High-altitude operation protection loss automatic alarm system and method
Patent Information
- Application Number
- CN202411741589.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-03-11
AI Technical Summary
[0005]1)进行远程沟通的系统中缺乏加密措施，即便是受到简单的信息攻击，也难以保证传输的正常运行；
[0026] The technical solution of the present invention uses the lora wireless communication protocol to realize the security control of multiple groups of intelligent security hooks by the security management terminal, and realizes multiple controls of one machine; at the same time, an AES encryption unit is added to encrypt the control process data to further improve security; a forced opening or unlocking mechanism is also set up to avoid the situation where high-altitude workers cannot escape when facing an emergency.
Smart Images
Figure CN119600749A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of aerial work safety, and in particular to an automatic alarm system and method for aerial work that loses protection. Background Art
[0002] In the fields of construction and power grid, high-altitude operations are often involved, and workers are often required to use hooks to wear safety belts, fire ropes and other safety equipment to protect their personal safety.
[0003] At present, in order to improve the safety of workers working at heights, an anti-double-unfastening system is being adopted, that is, when workers wear two safety belts, it is forbidden to unfasten both safety belts at the same time, so as to ensure that workers have at least one safety belt to protect their personal safety. For example, multiple detection modules are used on the hook to obtain the various vital signs and height from the ground of the workers working at heights. At the same time, a Bluetooth communication module is set on the hook and the 4G / 5G network is used to realize data interaction with the remote terminal, so as to remotely control the hook status of the workers working at heights.
[0004] However, the current anti-double-unlock security measures include at least the following three problems:
[0005] 1) The system for remote communication lacks encryption measures, and even if it is attacked by simple information, it is difficult to ensure the normal operation of the transmission;
[0006] 2) Using 4G / 5G networks for remote transmission is costly and power-hungry, and requires reliance on operators for operation;
[0007] 3) There is a lack of simultaneous control over multiple high-altitude workers at the same time, and only one high-altitude worker can be controlled accordingly. There is also a lack of methods to force high-altitude workers to escape in an emergency. Summary of the invention
[0008] The purpose of the present invention is to propose an automatic alarm system and method for loss of protection in aerial work, which uses the lora wireless communication protocol to realize the safety control of multiple groups of intelligent safety hooks by the security management terminal, realizing multiple controls in one machine; at the same time, an AES encryption unit is added to encrypt data in the control process to further improve security; a forced opening mechanism is also set to avoid the situation where aerial workers cannot escape when facing an emergency.
[0009] An automatic alarm system for loss of protection in high-altitude operations, comprising a safety management terminal and at least one set of intelligent safety hooks, each set of intelligent safety hooks comprising two identical intelligent safety hooks, and each high-altitude operator wearing a corresponding set of intelligent safety hooks;
[0010] Each intelligent safety hook includes a contact switch, a height sensor, a temperature sensor, a remote locking component, a battery, a control chip and a voice module; the contact switch is used for high-altitude workers to control the unlocking and locking states of the remote locking component; the height sensor is used to obtain height information and transmit it to the control chip; the temperature sensor is used to obtain temperature information and transmit it to the control chip; the remote locking component is used to receive remote unlocking and locking from high-altitude workers or from the security management terminal through the control chip; the voice module receives prompt information from the security management terminal through the control chip and makes voice broadcasts based on the prompt information; the battery is used to power the height sensor, temperature sensor, control chip and voice module; the control chip has a built-in lora communication module, which connects to the security management terminal through the lora wireless communication protocol; the control chip also has a built-in specific identifier, which is used by the security management terminal to distinguish the corresponding grouping of each intelligent safety hook;
[0011] The security management terminal is provided with an AES encryption unit, a storage unit, a communication unit and a control unit; the AES encryption unit is used to encrypt and protect the communication unit and any lora communication module during data communication; the storage unit is used to store each data of the corresponding high-altitude workers obtained by the control chip corresponding to each group of intelligent safety hooks; the control unit is provided with an anti-double-decoding mechanism, and the control unit is used to control the locking state of the remote control locking component of each group of intelligent safety hooks.
[0012] Preferably, when the two remote-controlled locking components corresponding to each aerial worker are in the open state, the voice module and the safety management terminal simultaneously issue an early warning.
[0013] Preferably, in any intelligent safety hook, the control chip stores a preset safety specification file, and the voice module gives voice reminders to the high-altitude workers when they are operating according to the safety specification file.
