Intelligent-sensing fusion type safety warning device for electric climbing ladder and warning method of intelligent-sensing fusion type safety warning device

Abstract

The invention discloses an intelligent-sensing fusion type safety warning device for an electric climbing ladder and a warning method of the intelligent-sensing fusion type safety warning device. The device is characterized by comprising a carrier detachably mounted on a climbing ladder pedal, a pressure sensor arranged on the carrier and used for detecting whether the pedal bears load or not, infrared sensors oppositely arranged on the two sides of the carrier and used for detecting a human body, and a controller detachably connected with the carrier and electrically connected with the pressure sensor and the infrared sensors; according to the invention, through cooperative arrangement of the pressure sensor and the infrared sensor, a dual detection and signal fusion judgment mechanism is constructed; when the controller confirms that the effective pressure signal and the effective human body detection signal are received at the same time, the controller judges that the operator is in the ladder climbing operation state and triggers the corresponding safety warning, so that the interference situations such as non-person bearing or transient passing are remarkably eliminated, the false alarm rate is greatly reduced, and the accuracy and reliability of the safety warning are improved.

Description

Technical Field

[0001] This invention relates to the field of power construction safety equipment technology, specifically to an intelligent sensing integrated safety warning device and warning method for power climbing ladders. Background Technology

[0002] Elevating ladders are commonly used climbing equipment in power construction and maintenance operations, providing convenient support for workers to climb. According to the safety regulations of the power industry, when workers reach a certain height on an elevated ladder, usually 1.5 meters or more, they must wear safety belts and strictly control the duration of each operation to prevent fatigue or negligence caused by prolonged work, which could lead to falls or other safety accidents.

[0003] However, in actual work scenarios, workers often focus on core operations such as line connection and equipment maintenance, and easily overlook height restriction locations, failing to fasten their safety belts in time. At the same time, some complex operations may lead to excessively long single stays, causing fatigue work risks and posing a great threat to construction safety.

[0004] Currently available safety warning devices for working at heights generally suffer from limited functionality and practicality. Most of these devices rely on a single sensing method for warning, either using a pressure sensor to detect the weight on the platform or an infrared sensor to detect human body signals. This results in a high false alarm rate and a lack of intelligent, long-term monitoring and multiple warning designs. For example, devices using only pressure sensors cannot effectively distinguish whether the weight on the platform is from a worker standing or tools, easily triggering false alarms when tools are placed. Devices using only infrared sensors may generate false alarms due to non-human obstructions such as clothing blown by the wind or passing debris, interfering with normal operations.

[0005] Furthermore, the existing safety warning devices have poor installation adaptability. Their structural design is often only compatible with specific models and sizes of ladders, and cannot flexibly match different specifications of construction ladders. At the same time, the connection between the device and the ladder is mostly a fixed structure, which makes disassembly cumbersome and inconvenient for workers to move between multiple work points and reuse the device. In terms of warning methods, existing equipment is mostly based on a single sound warning, but the power construction environment is often accompanied by noise from equipment operation, vehicle roars, and other interferences, making a single sound warning easy to ignore and unable to ensure the effective transmission of warning information.

[0006] Therefore, there is an urgent need in this field for a safety warning device for power ladders that can accurately identify the status of workers, reduce false alarm rates, and has functions such as easy installation, multiple warnings, and time-based monitoring, in order to fill the gap in existing technology and improve the safety and standardization of power work at heights. To this end, an intelligent sensing integrated safety warning device and its warning method for power ladders are proposed. Summary of the Invention

[0007] The purpose of this invention is to solve the above problems by proposing an intelligent sensing integrated safety warning device and warning method for electric ladders.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a smart sensing fusion safety warning device for electric ladders, characterized in that: it includes a carrier detachably mounted on the ladder steps, a pressure sensor mounted on the carrier for detecting whether the steps are under load, infrared sensors mounted opposite each other on both sides of the carrier for detecting human bodies, and a controller detachably connected to the carrier and electrically connected to the pressure sensor and the infrared sensor; the carrier includes an upper shell that fits against the upper surface of the ladder steps, a lower shell located at the bottom of the ladder steps and detachably connected to the upper shell, and side plates mounted at both ends of the upper and lower shells for mounting the infrared sensors; the controller is configured to trigger a safety warning only when it simultaneously receives a valid pressure signal from the pressure sensor and a valid human body detection signal from the infrared sensor.

