilization circuit, a switching circuit, and a storage battery, providing energy for the monitoring system. The signal acquisition module includes magnetic field signal acquisition and laser ranging, enabling the collection of magnetic field change signals and laser ranging distance signals. In this embodiment, the magnetic field sensor utilizes a Hall effect sensor. The data processing module includes an STM32 controller, a Bluetooth module, and a GPS+NB-IoT module. The STM32 controllers on the master and slave hooks execute various logic decisions and perform corresponding tasks. The Bluetooth module enables communication between the two hooks, enabling dual hook coordination and ground-based close-range monitoring. The GPS module locates the position of the aerial worker, and the NB-IoT module provides ground-based long-range monitoring. Finally, the safety belt is correctly used based on pre-set logic. If not, the control module controls the device to issue an audible and visual alarm, which is then wirelessly transmitted to the mobile phone of the ground monitoring personnel. This double-checks the safety belt hook usage to prevent the risk of a fall.
[0034] The hanging status and opening and closing status of the two safety belt hooks are monitored. When working at height, at least one of the two hooks is in a state of hanging objects and closed. It is judged to be used correctly. Otherwise, it is judged to be used incorrectly, and an audible and visual alarm is issued to remind the high-altitude workers that the safety belt hooks are not used correctly. At the same time, the Bluetooth module of the data acquisition module feeds back a distance to the ground monitoring end through the connection with the Android client. If the distance is close, the Bluetooth module is used to report the data. If the distance is far, the NB-IoT module is used to report the data. The Android end simultaneously prompts the ground monitoring personnel to remind the high-altitude workers to check the status of the safety belt. At the same time, the real-time location information of the high-altitude workers is uploaded at a certain rate during the whole process.
[0035] The method for detecting the use status of the safety belt hook using the above-mentioned attached intelligent anti-fall safety belt hook detection device 3 includes the following steps: B1: When using the hook, the operator installs the detection device 3 on the hook installation surface of the hook using the detachable fixing parts and turns on the detection switch 7. The power indicator light 8 indicates whether the detection device 3 can be used normally. If so, proceed to step B2; otherwise, replace the detection device 3. B2: The magnetic field sensor immediately collects the surrounding magnetic flux density data within the set period, and calculates the average magnetic flux density and the standard deviation of the magnetic field density within the set period; , ; in, i is the number of the magnetic flux density data, The first i Magnetic flux density data, N To determine the number of magnetic flux density data collected periodically, is the average magnetic flux density, is the standard deviation of the magnetic field density; B3: Based on the average value of magnetic flux density and the standard deviation of the magnetic field density Calculate the low-pass density threshold in the buckle closed state ; B4: Set the detection device 3 to monitor the sliding time window when the movable hook 2 and the fixed hook are in the buckle closed or buckle open state, and collect data within the sliding time window. n Magnetic flux density data , and calculate the average value of the magnetic flux density within the sliding time window ; ; B5: Based on the magnetic flux density data collected within the sliding time window and the corresponding interval time , calculated as the slope of the magnetic flux density data within the sliding time window k ; ; in, It is the average value of the time interval for collecting magnetic flux density data within the sliding time window; B6: When the magnetic flux density data within the sliding time window , and the slope , it is determined that the movable hook 2 and the fixed hook are in the open state; the flash alarm 9 and the buzzer alarm emit an audible and visual alarm signal, and the operator checks whether the hook is actually in the open state. If so, the hook is closed. Otherwise, it is determined that the detection is too sensitive, and the threshold adjustment knob 10 is rotated to reduce the sensitivity of the detection; Otherwise, the buckle is in the closed state. is the slope threshold set; B7: After the movable hook 2 and the fixed hook are in the closed state, the laser sensor emits laser light into the hook, and the laser sensor 12 receives the laser light emitted back. The laser travel is calculated based on the time difference between the laser beam emission and reception. d ; ; in, c is the speed of laser light, t 2 is the time of receiving laser, t 1 is the time of emitting laser; B8: Measure the straight-line distance between the position where the laser sensor 12 is installed and the edge of the hook when no object is hung on the hook d 0, as the travel threshold; B9: Compare itineraries d and distance d 0, if , it is determined that the hook is not hanging an object, the flash alarm 9 and the buzzer alarm send out sound and light alarm signals, and the staff checks the hook. Otherwise, the hook is hanging an object correctly.