[0014] Preferably, the battery is a rechargeable lithium battery, and the lithium battery is charged using a type-c interface.
[0015] Preferably, in any intelligent safety hook, the remote control locking assembly is provided with a forced opening or unlocking mechanism, and the forced opening or unlocking mechanism is: when the contact switch is pressed for a long time by the height worker to reach the forced opening time, the remote control locking assembly will be forced to open.
[0016] Preferably, each intelligent safety hook also includes a wind sensor and a particle sensor. The wind sensor is used to transmit wind information to the safety management terminal through the control chip, and the particle sensor is used to transmit particle concentration information in the air to the safety management terminal through the control chip.
[0017] Preferably, the security management terminal is provided with a shutdown mode, a sleep mode and a normal operation mode; when the security management terminal does not detect any set of information of intelligent security hooks, the security management terminal automatically enters the sleep mode or the shutdown mode; when the security management terminal detects any set of information of intelligent security hooks, the security management terminal automatically enters the normal operation mode.
[0018] Preferably, the storage unit adopts a dual-layer storage architecture, including a first storage layer and a second storage layer, the capacity of the first storage layer is smaller than the capacity of the second storage layer, the read and write speeds of the first storage layer are greater than the read and write speeds of the second storage layer, the first storage layer is used to store any data within a set time range, and the second storage layer is used to store any data outside the set time range.
[0019] An automatic alarm method for high-altitude work without protection includes the following steps:
[0020] S1. When the remote control locking component receives an opening or unlocking signal, the control chip determines whether the opening or unlocking signal is triggered by a high-altitude worker or a remote trigger of the safety management terminal;
[0021] S2. When the control chip determines that the opening or unlocking signal is triggered by the high-altitude worker, the control chip determines whether the high-altitude work task is a single person or multiple people; when the high-altitude work task is a single person, the control chip asks through the voice module whether it is determined that the remote control locking component needs to be opened or unlocked. When the voice module receives a "yes" reply, the control chip opens or unlocks the remote control locking component; when the voice module does not receive a reply within the preset time, the control chip automatically alarms the safety management terminal, and the safety management terminal judges whether the data value of the height sensor and / or temperature sensor of the high-altitude worker changes within the set time and exceeds the set threshold, and then gives an audible and visual alarm and arranges rescue; when the set threshold is exceeded, the safety management terminal gives an audible and visual alarm and arranges rescue; when the set threshold is not exceeded, the safety management terminal asks "Is it safe" a set number of times through the voice module of the control chip. When no reply is received after the set number of times, the safety management terminal gives an audible and visual alarm and arranges rescue;
[0022] When multiple people are involved in the aerial work, the control chip communicates with the safety management terminal, and the safety management terminal controls the voice modules of the intelligent safety hooks of multiple workers to ask "whether the contact switches of other workers have been touched by mistake". When a voice module receives a "yes" reply, the safety management terminal closes or locks the opening or unlocking signal; when no voice module receives a "yes" reply within the set time, the safety management terminal inquires "whether it is safe" a set number of times through the voice module of the control chip. When no reply is received after the set number of times, the safety management terminal issues an audible and visual warning and arranges rescue;
[0023] S3. When the control chip determines that the opening or unlocking signal is remotely triggered by the security management terminal, the control chip encrypts the specific identifier through the lora communication module to obtain an encrypted signal, and the control chip transmits the encrypted signal to the security management terminal. If the control chip does not receive a reply from the security management terminal within the preset time or the security management terminal does not send an instruction to upload the encrypted signal, the control chip closes or locks the opening or unlocking signal.
[0024] Preferably, it also includes: the control chip encrypts the data value of the altitude sensor and / or temperature sensor through the lora communication module to obtain a secondary encrypted signal, and the control chip transmits the secondary encrypted signal to the security management terminal. If no reply is received from the security management terminal within the preset time or the security management terminal does not send an instruction to upload the secondary encrypted signal or the data value of the altitude sensor and / or temperature sensor decoded by the security management terminal is different from the data in the storage unit, the control chip closes or locks the opening or unlocking signal.