[0009] More preferably, the upper housing has a mounting groove for accommodating the pressure sensor.

[0010] More preferably, the upper housing has a mounting groove adapted to the pressure sensor.

[0011] More preferably, the side plate includes an upper side plate disposed on the outside of the upper housing and adapted to be connected to the infrared sensor, and a lower side plate disposed on the outside of the lower housing and detachably connected to the upper side plate; the upper side plate is provided with a limiting notch at the corresponding mounting groove position, which fits with the structure at both ends of the pressure sensor to limit the displacement of the pressure sensor.

[0012] More preferably, the controller includes a packaged housing detachably connected to the lower housing of the carrier, a main control module disposed within the packaged housing for receiving and processing signals from pressure sensors and infrared sensors, a power supply module for providing electrical energy, an alarm execution unit for performing an alarm action when the main control module triggers an alarm, and an operation unit disposed on the packaged housing.

[0013] More preferably, the controller further includes a power display electrically connected to the power module, and a wireless charging port and a wired charging interface disposed on the housing for charging the power module.

[0014] More preferably, the warning execution unit includes a buzzer and / or a built-in strobe light electrically connected to the main control module and the power module, and the operation unit includes a power switch mounted on the housing and electrically connected to the power module and a knob for adjusting the volume of the buzzer.

[0015] More preferably, the controller further includes a timing module electrically connected to the main control module for starting timing when an alarm is triggered.

[0016] More preferably, a detachable connection structure is provided between the lower housing and the encapsulation shell. The detachable connection structure is a mutually cooperating slot and block, buckle and seat, or backpack hole and hanging piece.

[0017] More preferably, the warning execution unit also includes an external strobe light electrically connected to the controller.

[0018] A smart sensor-integrated safety warning method for electric ladders, characterized by the following warning method: S1. Turn on the power switch to start the controller and put it into working condition to monitor the signals of the pressure sensor and infrared sensor in real time. S2. When the operator steps onto the pedal with the carrier installed, the pressure sensor senses the pressure signal that reaches or exceeds the preset threshold, and at the same time the infrared sensor senses the human body occlusion signal, and transmits the two types of signals to the controller simultaneously. S3. The main control module in the controller performs a fusion judgment on the received signals. Only when a valid pressure signal from the pressure sensor and a valid human body detection signal from the infrared sensor are received simultaneously will the alarm execution unit be immediately triggered to control the buzzer to emit an audible alarm and / or control the built-in strobe light to emit a flashing alarm. If the device is connected to an external strobe light, it will be controlled to emit a flashing alarm simultaneously or selectively.

[0019] S4. When the main control module triggers the warning execution unit, if the device is equipped with a timing module, the timing module will be started to continuously time the device. If the time the operator stays at the pedal position reaches the preset time threshold, the warning execution unit will be controlled to issue an overtime reminder.

[0020] The beneficial effects of this invention are as follows: By coordinating the use of pressure sensors and infrared sensors, a dual detection and signal fusion judgment mechanism is constructed; the controller only determines that the operator is in a ladder-climbing state and triggers the corresponding safety warning when it simultaneously confirms the receipt of a valid pressure signal and a valid human body detection signal. This significantly eliminates interference from non-human load-bearing or brief passage, greatly reduces the false alarm rate, and improves the accuracy and reliability of safety warnings. The controller employs a modular integrated design, compactly encapsulating each functional unit for easy assembly and maintenance, as well as reliable operation. Its adaptive human-machine interface supports adjustable-volume voice prompts and high-brightness dual-color strobe warnings, adapting to complex operating environments. The integrated dual-mode charging system and real-time power display ensure continuous power supply and operational safety, enhancing the accuracy, reliability, and environmental adaptability of safety warnings. By setting a timing module and coordinating it with instant triggering alerts, a dual early warning mechanism combining instant alerts and timeout alerts is formed. It can immediately remind operators to enter the height-restricted area through sound and light, and can also monitor the time personnel stay in the dangerous area in real time through the timing module. Once the stay time exceeds the preset safety threshold, the system will promptly issue an upgraded alarm, thereby effectively preventing safety accidents caused by working in high-risk positions for a long time, realizing a functional upgrade from passive reminders to proactive safety intervention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the carrier structure in this invention; Figure 3 This is a structural schematic diagram of the carrier from another perspective in this invention; Figure 4 This is a schematic diagram of the upper shell structure in this invention; Figure 5 This is a schematic diagram of the side plate structure in this invention; Figure 6 This is a schematic diagram of the controller structure in this invention; Figure 7 This is a schematic diagram of the internal structure of the controller in this invention; Figure 8 This is a schematic diagram of the external strobe light structure in this invention; Figure 9 This is a schematic diagram of the structure in use of the present invention.