[0036] The present invention uses a laser sensor 12 to monitor in real time whether an object is hung during the operation of the seat belt hook, and at the same time uses a magnetic field sensor to accurately monitor whether the buckle is opened incorrectly during use with a dual-threshold judgment mechanism, thereby avoiding misjudgment caused by a single threshold and effectively reducing false alarms through the collaborative work of the two sensors; adopting a Bluetooth-Internet of Things communication fusion solution, the seat belt hook status information can be transmitted to the mobile terminal of the ground monitoring personnel in real time through wireless communication, while achieving low-power operation, and its dual monitoring design further enhances the safety of personnel working at heights; in addition, the detection device designed by the present invention can be directly installed on the existing traditional seat belt hook, and has the advantages of easy installation and disassembly and good functional effects, which can greatly reduce financial expenditure and achieve resource conservation.
Claims
1. An attached intelligent anti-fall safety belt hook detection device, characterized in that: It includes a permanent magnet and a detection device installed on the mounting surface of the movable hook, the permanent magnet is fixed on the mounting surface, the detection device and the movable hook are arranged separately, the detection device is installed on the mounting surface through a detachable fixing part, a magnetic field sensor is provided in the detection device, and a laser sensor is installed on the side of the detection device. The magnetic field sensor is used to detect the changes in the magnetic field signal of the movable hook and the fixed hook when the hook is closed and the hook is open. The laser sensor emits a laser signal through the detection port and detects whether there is an object hanging in the hook by reflecting the signal.
2. The attached intelligent anti-fall safety belt hook detection device according to claim 1, characterized in that: The detection device also includes a controller installed in the detection device, and the laser sensor and the magnetic field sensor are both electrically connected to the controller.
3. The attached intelligent anti-fall safety belt hook detection device according to claim 2, characterized in that: It also includes a flash alarm, a buzzer alarm, a power indicator light, a detection switch and a threshold adjustment knob installed on the detection device. The flash alarm, buzzer alarm, power indicator light, detection switch and threshold adjustment knob are all electrically connected to the controller, and the flash alarm, buzzer alarm, power indicator light, detection switch and threshold adjustment knob are all installed on the control panel set on the detection device.
4. The attached intelligent anti-fall safety belt hook detection device according to claim 3, characterized in that: The detachable fixing part includes a U-shaped clip, at least one side of the U-shaped clip is provided with a threaded hole, a threaded column is threadedly connected to the threaded hole, the outer end of the threaded column is provided with a knob, and the other end is provided with a base that contacts the outer wall of the movable hook.
5. The attached intelligent anti-fall safety belt hook detection device according to claim 4, characterized in that: The detection device is provided with a battery compartment, and a contact piece that contacts the positive and negative poles of the battery is provided in the battery compartment. The contact piece is electrically connected to the controller, and the battery compartment is encapsulated by a battery cover.
6. The attached intelligent anti-fall safety belt hook detection device according to claim 5, characterized in that: The method for detecting the change of the magnetic field signal is: S1: After the detection device is installed, turn on the detection switch, and the magnetic field sensor immediately collects the surrounding magnetic flux density data within the set period, and calculates the average magnetic flux density and the standard deviation of the magnetic field density within the set period; ， ； in, i is the number of the magnetic flux density data, The first i Magnetic flux density data, N To determine the number of magnetic flux density data collected periodically, is the average magnetic flux density, is the standard deviation of the magnetic field density; S2: According to the average value of magnetic flux density and the standard deviation of the magnetic field density Calculate the low-pass density threshold in the buckle closed state ; S3: Set up a detection device to monitor the sliding time window when the movable hook and the fixed hook are in the buckle closed or buckle open state, and collect data within the sliding time window. n Magnetic flux density data , and calculate the average value of the magnetic flux density within the sliding time window ; ； S4: Based on the magnetic flux density data collected within the sliding time window and the corresponding interval time , calculated as the slope of the magnetic flux density data within the sliding time window k ; ； in, It is the average value of the time interval for collecting magnetic flux density data within the sliding time window; S5: When the magnetic flux density data within the sliding time window , and the slope , then the movable hook and the fixed hook are judged to be in the open state, otherwise, they are in the closed state. is the slope threshold value set.