[0025] Compared with the prior art, the present invention has the following beneficial effects:
[0026] The technical solution of the present invention utilizes the LoRa wireless communication protocol to realize the safety control of multiple groups of intelligent safety hooks by the security management terminal, realizing multiple controls by one machine; at the same time, an AES encryption unit is added to encrypt data during the control process to further improve security; a forced opening or unlocking mechanism is also provided to prevent high-altitude workers from being unable to escape in the face of an emergency. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural schematic diagram of the automatic alarm system for loss of protection of high-altitude operations of the present invention. DETAILED DESCRIPTION
[0028] The technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0029] Embodiment 1
[0030] like Figure 1 The figure shows a schematic diagram of the structure of an automatic alarm system for loss of protection during high-altitude operations. The safety management terminal is used to remotely monitor each intelligent safety hook, realizing one machine with multiple controls. The safety status of multiple high-altitude workers can be obtained at the same time or safety reminders can be given to them.
[0031] The system includes a safety management terminal and at least one group of intelligent safety hooks, each group of intelligent safety hooks includes two identical intelligent safety hooks, that is, two in a group, and each high-altitude worker wears a corresponding group of intelligent safety hooks when performing high-altitude work.
[0032] In this embodiment, each intelligent safety hook includes a contact switch, a height sensor, a temperature sensor, a remote locking component, a battery, a control chip and a voice module.
[0033] The contact switch is used for aerial workers to control the opening and closing state of the remote control locking assembly; when the contact switch is long pressed or the trigger conduction conditions are met, the remote control locking assembly is unlocked and the smart safety hook can be opened, otherwise the smart safety hook cannot be opened.
[0034] The height sensor is used to obtain the current height information and transmit it to the control chip.
[0035] The temperature sensor is used to obtain the current temperature information and transmit it to the control chip.
[0036] The remote control locking component is used to receive remote opening and closing from high-altitude workers or security management terminals through control chips; when the remote control locking component is opened or unlocked, the intelligent safety hook can be opened, otherwise the intelligent safety hook cannot be opened when the remote control locking component is closed or locked.
[0037] The voice module receives the prompt information from the security management terminal through the control chip and makes voice broadcast based on the prompt information.
[0038] The battery is used to power the altitude sensor, temperature sensor, control chip and voice module.
[0039] The control chip has a built-in LoRa communication module, which is connected to the security management terminal through the LoRa wireless communication protocol.
[0040] In order to enable the safety management terminal to distinguish the corresponding smart safety hooks of each high-altitude worker when performing multiple controls with one machine, a specific identifier is also built into each control chip. The specific identifier is used by the safety management terminal to distinguish the corresponding grouping of each smart safety hook. For example, the two specific identifiers in a group of smart safety hooks worn by high-altitude worker 1 are A1 and A2, and the two specific identifiers in a group of smart safety hooks worn by high-altitude worker 2 are B1 and B2. The safety management terminal can accurately identify A1 and A2 as a group, and B1 and B2 as a group to avoid confusion.
[0041] In this embodiment, the security management terminal is provided with an AES encryption unit, a storage unit, a communication unit and a control unit.
[0042] The AES encryption unit is used to encrypt and protect the communication unit and any lora communication module during data communication to improve data security and the stable operation of the system. The storage unit is used to store each data of the corresponding high-altitude workers obtained by the control chip corresponding to each set of intelligent safety hooks; the control unit is equipped with an anti-double-decoding mechanism, and the control unit is used to control the locking state of each set of intelligent safety hooks.
[0043] Preferably, the storage unit adopts a double-layer storage architecture, including a first storage layer and a second storage layer, the capacity of the first storage layer is smaller than that of the second storage layer, the read and write speed of the first storage layer is greater than that of the second storage layer, the first storage layer is used to store any data within a set time range, and the second storage layer is used to store any data outside the set time range. The double-layer storage architecture can effectively store data of different periods, which is convenient for long-term data processing. The first storage layer uses high-performance SSD or RAM, and the second storage layer uses large-capacity and low-cost HDD or cloud storage, so that a balance can be achieved between performance and cost.
[0044] For the historical data in the second storage layer, a regular clearing mechanism can also be set up to clear historical data that is too old, for example, historical data older than three years. This part of data is less likely to be used again and can be cleared in time to leave enough storage space. In addition, if you do not want to clear historical data that is too old, you can perform multiple compressions on this part of data to reduce the storage capacity it occupies, or you can leave enough storage capacity.
[0045] Preferably, when the two remote control locking components corresponding to each high-altitude operator are both in the open or unlocked state, it means that the high-altitude operator is either in an emergency or in serious violation of the operation, and an early warning must be issued at this time. Therefore, the voice module and the security management terminal can issue an early warning at the same time. When the state of the remote control locking component does not meet the safety regulations, a double early warning can effectively remind the high-altitude operator and other staff to deal with it in time.