[0022] Legend: 1. Carrier; 11. Upper shell; 111. Mounting groove; 12. Lower shell; 13. Side plate; 131. Upper side plate; 1311. Limiting notch; 132. Lower side plate; 2. Controller; 21. Encapsulation shell; 22. Main control module; 23. Power module; 24. Timing module; 25. Power display; 26. Wireless charging port; 27. Wired charging interface; 28. Buzzer; 29. ​​Built-in strobe light; 210. Power switch; 211. Knob; 3. Pressure sensor; 4. Infrared sensor; 5. External strobe light. Detailed Implementation

[0023] The following description, in conjunction with the accompanying drawings, further illustrates the intelligent sensing integrated safety warning device and warning method for electric ladders according to the present invention.

[0024] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly; for example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can also mean a mechanical connection, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] See appendix Figure 1 -Appendix Figure 9 As shown, an intelligent sensing fusion safety warning device and its warning method for electric ladders are characterized by: a carrier 1 detachably mounted on the ladder steps, a pressure sensor 3 disposed on the carrier 1 for detecting whether the steps are under load, infrared sensors 4 disposed opposite each other on both sides of the carrier 1 for detecting human bodies, and a controller 2 detachably connected to the carrier 1 and electrically connected to the pressure sensor 3 and the infrared sensor 4; the carrier 1 includes an upper shell 11 that fits against the upper surface of the ladder steps, a lower shell 12 located at the bottom of the ladder steps and detachably connected to the upper shell 11, and side plates 13 disposed at both ends of the upper shell 11 and the lower shell 12 for mounting the infrared sensors 4; the controller 2 is configured to trigger a safety warning only when it simultaneously receives a valid pressure signal from the pressure sensor 3 and a valid human body detection signal from the infrared sensor 4.

[0027] The carrier 1 is made of high-strength engineering plastic and can be firmly clamped to the designated steps of the ladder; the upper shell 11 is located above the step and has anti-slip texture on its surface. It is detachably connected to the lower shell 12 by bolts or buckles. The two work together to cover the step and achieve a stable clamping and fixing; the side plates 13 are fixed to both ends after the upper shell 11 and the lower shell 12 are installed.

[0028] The pressure sensor 3 is preferably an elongated strip structure, with its sensing surface flush with or slightly convex to the upper surface of the upper housing 11. It is used to detect the pressure generated by an operator's foot stepping on the sensor and transmit this pressure signal to the controller 2. Two infrared sensors 4 are arranged opposite each other, forming a detection area between their transmitting and receiving ends. When a human body enters this area and blocks the infrared beam, the infrared sensor 4 generates a corresponding detection signal and transmits it to the controller 2. The effective pressure signal refers to the pressure value detected by the pressure sensor 3 exceeding a preset threshold used to distinguish between human stepping and the placement of small, lightweight objects such as tools. The effective human body detection signal refers to the infrared sensor 4 detecting that its infrared beam is continuously blocked for more than a set short period of time.

[0029] The controller 2 is used to provide power to the pressure sensor 3 and the infrared sensor 4, receive and determine the validity of signals from both, and trigger a safety warning based on the determination result.

[0030] By coordinating the pressure sensor 3 and the infrared sensor 4, a dual detection and signal fusion judgment mechanism is constructed. The controller 2 only determines that the operator is in the ladder operation state when it simultaneously confirms that it receives a valid pressure signal and a valid human body detection signal, and triggers the corresponding safety warning. This significantly eliminates interference situations such as non-human load-bearing or brief passage, greatly reduces the false alarm rate, and improves the accuracy and reliability of safety warnings.