7. The attached intelligent anti-fall safety belt hook detection device according to claim 6, characterized in that: The method for detecting whether an object is hung in the buckle is as follows: A1: When the movable hook and the fixed hook are in the closed state, the laser sensor emits laser light into the hook, and the laser sensor receives the laser light emitted back. The laser travel is calculated based on the time difference between the laser beam emission and reception. d ; ； in, c is the speed of laser light, t 2 is the time of receiving laser, t 1 is the time of emitting laser; A2: Measure the straight-line distance between the position where the laser sensor is installed and the edge of the hook when no object is hung on the hook d 0, as the travel threshold; A3: Compare itineraries d and distance d 0, if , it is determined that the hook does not hang the object, otherwise, the hook hangs the object correctly.
8. The attached intelligent anti-fall safety belt hook detection device according to claim 7, characterized in that: There are two detection devices, which are respectively installed on the main hanging buckle and the slave hanging buckle. The two detection devices communicate with each other through a Bluetooth module. The magnetic flux density data and laser data collected by the detection device on the slave hanging buckle are sent to the detection device on the main hanging buckle to determine whether to issue an audible and visual alarm signal.
9. The attached intelligent anti-fall safety belt hook detection device according to claim 8, characterized in that: It also includes a mobile terminal. The detection device on the main hanging buckle is connected to the mobile terminal through an Internet of Things communication module. The detection device on the main hanging buckle is also equipped with a GPS positioning module. A map module is built on the mobile terminal. The GPS positioning module collects the positioning information of the person using the detection device and displays it on the map module.
10. A method for detecting the use status of a safety belt hook using the attached intelligent anti-fall safety belt hook detection device according to claim 7, characterized in that: The following steps are included: B1: When using the hook, the operator installs the detection device on the hook installation surface using the detachable fixing parts and turns on the detection switch. The power indicator light indicates whether the detection device can be used normally. If so, proceed to step B2; otherwise, replace the detection device. B2: The magnetic field sensor immediately collects the surrounding magnetic flux density data within the set period, and calculates the average magnetic flux density and the standard deviation of the magnetic field density within the set period; ， ； in, i is the number of the magnetic flux density data, The first i Magnetic flux density data, N To determine the number of magnetic flux density data collected periodically, is the average magnetic flux density, is the standard deviation of the magnetic field density; B3: Based on the average value of magnetic flux density and the standard deviation of the magnetic field density Calculate the low-pass density threshold in the buckle closed state ; B4: Set up a detection device to monitor the sliding time window when the movable hook and the fixed hook are in the buckle closed or buckle open state, and collect data within the sliding time window. n Magnetic flux density data , and calculate the average value of the magnetic flux density within the sliding time window ; ； B5: Based on the magnetic flux density data collected within the sliding time window and the corresponding interval time , calculated as the slope of the magnetic flux density data within the sliding time window k ; ； in, It is the average value of the time interval for collecting magnetic flux density data within the sliding time window; B6: When the magnetic flux density data within the sliding time window , and the slope , it is determined that the movable hook and the fixed hook are in the open state; the flash alarm and buzzer alarm emit sound and light alarm signals, and the operator checks whether the hook is really in the open state. If so, the hook is closed. Otherwise, it is determined that the detection is too sensitive, and the threshold adjustment knob is rotated to reduce the detection sensitivity; Otherwise, the buckle is in the closed state. is the slope threshold set; B7: When the movable hook and the fixed hook are in the closed state, the laser sensor emits laser into the hook, and the laser sensor receives the laser emitted back. The laser travel is calculated based on the time difference between the laser beam from emission to reception. d ; ； in, c is the speed of laser light, t 2 is the time of receiving laser, t 1 is the time of emitting laser; B8: Measure the straight-line distance between the position where the laser sensor is installed and the edge of the hook when no object is hung on the hook d 0, as the travel threshold; B9: Compare itineraries d and distance d 0, if , it is determined that the hook is not hanging an object, the flash alarm and buzzer alarm send out sound and light alarm signals, and the staff checks the hook. Otherwise, the hook is hanging an object correctly.