[0046] Preferably, in any intelligent safety hook, the control chip stores a preset safety specification file, and the voice module gives voice reminders to the high-altitude workers when they are operating according to the safety specification file, so as to guide or remind the high-altitude workers. The voice module reminds the high-altitude workers according to the safety specification file, which can effectively improve safety.
[0047] In this embodiment, the battery adopts a rechargeable large-capacity lithium battery, which is convenient for long-term operation. The lithium battery is also charged using a type-c interface. The type-c interface has a wide range of applications and is easy to use.
[0048] Preferably, in any of the intelligent safety hooks, the remote control locking assembly is provided with a forced opening or unlocking mechanism, and the forced opening mechanism is: when the contact switch is pressed for a long time by the high-altitude worker to reach the forced opening time, the remote control locking assembly will be forced to open. After long-term work, high-altitude workers may encounter the situation where they need to open two intelligent safety hooks on their bodies at the same time, for example, the two hooks are stuck at the same time in the air and they cannot get out, or the high-altitude workers are very close to the ground or have reached the ground and both hooks cannot be opened, etc. At this time, since the safety management terminal cannot open the two intelligent safety hooks at the same time by default, a forced opening mechanism is set to prevent high-altitude workers from being locked and unable to get out under certain circumstances.
[0049] In addition, the forced opening mechanism can be divided into a dual forced opening mechanism. First, when the contact switch is long pressed for the first time, for example, long pressed for 30 seconds, the security management terminal receives the forced request, and manual operation allows the two smart safety hooks to open; second, when the contact switch is long pressed for the first time, for example, long pressed for 30 seconds, the security management terminal has no response. At this time, continue to long press until the second time, for example, 45 seconds, the two smart safety hooks are forced to open automatically.
[0050] Optionally, each intelligent safety hook further includes a wind sensor and a particle sensor. The wind sensor is used to transmit wind information to the safety management terminal through the control chip, and the particle sensor is used to transmit particle concentration information in the air to the safety management terminal through the control chip. Obtaining information on wind force and particle concentration can better obtain the current weather conditions, which is convenient for managing the personal safety and health of high-altitude workers.
[0051] Optionally, after the safety management unit obtains information on temperature, altitude, wind speed and particulate matter concentration, it can obtain the working hours and operating requirements of high-altitude workers based on corresponding safety work specifications, and use the voice module to provide corresponding reminders; it can also store the corresponding data to facilitate later comparison and inspection based on relevant data and the actual work of high-altitude workers.
[0052] In this embodiment, the security management terminal is provided with a shutdown mode, a sleep mode, and a normal operation mode. The shutdown mode means that the security management terminal stops running. When the security management terminal does not detect any set of information of the intelligent safety hook, the security management terminal automatically enters the sleep mode; when the security management terminal detects any set of information of the intelligent safety hook, the security management terminal automatically enters the normal operation mode. The security management terminal is provided with three modes, which can effectively respond to different work requirements.
[0053] In summary, the present invention utilizes the lora wireless communication protocol to implement the security control of multiple groups of intelligent safety hooks by the security management terminal, realizing multiple controls with one machine; at the same time, an AES encryption unit is added to encrypt data during the control process to further improve security; a forced opening mechanism is also provided to prevent high-altitude workers from being unable to escape in the face of an emergency.
[0054] Embodiment 2
[0055] This embodiment is an improvement on the first embodiment.