[0031] See appendix Figure 4 Appendix Figure 5 As shown, the upper housing 11 has a mounting groove 111 for accommodating the pressure sensor 3; the side plate 13 includes an upper side plate 131 disposed on the outside of the upper housing 11 and adapted to be connected to the infrared sensor 4, and a lower side plate 132 disposed on the outside of the lower housing 12 and detachably connected to the upper side plate 131; the upper side plate 131 has a limiting notch 1311 corresponding to the mounting groove 111, which fits the structure at both ends of the pressure sensor 3 to limit the displacement of the pressure sensor 3.

[0032] The depth of the mounting groove 111 matches the thickness of the pressure sensor 3, ensuring that the sensing surface of the pressure sensor 3 is flush with or slightly raised above the upper surface of the upper housing 11 after installation, so as to accurately sense the pressure of the foot stepping; the shape of the limiting notch 1311 matches the structure at both ends of the pressure sensor 3, which can effectively limit the horizontal displacement of the pressure sensor 3. During installation, first, the pressure sensor 3 is embedded in the mounting groove 111 of the upper housing 11; then, the cable of the pressure sensor 3 is passed through the limiting notch 1311 on the upper side plate 131, and then the upper side plate 131 is attached to both sides of the upper housing 11, and the upper side plate 131 is installed between the two columns of the ladder; at this time, the limiting notch 1311 of the upper side plate 131 presses the two ends of the pressure sensor 3 into the notch to prevent displacement when people step on it; finally, the lower side plate 132 is fixed to the outside of the lower housing 12 and connected to the upper side plate 131 by buckles or screws to achieve a stable assembly of the overall structure.

[0033] See appendix Figure 6 Appendix Figure 7 As shown, the controller 2 includes an encapsulation shell 21 detachably connected to the lower shell 12 of the carrier 1, a main control module 22 disposed within the encapsulation shell 21 for receiving and processing signals from the pressure sensor 3 and the infrared sensor 4, a power supply module 23 for providing power, an alarm execution unit for performing an alarm action when the main control module 22 triggers an alarm, and an operation unit disposed on the encapsulation shell 21; the controller 2 also includes a power display 25 electrically connected to the power supply module 23, and a wireless charging port 26 and a wired charging interface 27 disposed on the encapsulation shell 21 for charging the power supply module 23; the alarm execution unit includes a buzzer 28 and / or a built-in strobe light 29 electrically connected to the main control module 22 and the power supply module 23, and the operation unit includes a power switch 210 mounted on the encapsulation shell 21 and electrically connected to the power supply module 23, and a knob 211 for adjusting the volume of the buzzer 28.

[0034] The main control module 22, as the core processing unit, is implemented using a microcontroller module and is responsible for real-time processing of pressure signals from the pressure sensor 3 and human detection signals from the infrared sensor 4. The power module 23 uses a rechargeable lithium battery pack to provide power for the entire device. The power display 25 displays the remaining power of the power module 23 in real time through LED indicators or a digital display screen, making it easy for users to monitor the power supply status of the device. The volume of the buzzer 28 can be continuously adjusted via the knob 211 to meet the warning needs under different ambient noise conditions. The built-in strobe light 29 uses a high-brightness red and blue dual-color LED, which emits strong light in an alternating flashing mode during operation to enhance the visual warning effect. The encapsulation shell 21 is also equipped with several connectors, which include a dedicated signal structure for connecting the pressure sensor 3 and the infrared sensor 4 via multi-core cables and an output interface for connecting an external strobe light, providing good compatibility and convenience for expanding the device's functions.

[0035] When the operator steps onto the pedal on which the carrier 1 is installed, the pressure sensor 3 and the infrared sensor 4 detect a valid signal and transmit it to the main control module 22. After the main control module 2 fuses and judges the two signals and confirms their validity, it immediately drives the warning execution unit to control the buzzer 28 to issue a voice reminder that "the height limit has been reached, please pay attention to safety" and at the same time controls the built-in flashing light 29 to start flashing red and blue alternately.

[0036] In terms of power supply, the controller 2 supports two charging methods: a Qi-compliant wireless charging port 26 and a wired charging port 27 with a USB-C interface or a dedicated circular power interface, to meet the user's convenient charging needs in different scenarios.

[0037] The controller 2 uses a modular integrated design to compactly encapsulate each functional unit, achieving easy assembly and maintenance as well as reliable operation. Its adaptive human-machine interface supports adjustable voice prompts and high-brightness dual-color flashing warnings, making it adaptable to complex working environments. The integrated dual-mode charging system and real-time power display function ensure continuous power supply and safe use, improving the accuracy, reliability, and environmental adaptability of safety warnings.

[0038] In one embodiment, the controller 2 further includes a timing module 24 electrically connected to the main control module 22 for starting a timer when an alarm is triggered.

[0039] The timing module 24 is electrically connected to the power supply module 23 and connected to the main control module 22 via a signal line. When the main control module 22 simultaneously receives valid signals from the pressure sensor 3 and the infrared sensor 4, the timing module 24 automatically starts timing, accumulating the time personnel spend in the hazardous area in real time and comparing it with a preset safe time threshold. The preset safe time threshold can be set according to the electrical safety operation procedures, for example, 30 minutes, and can be configured and adjusted through the program of the main control module 22. If the continuous stay time exceeds the set threshold, the timing module 24 immediately sends an overtime signal to the main control module 22, triggering an upgraded alarm. At this time, the buzzer 28 emits a voice prompt of "Operation timeout, please pay attention to the operation duration," and the built-in flashing light 29 flashes at a faster frequency to enhance the warning intensity.

[0040] By setting a timing module 24 and coordinating it with instant triggering alerts, a dual early warning mechanism combining instant alerts and timeout alerts is formed. It can immediately remind operators to enter the height-restricted area through sound and light, and can also monitor the time personnel stay in the dangerous area in real time through the timing module 24. Once the stay time exceeds the preset safety threshold, the system will promptly issue an upgraded alarm, thereby effectively preventing safety accidents caused by working in high-risk positions for a long time, and realizing the functional upgrade from passive reminders to proactive safety intervention.

[0041] In one embodiment, the warning execution unit further includes an external strobe light 5 electrically connected to the controller 2.

[0042] The external strobe light 5 uses a high-brightness LED module, which can produce high-intensity strobe. The external strobe light 5 is equipped with an adjustable mounting bracket, which can be fixed to the ladder post or other conspicuous positions. When the main control module 22 receives valid signals from the pressure sensor 3 and the infrared sensor 4 at the same time, the external strobe light 5 and the warning component of the controller 2 are activated synchronously. Through visual superposition and spatial extension, a synergistic and enhanced composite warning effect is formed, thereby significantly improving the overall warning coverage and perception intensity.

[0043] See appendix Figure 3 Appendix Figure 6 Appendix Figure 7 As shown, a detachable connection structure is provided between the lower housing 12 and the encapsulation housing 21. The detachable connection structure is a mutually cooperating slot and block, buckle and seat, or backpack hole and hanging piece.

[0044] When using a slot and a locking block, the lower surface of the lower housing 12 has a guide slot, and the back of the casing 21 of the controller 2 has a corresponding locking block, achieving mechanical interlocking through push-in installation. When using a buckle and a mounting base, the lower housing 12 has a buckle with an elastic latch, and the controller 2 has a corresponding mounting base, achieving self-locking fixation through pressing. Disassembly requires operation of the release mechanism. When using a backpack hole and a hanging accessory, the casing 21 of the controller 2 has a standard threaded backpack hole, and the lower housing 12 is equipped with a corresponding quick-release accessory, achieving a stable connection through screwing or snapping. This structure features a high degree of standardization. All three structures enable quick assembly and disassembly of the controller 2 and the lower housing 12, meeting different installation requirements and facilitating the disassembly and charging of the controller 2.

[0045] When this invention is in operation: First, the upper shell 11 of the carrier 1 is attached to the upper surface of the step at the height limit position of the ladder, and the lower shell 12 is attached to the lower surface of the step. The two are fastened together by bolts or buckles, so that the carrier 1 surrounds and clamps and fixes itself to the step. The length of the carrier 1 is designed to be slightly less than the length of the step to ensure the compatibility and stability of the installation.