[0056] An automatic alarm method for high-altitude work without protection includes the following steps:
[0057] S1. When the remote control locking component receives an opening or unlocking signal, the control chip determines whether the opening or unlocking signal is triggered by a high-altitude worker or a remote trigger of the safety management terminal;
[0058] S2. When the control chip determines that the opening or unlocking signal is triggered by the high-altitude worker, the control chip determines whether the high-altitude work task is a single person or multiple people; when the high-altitude work task is a single person, the control chip asks through the voice module whether it is determined that the remote control locking component needs to be opened or unlocked. When the voice module receives a "yes" reply, the control chip opens or unlocks the remote control locking component; when the voice module does not receive a reply within the preset time, the control chip automatically alarms the safety management terminal, and the safety management terminal judges whether the data value of the height sensor and / or temperature sensor of the high-altitude worker changes within the set time and exceeds the set threshold, and then gives an audible and visual alarm and arranges rescue; when the set threshold is exceeded, the safety management terminal gives an audible and visual alarm and arranges rescue; when the set threshold is not exceeded, the safety management terminal asks "Is it safe" a set number of times through the voice module of the control chip. When no reply is received after the set number of times, the safety management terminal gives an audible and visual alarm and arranges rescue;
[0059] When multiple people are involved in the aerial work, the control chip communicates with the safety management terminal, and the safety management terminal controls the voice modules of the intelligent safety hooks of multiple workers to ask "whether the contact switches of other workers have been touched by mistake". When a voice module receives a "yes" reply, the safety management terminal closes or locks the opening or unlocking signal; when no voice module receives a "yes" reply within the set time, the safety management terminal inquires "whether it is safe" a set number of times through the voice module of the control chip. When no reply is received after the set number of times, the safety management terminal issues an audible and visual warning and arranges rescue;
[0060] The setting time can be 1-10s, the setting threshold of the height sensor can be 2-20m, and the setting threshold of the temperature sensor can be 1-10℃; this embodiment takes into account that if the operator has a sudden change in height or temperature during high-altitude work, in order to avoid danger to the operator, the safety management terminal determines whether the data value of the height sensor or temperature sensor of the high-altitude operator changes within the set time and exceeds the set threshold, and then gives an audible and visual warning and arranges rescue, thereby improving safety.
[0061] Optionally, the setting number can be 2-5 times.
[0062] S3. When the control chip determines that the opening or unlocking signal is remotely triggered by the security management terminal, the control chip encrypts the specific identifier through the lora communication module to obtain an encrypted signal, and the control chip transmits the encrypted signal to the security management terminal. If the control chip does not receive a reply from the security management terminal within the preset time or the security management terminal does not send an instruction to upload the encrypted signal, the control chip closes or locks the opening or unlocking signal.
[0063] A single encrypted signal is used to prevent security incidents caused by network attacks that may result from the remote locking component receiving an opening or unlocking signal.
[0064] Optionally, in order to further improve the security threshold, the control chip encrypts the data value of the altitude sensor and / or temperature sensor through the lora communication module to obtain a secondary encrypted signal, and the control chip transmits the secondary encrypted signal to the security management terminal. If no reply is received from the security management terminal within the preset time or the security management terminal does not send an instruction to upload the secondary encrypted signal or the data value of the altitude sensor and / or temperature sensor decoded by the security management terminal is different from the data in the storage unit, the control chip turns off or locks the open or unlock signal.
[0065] The above embodiments are only for illustrating the technical idea of the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention.
Claims
1. An automatic alarm system for loss of protection in high-altitude operations, characterized in that: It includes a safety management terminal and at least one set of intelligent safety hooks, each set of intelligent safety hooks includes two identical intelligent safety hooks, and each high-altitude operator wears a corresponding set of intelligent safety hooks; Each intelligent safety hook includes a contact switch, a height sensor, a temperature sensor, a remote locking component, a battery, a control chip and a voice module; the contact switch is used for high-altitude workers to control the unlocking and locking states of the remote locking component; the height sensor is used to obtain height information and transmit it to the control chip; the temperature sensor is used to obtain temperature information and transmit it to the control chip; the remote locking component is used to receive remote unlocking and locking from high-altitude workers or from the security management terminal through the control chip; the voice module receives prompt information from the security management terminal through the control chip and makes voice broadcasts based on the prompt information; the battery is used to power the height sensor, temperature sensor, control chip and voice module; the control chip has a built-in lora communication module, which connects to the security management terminal through the lora wireless communication protocol; the control chip also has a built-in specific identifier, which is used by the security management terminal to distinguish the corresponding grouping of each intelligent safety hook; The security management terminal is provided with an AES encryption unit, a storage unit, a communication unit and a control unit; the AES encryption unit is used to encrypt and protect the communication unit and any lora communication module during data communication; the storage unit is used to store each data of the corresponding high-altitude workers obtained by the control chip corresponding to each group of intelligent safety hooks; the control unit is provided with an anti-double-decoding mechanism, and the control unit is used to control the locking state of the remote control locking component of each group of intelligent safety hooks.
2. The automatic alarm system for loss of protection of aerial work according to claim 1 is characterized in that: When the two remote-controlled locking components corresponding to each high-altitude worker are in the open state, the voice module and the safety management terminal will issue an early warning at the same time.
3. The automatic alarm system for loss of protection of aerial work according to claim 1 is characterized in that: In any intelligent safety hook, the control chip stores a preset safety specification file, and the voice module gives voice reminders when the high-altitude workers are operating according to the safety specification file.