[0046] Subsequently, the elongated pressure sensor 3 is precisely embedded in the mounting groove 111 of the upper housing 11; and its position is adjusted to ensure that the sensing surface of the pressure sensor 3 is flush with or slightly protruding from the upper surface of the upper housing 11, so as to ensure the accuracy of pressure detection.

[0047] Next, the pre-charged controller 2 is securely installed under the lower housing 12 of the carrier 1 via the detachable connection structure between the lower housing 12 and the controller 2. During installation, it must be ensured that the remaining power of the controller 2 is sufficient to meet the requirements of at least one complete climbing operation.

[0048] When installing the side plate 13, first pass the cable of the pressure sensor 3 through the limiting notch 1311 of the upper side plate 131 on one side, and then install the upper side plate 131 and the lower side plate 132 at both ends of the upper housing 11 and the lower housing 12 respectively, ensuring that the limiting notch 1311 of the upper side plate 131 is just engaged with both ends of the pressure sensor 3 to effectively limit its displacement; then connect the cable of the pressure sensor 3 that has been passed through to the corresponding signal connector of the controller 2.

[0049] Then, install the two infrared sensors 4 onto the inner sidewalls of the upper side panels 131 on both sides using bolts, clips, or cable ties. After installation, the sensing angle needs to be precisely adjusted to ensure that the detection area formed can completely cover the set safety range above the pedal. Finally, connect the sensor cables to the reserved connectors of the controller 2 to ensure the reliability of signal transmission.

[0050] In noisy work environments, an external flashing light 5 should be installed to enhance visual warning effects. It should be securely installed on the ladder post or other conspicuous location, and its cable should be connected to the corresponding output connector of the controller 2.

[0051] After installation, turn on the power switch 210 of controller 2. The system will then complete the initialization self-test and enter the standby monitoring state.

[0052] When the operator steps onto the pedal on which the carrier 1 is installed, the pressure sensor 3 senses a pressure signal exceeding a preset threshold, and the infrared sensor 4 senses an obstruction signal generated by the human body entering its detection area.

[0053] The two types of sensor signals are synchronously transmitted to the main control module 22 of the controller 2. The main control module 22 will trigger the execution of the warning action when it receives a valid pressure signal and a human body occlusion signal at the same time: triggering the buzzer 28 to issue a voice reminder of "the height limit has been reached, please pay attention to safety"; the built-in strobe light 29 and the external strobe light 5 (if connected) start to flash intermittently at a preset frequency.

[0054] At the same time, the timing module 24 starts timing the operator's continuous stay time; if the main control module 22 detects through the timing module 24 that the operator's continuous stay time at the position reaches a preset threshold, such as 30 minutes, the buzzer 28 is triggered to issue an enhanced voice reminder of "Operation timeout, please pay attention to the operation duration"; the volume of the buzzer 28 can be adjusted by the knob 211.

[0055] When the operator leaves the pedal, causing the signals from pressure sensor 3 and infrared sensor 4 to disappear simultaneously, the main control module 22 will immediately stop all audible and visual warnings, the timing module 24 will automatically reset, and then the system will return to standby monitoring state, waiting for the next trigger; when not in use for a long time, the power switch 210 should be manually turned off.

[0056] When the power display 25 on the controller 2 indicates that the power is too low, the controller 2 can be removed through the detachable connection mechanism between it and the lower housing 12, and charged using its wireless charging port 26 or wired charging interface 27; after charging is complete, it can be reinstalled into the lower housing 12 to restore the full functionality of the system.

[0057] The scope of protection of this invention is not limited to the above embodiments and their variations. Conventional modifications and substitutions made by those skilled in the art based on the content of these embodiments are all within the scope of protection of this invention.