4. The automatic alarm system for loss of protection of aerial work according to claim 1 is characterized in that: The battery uses a rechargeable lithium battery, which is charged using a type-c interface.
5. The automatic alarm system for loss of protection of aerial work according to claim 1 is characterized in that: In any intelligent safety hook, the remote control locking component is provided with a forced opening or unlocking mechanism, and the forced opening or unlocking mechanism is: when the contact switch is pressed for a long time by the height worker to reach the forced opening time, the remote control locking component will be forced to open.
6. The automatic alarm system for loss of protection of aerial work according to claim 1 is characterized in that: Each intelligent safety hook also includes a wind sensor and a particle sensor. The wind sensor is used to transmit wind information to the safety management terminal through the control chip, and the particle sensor is used to transmit particle concentration information in the air to the safety management terminal through the control chip.
7. The automatic alarm system for loss of protection of aerial work according to claim 1 is characterized in that: The security management terminal is provided with a shutdown mode, a sleep mode and a normal operation mode; when the security management terminal does not detect any set of information of the intelligent security hooks, the security management terminal automatically enters the sleep mode or the shutdown mode; when the security management terminal detects any set of information of the intelligent security hooks, the security management terminal automatically enters the normal operation mode.
8. The automatic alarm system for loss of protection of aerial work according to claim 1 is characterized in that: The storage unit adopts a dual-layer storage architecture, including a first storage layer and a second storage layer. The capacity of the first storage layer is smaller than the capacity of the second storage layer, and the read and write speed of the first storage layer is greater than the read and write speed of the second storage layer. The first storage layer is used to store any data within a set time range, and the second storage layer is used to store any data outside the set time range.
9. An automatic alarm method for high-altitude work without protection, comprising the automatic alarm system for high-altitude work without protection as claimed in any one of claims 1 to 8, characterized in that: The steps include: S1. When the remote control locking component receives an opening or unlocking signal, the control chip determines whether the opening or unlocking signal is triggered by a high-altitude worker or a remote trigger of the safety management terminal; S2. When the control chip determines that the opening or unlocking signal is triggered by the high-altitude worker, the control chip determines whether the high-altitude work task is a single person or multiple people; when the high-altitude work task is a single person, the control chip asks through the voice module whether it is determined that the remote control locking component needs to be opened or unlocked. When the voice module receives a "yes" reply, the control chip opens or unlocks the remote control locking component; when the voice module does not receive a reply within the preset time, the control chip automatically alarms the safety management terminal, and the safety management terminal judges whether the data value of the height sensor and / or temperature sensor of the high-altitude worker changes within the set time and exceeds the set threshold, and then gives an audible and visual alarm and arranges rescue; when the set threshold is exceeded, the safety management terminal gives an audible and visual alarm and arranges rescue; when the set threshold is not exceeded, the safety management terminal asks "Is it safe" a set number of times through the voice module of the control chip. When no reply is received after the set number of times, the safety management terminal gives an audible and visual alarm and arranges rescue; When multiple people are involved in the aerial work, the control chip communicates with the safety management terminal, and the safety management terminal controls the voice modules of the intelligent safety hooks of multiple workers to ask "whether the contact switches of other workers have been touched by mistake". When a voice module receives a "yes" reply, the safety management terminal closes or locks the opening or unlocking signal; when no voice module receives a "yes" reply within the set time, the safety management terminal inquires "whether it is safe" a set number of times through the voice module of the control chip. If no reply is received after the set number of times, the safety management terminal issues an audible and visual warning and arranges rescue; S3. When the control chip determines that the opening or unlocking signal is remotely triggered by the security management terminal, the control chip encrypts the specific identifier through the lora communication module to obtain an encrypted signal, and the control chip transmits the encrypted signal to the security management terminal. If the control chip does not receive a reply from the security management terminal within the preset time or the security management terminal does not send an instruction to upload the encrypted signal, the control chip closes or locks the opening or unlocking signal.
10. The method according to claim 9, characterized in that Step S3 also includes: The control chip encrypts the data value of the height sensor and / or temperature sensor through the lora communication module to obtain a secondary encrypted signal, and the control chip transmits the secondary encrypted signal to the security management terminal. If no reply is received from the security management terminal within the preset time or the security management terminal does not send an instruction to upload the secondary encrypted signal or the data value of the height sensor and / or temperature sensor decoded by the security management terminal is different from the data in the storage unit, the control chip turns off or locks the open or unlock signal.