Claims

1. A smart sensor-integrated safety warning device for electric ladders, characterized in that: The system includes a carrier (1) detachably mounted on the steps of a staircase, a pressure sensor (3) mounted on the carrier (1) for detecting whether the steps are under load, infrared sensors (4) mounted opposite each other on both sides of the carrier (1) for detecting the human body, and a controller (2) detachably connected to the carrier (1) and electrically connected to the pressure sensor (3) and the infrared sensor (4); the carrier (1) includes an upper shell (11) that fits against the upper surface of the staircase steps, a lower shell (12) located at the bottom of the staircase steps and detachably connected to the upper shell (11), and side plates (13) mounted at both ends of the upper shell (11) and the lower shell (12) for mounting the infrared sensor (4); the controller (2) is configured to trigger a safety warning only when it simultaneously receives a valid pressure signal from the pressure sensor (3) and a valid human body detection signal from the infrared sensor (4).

2. The intelligent sensing and fusion safety warning device for electric ladders according to claim 1, characterized in that: The upper housing (11) is provided with a mounting groove (111) for accommodating the pressure sensor (3).

3. The intelligent sensing and fusion safety warning device for electric ladders according to claim 2, characterized in that: The side plate (13) includes an upper side plate (131) disposed on the outside of the upper housing (11) and adapted to the infrared sensor (4) and a lower side plate (132) disposed on the outside of the lower housing (12) and detachably connected to the upper side plate (131); the upper side plate (131) is provided with a limiting notch (1311) corresponding to the mounting groove (111) position, which fits the structure at both ends of the pressure sensor (3) to limit the displacement of the pressure sensor (3).

4. The intelligent sensing and fusion safety warning device for electric ladders according to claim 1, characterized in that: The controller (2) includes a packaged shell (21) detachably connected to the lower shell (12) of the carrier (1), a main control module (22) disposed inside the packaged shell (21) for receiving and processing signals from the pressure sensor (3) and the infrared sensor (4), a power supply module (23) for providing power, an alarm execution unit for performing an alarm action when the main control module (22) triggers an alarm, and an operation unit disposed on the packaged shell (21).

5. The intelligent sensing and fusion safety warning device for electric ladders according to claim 4, characterized in that: The controller (2) also includes a power display (25) electrically connected to the power module (23) and a wireless charging port (26) and a wired charging interface (27) disposed on the housing (21) for charging the power module (23).

6. The intelligent sensing and fusion safety warning device for electric ladders according to claim 4, characterized in that: The warning execution unit includes a buzzer (28) and / or a built-in strobe light (29) electrically connected to the main control module (22) and the power module (23). The operation unit includes a power switch (210) mounted on the encapsulation shell (21) and electrically connected to the power module (23) and a knob (211) for adjusting the volume of the buzzer (28).

7. The intelligent sensing and fusion safety warning device for electric ladders according to claim 4, characterized in that: The controller (2) also includes a timing module (24) electrically connected to the main control module (22) for starting the timing when an alarm is triggered.

8. The intelligent sensing and fusion safety warning device for electric ladders according to claim 4, characterized in that: The lower housing (12) and the encapsulation housing (21) are provided with a detachable connection structure, which is a slot and block, buckle and seat or backpack hole and hanging piece that cooperate with each other.

9. A smart sensor-integrated safety warning device for electric ladders according to claim 6, characterized in that: The warning execution unit also includes an external strobe light (5) that is electrically connected to the controller (2).

10. A smart sensor-integrated safety warning method for electric ladders according to any one of claims 1-9, characterized in that, The warning methods are as follows: S1. Turn on the power switch to start the controller and put it into working condition to monitor the signals of the pressure sensor and infrared sensor in real time. S2. When the operator steps onto the pedal with the carrier installed, the pressure sensor senses the pressure signal that reaches or exceeds the preset threshold, and at the same time the infrared sensor senses the human body occlusion signal, and transmits the two types of signals to the controller simultaneously. S3. The main control module in the controller performs fusion judgment on the received signals. Only when a valid pressure signal from the pressure sensor and a valid human body detection signal from the infrared sensor are received simultaneously will the alarm execution unit be immediately triggered to control the buzzer to emit an audible alarm and / or control the built-in strobe light to emit a flashing alarm. If the device is connected to an external strobe light, it will be controlled to emit a flashing alarm simultaneously or selectively. S4. When the main control module triggers the warning execution unit, if the device is equipped with a timing module, the timing module will be started to continuously time the device. If the time the operator stays at the pedal position reaches the preset time threshold, the warning execution unit will be controlled to issue an overtime reminder.

Images